=== Let's Drone Out — Episode 328 ===
Title: LDO 328 - The Neeeed For Speed
Recorded: 2021-12-09
Hosts: Wayne "CurryKitten" Andrews, Jack "Brightontillifly" Nash, Stephen "Belrik" Howell, Andrew "Frank" Hyams, Tony "TheTonstar1" Marchant
Guest(s): Rupert (OMEGOOLIEBIRD)
Total audience: 2,583
Platforms: YouTube (https://www.youtube.com/watch?v=JzDyTuNr0f0); SoundCloud (http://www.podtrac.com/pts/redirect.mp3/feeds.soundcloud.com/stream/1176095671-letsdroneout-ldo-328-the-neeeed-for-speed.mp3)
=====================================

Rupert is https://www.youtube.com/user/OMEGOOLIEBIRD
His latest exploit is https://www.youtube.com/watch?v=oYCQW-Mhzug

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[0.0] Jack: Hello and you're listening to Let's Drone Out and special thank you to our lovely patrons that help donate so that we can pay the editor to remove the swear words and silly things we say. Massive thank you too.
[14.0] Jack: Carlos Campos.
[16.0] Jack: Art Faulkner.
[18.0] Jack: Sam Dahmer.
[20.0] Jack: Mikey Dread.
[22.0] Jack: On with the show.
[24.0] Jack: Let's Drone Out now.
[54.51] Jack: And welcome to Let's Drone Out. Thank you for joining us. Today is Thursday the 9th of the 12th 2021.
[66.51] Jack: Everyone's favorite curry kitten.
[68.51] Jack: Oh, that's me. Hello.
[70.51] Jack: Oh my Google bird.
[74.51] Jack: I think.
[78.51] Jack: Okay, and Stephen.
[82.51] Jack: Hello.
[84.51] Jack: My darling wife, Tony.
[86.51] Jack: For sure.
[88.51] Jack: With Coco, his doggo.
[92.51] Jack: Can you give us like a little pretend work as if she'd done it.
[96.51] Jack: Okay, fantastic. And our Lord and Master Frank.
[100.51] Jack: And I'm bright until I fly.
[104.51] Jack: And let's start the show. Stephen, you already start milking.
[110.51] Tony: Yeah.
[112.51] Stephen: Oh, yeah.
[114.51] Curry: We better introduce who we've got on first.
[116.51] Curry: Yeah, this, this man over here.
[120.51] Curry: Omi Googlybird, or better known as Rupert, is the holder, many holders of world records for FPV planes.
[130.51] Curry: He basically flies in very, very fast. And I thought he'd be a great person to get on because aside from the fact that it can be exciting to fly wings.
[139.51] Curry: Lots of people are probably interested in how you make them go faster and stuff. And I did have a quick, a quick video to show, I think, loads of people like over 100,000 people have watched your last video, Rupert, with that thing going really, really quickly.
[156.51] Curry: But going back to the olden days, when you were flying measly success fun jets, I wanted to show the launch to people about what how you did it because there is so much talk role.
[169.51] Curry: When you're winding up your motors. It looks pretty interesting. So I've got my video up quickly. This is from one of our mad dogs meets many years ago.
[182.51] Curry: And before Rupert even gets to the part where he froze the plane, what he has to do is pace up and down, psyching himself up.
[191.51] Curry: Because to say it's a bit of a handful, like, I am a terrible line of sight flow, I can barely sort of throw it and get back on the sticks. This is how Rupert launches it.
[203.51] Curry: You won't be able to hear it, because the town doesn't come through. But that's what it does. It just rolls over and over. And then the other thing Rupert seems to have is magic eyes, because I can't see it.
[216.51] Curry: And then he can see it. And then all you see is the thing come past it like 200 miles an hour, like a couple of inches off the ground, a bit like an excellent missile.
[226.51] Curry: And yeah, this this is the sort of thing he does. And this is this is why Rupert's kind of the one person who I'm sort of always excited to see flying line of sight because it actually makes it look like normally I think line of sight is boring.
[239.51] Curry: It's going around in circles, go to FPV. When you do that, when you have magic eyes, and then this missile just comes through. It's amazing. And if you if you if you want to watch that video with sound on it's on my channel, you will also hear it come back doing a glide.
[255.51] Curry: And that is one of the most amazing noises as well. There's just the sound of it displacing the air without motor. It's just like, whoo, it's amazing.
[265.51] Curry: Welcome Rupert. How did our regular question for August is, how did you get into RC flying? How'd you get into it? What's your history?
[277.51] Rupert (OMEGOOLIEBIRD): How did I get into it? Hello, everybody. When I was about eight or something, I think my dad took me to a model club back in the 80s. And we learned with a high wing trainer, he built it, I flew it, nitro plane and learned to fly that, learned to crash it, we learned to repair it.
[296.51] Rupert (OMEGOOLIEBIRD): But it was kind of boring. I started to get a bit bored of it. And so my dad got me a thing called a Mirus, which was a delta wing engine at the front, but a delta wing and a tail at the back.
[309.51] Rupert (OMEGOOLIEBIRD): And it was like 110 miles an hour probably, I should think, but it really like gave me a kick. I really enjoyed it compared to flying trainers. I crashed that in the end and then kind of gave up modelling for years really until what I call the hobby king era when all of a sudden lipo batteries and really cheap prices from China and actually quite good equipment became more mainstream.
[336.51] Rupert (OMEGOOLIEBIRD): It was actually Mike Brewer of...
[341.51] Rupert (OMEGOOLIEBIRD): Hold out your hand.
[344.51] Rupert (OMEGOOLIEBIRD): Yeah, that's him. He flew at one of our local model clubs and like 10 years ago, he had a quadcopter and he had a camera on it and he had a pair of goggles. And he was flying it around and I thought, that's crazy. He's actually flying on board that thing.
[357.51] Rupert (OMEGOOLIEBIRD): And I put the goggles on and I was just blown away. Obviously it was 10 year old tech. It was tiny little screens and a little camera and it was all over the place. But the fact was, he was flying it remotely and I've always wanted to fly, but don't really fancy general aviation because obviously the cost and everything like that.
[376.51] Rupert (OMEGOOLIEBIRD): So this gives you a kind of way to put your head in the sky. And he said it's called FPV and I was like, wow. So straight on YouTube, you know, what is FPV? And then kind of went from there really in the same interest in, you know, I flew a Bixler to start with and then I put the two and two together like I really enjoyed going first and I want to do FPV and just it's just snowballed from there.
[399.51] Stephen: How did you practice the launches? Because I mean, that slower launch that Curry showed us looked incredibly difficult. And when you're dropped from the quad and the power kicks in, it's just squirreling around. How do you do that?
[413.51] Rupert (OMEGOOLIEBIRD): To go first, you need a small plane and with a small plane with a lot of power, it's going to talk well. So there's a kind of tipping point where you haven't got a lot of power and you haven't got a lot of weight and you can throw it overhand and it will just fly out your hands straight.
[426.51] Rupert (OMEGOOLIEBIRD): And there's a point beyond that where it hasn't got enough power to go vertically, but when you launch it, it's got so much power still, it rolls over. So that really doesn't work. So it's best to miss that step out and go straight for something really powerful that will vertically launch.
[442.51] Rupert (OMEGOOLIEBIRD): It looks scary and most people that can fly a line of sight can fly a vertical roll. So it's just a case of starting your flight with a vertical roll. So as soon as you let go of the plane, it's gyroscopically keeping itself straight up near enough. It'll follow a bit of an arc, but pretty much it goes straight up.
[460.51] Rupert (OMEGOOLIEBIRD): And when it's up to airspeed, you just come out of the roll and fly away. So there's no, everything happens quite high off the ground. If you launch overhand, you're very close.
[470.51] Stephen: So you just want to get that 50, 100 meters of altitude right away.
[473.51] Rupert (OMEGOOLIEBIRD): Straight away. It's the ground that's going to cause you problems. So it seems like just getting right in the air is a good way to do it.
[480.51] Stephen: And when you're doing the opposite, you're dropping off the quad.
[484.51] Rupert (OMEGOOLIEBIRD): Dropping off the quad, this plane is a lot heavier. So it's got a lot, it's nine kilowatts as opposed to two or three. So the energy in the blades is pretty scary. If you run it, it really does not make you want to hold it. It's pretty terrifying to hear running.
[502.51] Rupert (OMEGOOLIEBIRD): I didn't really fancy holding it with the carbon blades. They're a bit of an unknown of that power. So I think they'd probably go through me and come out the other side.
[510.51] Rupert (OMEGOOLIEBIRD): So the drone really is the only option. And again, that's pretty easy. Just send it up. It's a DJI controller. So it just goes straight up from where he took off and you just pull the release lever and off it drops.
[521.51] Rupert (OMEGOOLIEBIRD): And when you open the power, there's still that same thing where it'll kick around a couple of times. And then once it gets enough airspeed for the control surfaces to take over.
[531.51] Stephen: Sounds a bit more dangerous, though, because you're pointed at the ground with the power on at that point waiting for it to kick it out, aren't you?
[537.51] Rupert (OMEGOOLIEBIRD): You've got airspeed. So the main thing for a plane is obviously heightened airspeed. If you haven't got either of those, you're going to hit the ground dropping from the drone.
[546.51] Rupert (OMEGOOLIEBIRD): The first thing that happens is it starts to pick up airspeed and it's already high off the ground. So you're high off the ground and you move it fast. So there's no reason why it won't fly.
[554.51] Stephen: So you don't have the problem with the rolling and waiting for it to come out of the roll as much?
[560.51] Rupert (OMEGOOLIEBIRD): I did on one of the drops, actually, with a T rearward CG, it took too long for it to pull its nose down. So I do run it slightly higher, slightly more nose heavy so that when it drops, it distinctly falls nose down and begins to get airspeed.
[574.51] Jack: Do you instantly have control because there's air moving over the surfaces as you fall?
[580.51] Jack: Yeah, pretty quickly.
[583.51] Rupert (OMEGOOLIEBIRD): Obviously, it'll fall a little bit before it starts to put its nose down. Once the nose is down, the airspeed picks up and you've not got enough control to pull up, but you start to be able to roll the way you want to go.
[595.51] Jack: Because the video that I saw, you had some really low lying mist or ground or whatever and you dropped and it was like, what is this guy doing? You can't see anything. Are you mental?
[613.51] Rupert (OMEGOOLIEBIRD): So the drop was okay. That was fine. It was just once I climbed up away from the drop. The cloud was at 300 metres. Just hit that.
[624.51] Curry: So a lot of people think, oh, it's good flying planes because you fly for 40 minutes and stuff like that. Now, on that fun jet thing, I had a feel of that battery after you flew it for three minutes and it hurt my hand because it was roasting hot.
[639.51] Curry: Do you get, what, one or two minutes out of those six S flights and that 14S one? That was pretty much done, wasn't it, after those couple of runs?
[648.51] Rupert (OMEGOOLIEBIRD): Yeah, so the one that you saw fly, that is actually a minute of full throttle. I don't take my finger off the throttle because it's easier just to keep the airspeed up rather than slow down the speed up.
[658.51] Rupert (OMEGOOLIEBIRD): So launch it and just keep it wide open and just do the one minute flight and then land it. Yeah, so that will do one minute straight, which is, that's plenty. Your brain's had enough at that point.
[670.51] Rupert (OMEGOOLIEBIRD): You're sweating.
[672.51] Rupert (OMEGOOLIEBIRD): It's enough.
[674.51] Tony: What did you start with then? Did you start four S and then go six and then think, oh, I'm going to go make my own batteries and go higher?
[684.51] Rupert (OMEGOOLIEBIRD): Yeah, I started on three S actually in a fun jet, at 100 amps going through a Dean's connector and then de-soldering the connectors.
[693.51] Rupert (OMEGOOLIEBIRD): No way.
[695.51] Rupert (OMEGOOLIEBIRD): You want wattage is what you want. You want horsepower, you want wattage going to the motor.
[700.51] Rupert (OMEGOOLIEBIRD): So you can either do it through amps with low voltage or you can do it using a higher voltage and lower amps.
[707.51] Rupert (OMEGOOLIEBIRD): And that does, if you go with that route, it means that the infrastructure in the plane is a lot lighter as well, smaller connectors, lighter wires and everything.
[713.51] Rupert (OMEGOOLIEBIRD): So it was a logical route to go up in voltage.
[717.51] Rupert (OMEGOOLIEBIRD): Obviously, the choice of components limits sort of, you know, where you can go in six S stuff is really cheap.
[723.51] Rupert (OMEGOOLIEBIRD): That use-all line was probably 220 pounds all in the plane, the servos, motor, ESC and everything.
[733.51] Rupert (OMEGOOLIEBIRD): But when you step up sort of above six S into 12 S and things, ESC is a couple of hundred quid each.
[739.51] Rupert (OMEGOOLIEBIRD): So, you know, the whole thing sort of steps up in seriousness.
[743.51] Curry: Yeah. We were just talking about some of the components before we started.
[747.51] Curry: And one of the things that some people may not consider is the servos you use on that plane.
[752.51] Curry: Because if you use your regular nine gram servo and you suddenly say, I want to do something, it's just not going to work.
[759.51] Curry: So those were like 50 quid servos a piece, weren't they?
[762.51] Curry: Yeah.
[763.51] Curry: How much?
[765.51] Rupert (OMEGOOLIEBIRD): Yeah, 50 quid servo, but there are only two of them. It's not our tale.
[769.51] Rupert (OMEGOOLIEBIRD): So it's better like that.
[771.51] Rupert (OMEGOOLIEBIRD): But yeah, you can't really spend enough money on servos, to be honest.
[774.51] Rupert (OMEGOOLIEBIRD): I think that, you know, I see a lot of planes where people say, oh, you know, this airframe is rubbish.
[778.51] Rupert (OMEGOOLIEBIRD): It doesn't fly very well.
[779.51] Rupert (OMEGOOLIEBIRD): And they've got three quid servos in it, you know, which don't center.
[782.51] Rupert (OMEGOOLIEBIRD): They're not kind of linear, whatever.
[784.51] Rupert (OMEGOOLIEBIRD): If you use expensive servos, everything flies nicely.
[786.51] Rupert (OMEGOOLIEBIRD): It really is a fact.
[788.51] Tony: Yeah.
[789.51] Tony: It's like when people make their cars go faster, but don't upgrade the brakes.
[793.51] Tony: You know what I mean?
[794.51] Rupert (OMEGOOLIEBIRD): Yeah.
[795.51] Rupert (OMEGOOLIEBIRD): I think with quad flying, you guys are very adept at tuning and you're very critical of it.
[800.51] Rupert (OMEGOOLIEBIRD): And you would notice kind of inconsistency with control reaction and stuff.
[805.51] Rupert (OMEGOOLIEBIRD): And that is the case with planes.
[807.51] Rupert (OMEGOOLIEBIRD): If your control linkages or the servos aren't up to the job, then there's going to be erratic movement that you're not putting into it.
[814.51] Rupert (OMEGOOLIEBIRD): You know, if the servos aren't strong enough, once you sort of go over a certain speed, the control will be less, you know, it will be inconsistent again.
[822.51] Frank: That's the other thing as well.
[825.51] Frank: You've got these really powerful servos and then you've got to have a control linkage that doesn't just bend and flex.
[833.51] Frank: What do you do for that?
[834.51] Frank: How do you make sure that you haven't you've actually getting the output of the servo into the control surface?
[841.51] Rupert (OMEGOOLIEBIRD): Physically test it.
[842.51] Rupert (OMEGOOLIEBIRD): I mean, hold the control surface and give the servo full power and just make sure everything, you know.
[848.51] Frank: But if you just got like massive hinges and massive control rod bits between your.
[853.51] Rupert (OMEGOOLIEBIRD): Yeah, it's nothing.
[855.51] Rupert (OMEGOOLIEBIRD): It's nothing huge, but it's all straight.
[858.51] Rupert (OMEGOOLIEBIRD): You know, there's nothing that is abandoned or anything like that.
[861.51] Rupert (OMEGOOLIEBIRD): It has got.
[862.51] Rupert (OMEGOOLIEBIRD): I'm just trying to think that the jet one with the planes are both the same.
[867.51] Rupert (OMEGOOLIEBIRD): One has a turbine engine on it.
[868.51] Rupert (OMEGOOLIEBIRD): One has electric motor on it.
[869.51] Rupert (OMEGOOLIEBIRD): And I've got slightly different linkages and servos in each one.
[872.51] Rupert (OMEGOOLIEBIRD): But but basically it's the same.
[874.51] Rupert (OMEGOOLIEBIRD): It's a carbon control horn bonded into the.
[877.51] Rupert (OMEGOOLIEBIRD): And on the jet, what I've actually done is the control rod, pushed it through the control horn, actually tapped a thread on the end of it and then wound a nut onto it.
[888.51] Rupert (OMEGOOLIEBIRD): So it's not a ball joint or anything like that.
[890.51] Rupert (OMEGOOLIEBIRD): It is just a rod going through the control link and through the horn and the nut on it.
[895.51] Rupert (OMEGOOLIEBIRD): And then I soldered the nut on afterwards.
[896.51] Rupert (OMEGOOLIEBIRD): So I actually I copied it from I saw a plane at Weston Park.
[901.51] Rupert (OMEGOOLIEBIRD): It was an F5 pile on plane or something.
[904.51] Rupert (OMEGOOLIEBIRD): And that's what they'd done.
[905.51] Rupert (OMEGOOLIEBIRD): They just got the control link straight through the horn with a nut on it.
[909.51] Rupert (OMEGOOLIEBIRD): And you can tighten it all up nicely and get the play out of it.
[911.51] Rupert (OMEGOOLIEBIRD): And there's enough movement for the kind of angles involved.
[914.51] Frank: So is that one of the other ones that you can hear from the other end of the Western part?
[919.51] Rupert (OMEGOOLIEBIRD): Yeah, yeah.
[923.51] Curry: So I must talk about the noise.
[925.51] Curry: After Mini Airshow, I wrote an article for this magazine, RC M&E.
[931.51] Curry: It's very traditional, this one.
[933.51] Curry: And in fact, they had a survey about their readers.
[936.51] Curry: And it's like the main readers, 30 rocks or sandals, are 61 to 70 years old.
[943.51] Curry: And then the other load of them are 51 to 60.
[946.51] Curry: So it's very much this magazine may not exist in a few years because they'll all be dead.
[951.51] Curry: But I wrote this article, and it was about...
[955.51] Curry: It's called Sympathy for the Devil, which wasn't my title.
[958.51] Curry: And it was about quads and plane people crossing over.
[963.51] Curry: And look, Tony, it's a picture of you. Do you remember that one?
[966.51] Curry: And we wrote about MA4.
[968.51] Curry: And the editor, after I wrote it, said,
[971.51] Curry: could you get some more opinion from somebody more in the sort of traditional model flying?
[977.51] Curry: And I talked to a guy called Ray Cox.
[981.51] Curry: Ray Cox was the chairman of the Spitfire Flying Club at Poppam,
[988.51] Curry: and something else, is he, Frank, as well?
[990.51] Frank: He's sort of the head of the era modelers, yeah.
[993.51] Curry: So he was a good guy to talk to, I thought,
[996.51] Curry: because I thought if he was going to be angry about quads and stuff,
[999.51] Curry: he'd tell us what his concerns were.
[1001.51] Curry: And he only had nice things to say about them.
[1004.51] Curry: But there was a paragraph he told me, and it didn't go in the magazine,
[1008.51] Curry: but here's what he said. See if you can guess who he's talking about.
[1011.51] Curry: He said, only a couple of concerns about the event,
[1014.51] Curry: which I've raised with Andrew and Mike Pearson.
[1016.51] Curry: I guess that's you, Frank. One.
[1019.51] Curry: But number two is we need additional litter bins. We'll ignore that bit.
[1022.51] Curry: Number one, use of the very high speed and noisy flying wing,
[1027.51] Curry: even with the 13-meter boundary by the camping zone,
[1030.51] Curry: any break of this model that speeds it achieve can be hazardous.
[1033.51] Curry: And the noise risks a complaint from our nearest neighbor,
[1036.51] Curry: although none was forthcoming. Who do you think he may have been talking about?
[1040.51] Curry: So, in fact, the whole thing of MA4 was, it's like,
[1046.51] Curry: oh, those quad people are okay, but that guy with the flying wing,
[1049.51] Curry: he's a danger.
[1051.51] Frank: Yeah, but bearing in mind, this is where we had an X-Class,
[1055.51] Frank: at least one X-Class flying around, we had...
[1058.51] Frank: Jets, all the turbines.
[1060.51] Frank: Yeah, we had the race course, the racetrack flying at the same time
[1070.51] Frank: as all the fixed-wing stuff going on.
[1072.51] Frank: We had the freestyle competition going on
[1078.51] Frank: and all that kind of stuff happening.
[1080.51] Frank: And no A-certs or B-certs for any of that kind of side of things.
[1086.51] Frank: And then, yeah, the one sort of bit that got the back up of these old boys.
[1092.51] Rupert (OMEGOOLIEBIRD): It was okay with a plane.
[1096.51] Rupert (OMEGOOLIEBIRD): Yeah, I took it to a...
[1099.51] Rupert (OMEGOOLIEBIRD): I took out Funjet to a model show in a place called Morton in Marsh,
[1103.51] Rupert (OMEGOOLIEBIRD): and it's a very old model film, one of the oldest in the country, I think.
[1107.51] Rupert (OMEGOOLIEBIRD): And I would say that most people are over 70 there.
[1110.51] Rupert (OMEGOOLIEBIRD): And I had been to this show before, and I said to Adele,
[1113.51] Rupert (OMEGOOLIEBIRD): come on, let's go there, and I'll take the Funjet, and I'll just see if I can fly it.
[1116.51] Rupert (OMEGOOLIEBIRD): And it was a fiver to pay.
[1118.51] Rupert (OMEGOOLIEBIRD): And I thought, go on, I'll give this a go in front of these old guys.
[1121.51] Rupert (OMEGOOLIEBIRD): And did a flight, and as I landed, somebody came up to me and said,
[1125.51] Rupert (OMEGOOLIEBIRD): you can't come back again with that.
[1129.51] Rupert (OMEGOOLIEBIRD): That's brilliant, though.
[1131.51] Tony: We had a complaint already.
[1133.51] Tony: And then just leave.
[1134.51] Rupert (OMEGOOLIEBIRD): Flew for one minute, and they'd already had a complaint
[1136.51] Rupert (OMEGOOLIEBIRD): from somebody that owned horses next door.
[1139.51] Rupert (OMEGOOLIEBIRD): Oh, well, I can see.
[1142.51] Curry: It is completely insane.
[1144.51] Curry: And it's mostly to do with the fact that it's a very small prop
[1147.51] Curry: spinning at sub-supersonic speed.
[1150.51] Curry: So one of my questions, as someone I'd like to go fast,
[1154.51] Curry: is that one thing you might think you do to make a plane go fast
[1158.51] Curry: is put a bigger prop on.
[1159.51] Curry: Because you think, oh, if I've got, say, a 1,000 kV motor
[1163.51] Curry: and it's turning a little prop, then if I put a big prop on,
[1166.51] Curry: it's going to go faster.
[1167.51] Curry: But that's not how it works, is it?
[1170.51] Rupert (OMEGOOLIEBIRD): No, I think there's two things, really.
[1173.51] Rupert (OMEGOOLIEBIRD): I'm not a scientist, and I have no formal training.
[1176.51] Rupert (OMEGOOLIEBIRD): So anything that comes out of my mouth, take with a pinch of salt.
[1179.51] Rupert (OMEGOOLIEBIRD): But basically, as I understand it,
[1181.51] Rupert (OMEGOOLIEBIRD): that you've got thrust speed and you've got thrust volume,
[1184.51] Rupert (OMEGOOLIEBIRD): and you've got drag on the plane.
[1186.51] Rupert (OMEGOOLIEBIRD): So it's a kind of balance between all three of those.
[1188.51] Rupert (OMEGOOLIEBIRD): You need enough thrust volume to overcome the drag so that,
[1191.51] Rupert (OMEGOOLIEBIRD): you know, no matter how fast the gas comes out the back,
[1194.51] Rupert (OMEGOOLIEBIRD): if there's not enough of it in volume,
[1196.51] Rupert (OMEGOOLIEBIRD): it just won't push the plane past the drag.
[1199.51] Rupert (OMEGOOLIEBIRD): It's finding the right size prop for the airframe,
[1202.51] Rupert (OMEGOOLIEBIRD): spinning it as fast as you can get to a point,
[1206.51] Rupert (OMEGOOLIEBIRD): and then using it, dialing the speed in with the pitch, basically.
[1210.51] Rupert (OMEGOOLIEBIRD): So it isn't just about a bigger prop.
[1212.51] Rupert (OMEGOOLIEBIRD): It's about finding a prop that, when the,
[1215.51] Rupert (OMEGOOLIEBIRD): so you're going to try and go at 200mph,
[1217.51] Rupert (OMEGOOLIEBIRD): you need a pitch speed of, say, 300mph,
[1220.51] Rupert (OMEGOOLIEBIRD): and then in the volume to push that plane at 200mph.
[1224.51] Rupert (OMEGOOLIEBIRD): I don't know if I'm making sense, really.
[1227.51] Tony: I understand what you're saying.
[1229.51] Rupert (OMEGOOLIEBIRD): It's kind of hard to explain.
[1230.51] Rupert (OMEGOOLIEBIRD): But you can see from the results that sometimes
[1233.51] Rupert (OMEGOOLIEBIRD): that you've got an access of thrust speed,
[1236.51] Rupert (OMEGOOLIEBIRD): but the plane isn't going any faster.
[1238.51] Rupert (OMEGOOLIEBIRD): So it means that there's not enough area.
[1240.51] Rupert (OMEGOOLIEBIRD): So you put more area on and then sometimes you can see that
[1243.51] Rupert (OMEGOOLIEBIRD): the plane's almost going at the pitch speed of the propeller.
[1245.51] Rupert (OMEGOOLIEBIRD): So it's almost going at the same,
[1247.51] Rupert (OMEGOOLIEBIRD): which means you could get away with more pitch speed.
[1249.51] Rupert (OMEGOOLIEBIRD): So it's just a balance.
[1251.51] Tony: So when you're running success on that,
[1255.51] Tony: what size prop are you running and what KV is the motor?
[1259.51] Rupert (OMEGOOLIEBIRD): So I always try to run a, basically,
[1262.51] Rupert (OMEGOOLIEBIRD): the only commercially available props really,
[1264.51] Rupert (OMEGOOLIEBIRD): a square pitch, aren't they?
[1265.51] Rupert (OMEGOOLIEBIRD): So six, six, six and a half by six and a half,
[1267.51] Rupert (OMEGOOLIEBIRD): seven by seven.
[1269.51] Rupert (OMEGOOLIEBIRD): So I was using those kind of props before
[1273.51] Rupert (OMEGOOLIEBIRD): and now I use a seven by 14 prop.
[1278.51] Rupert (OMEGOOLIEBIRD): So I forgot what your question was there.
[1280.51] Tony: And what KV was the motor on this success?
[1284.51] Rupert (OMEGOOLIEBIRD): So I've run two different KV's at success,
[1286.51] Rupert (OMEGOOLIEBIRD): 1900 KV and 2700.
[1290.51] Rupert (OMEGOOLIEBIRD): What I've learned is the main thing to avoid
[1292.51] Rupert (OMEGOOLIEBIRD): seems to be supersonic prop tips
[1294.51] Rupert (OMEGOOLIEBIRD): because it just makes a lot of noise
[1296.51] Rupert (OMEGOOLIEBIRD): and you lose a lot of power.
[1298.51] Stephen: How do you avoid that?
[1299.51] Stephen: That was going to be my question.
[1301.51] Stephen: How do you know when you're hitting supersonic speeds
[1303.51] Stephen: and how to choose a prop that avoids that?
[1306.51] Rupert (OMEGOOLIEBIRD): I guess you can calculate it or do an RPM measurement,
[1309.51] Rupert (OMEGOOLIEBIRD): but basically you can hear it,
[1310.51] Rupert (OMEGOOLIEBIRD): the difference between something that's supersonic
[1312.51] Rupert (OMEGOOLIEBIRD): and something that's below it is when it's coming,
[1315.51] Rupert (OMEGOOLIEBIRD): with the supersonic prop tips,
[1316.51] Rupert (OMEGOOLIEBIRD): when the plane's coming towards you,
[1317.51] Rupert (OMEGOOLIEBIRD): you can hear the echoes of that disc of pressure wave
[1321.51] Rupert (OMEGOOLIEBIRD): coming off the prop as the plane's coming towards you
[1323.51] Rupert (OMEGOOLIEBIRD): and that disc has got some hedges.
[1325.51] Rupert (OMEGOOLIEBIRD): Yeah, exactly that hedges and trees.
[1327.51] Rupert (OMEGOOLIEBIRD): That echo is loud in the plane.
[1328.51] Rupert (OMEGOOLIEBIRD): So you almost hear those echoes coming before you hit a plane.
[1331.51] Rupert (OMEGOOLIEBIRD): If you said, I mean the noise from the front of the plane
[1333.51] Rupert (OMEGOOLIEBIRD): is not as much as it's coming down below it in this disc.
[1337.51] Rupert (OMEGOOLIEBIRD): So it's pretty easy to hear this.
[1338.51] Rupert (OMEGOOLIEBIRD): I've got some good examples on my YouTube channel
[1341.51] Rupert (OMEGOOLIEBIRD): of when it was...
[1343.51] Rupert (OMEGOOLIEBIRD): Is there any way I can link a video?
[1345.51] Rupert (OMEGOOLIEBIRD): You could link a video to show,
[1346.51] Rupert (OMEGOOLIEBIRD): because it's probably the best looking sound.
[1348.51] Jack: Yeah, sure.
[1349.51] Jack: What video do you want?
[1351.51] Rupert (OMEGOOLIEBIRD): It's called 264 mile an hour overhead or something.
[1355.51] Rupert (OMEGOOLIEBIRD): I think it's like 10 videos back or something.
[1358.51] Jack: 264R plane sound?
[1361.51] Jack: Amazing sound.
[1362.51] Rupert (OMEGOOLIEBIRD): Yeah, that's the one, yeah.
[1364.51] Rupert (OMEGOOLIEBIRD): That gives you a really good time
[1365.51] Rupert (OMEGOOLIEBIRD): for these echoes coming.
[1367.51] Stephen: I had a look on your RC groups, Ted,
[1369.51] Stephen: and it seems that you're ordering rather specialist propeller blades
[1373.51] Stephen: one at a time now and clamping those onto the hub yourself, right?
[1376.51] Rupert (OMEGOOLIEBIRD): Yeah, that's it.
[1377.51] Rupert (OMEGOOLIEBIRD): Yeah, so the limitation comes obviously with a 7x7,
[1381.51] Rupert (OMEGOOLIEBIRD): I can't spin it any faster because it goes supersonic.
[1384.51] Rupert (OMEGOOLIEBIRD): So I've run out of thrust speed that I can get.
[1387.51] Rupert (OMEGOOLIEBIRD): So the only way to get more is to go more in pitch.
[1390.51] Rupert (OMEGOOLIEBIRD): So now I'm using a 7x14,
[1393.51] Rupert (OMEGOOLIEBIRD): and obviously they're not commercially available.
[1397.51] Rupert (OMEGOOLIEBIRD): So there's guys in Germany that make those speed planes over there.
[1401.51] Rupert (OMEGOOLIEBIRD): So I've kind of started to buy those now.
[1404.51] Rupert (OMEGOOLIEBIRD): They're like 50 quid a prop.
[1406.51] Rupert (OMEGOOLIEBIRD): So for two, it's 50 quid plus the hub and everything.
[1409.51] Rupert (OMEGOOLIEBIRD): So you've got to look after them.
[1413.51] Rupert (OMEGOOLIEBIRD): Pitches go up to in 7 inch, about 14 pitches,
[1417.51] Rupert (OMEGOOLIEBIRD): about as much as I could find.
[1418.51] Rupert (OMEGOOLIEBIRD): But the next project I'm going to build,
[1421.51] Rupert (OMEGOOLIEBIRD): hopefully I'm looking at a 10x31.
[1424.51] Rupert (OMEGOOLIEBIRD): It's a lot more than a 10x31,
[1427.51] Rupert (OMEGOOLIEBIRD): and 15 or 20 kilowatts to drive it.
[1430.51] Rupert (OMEGOOLIEBIRD): So the thing with the over-square pops is
[1432.51] Rupert (OMEGOOLIEBIRD): the amount of power it takes to drive them is really crazy.
[1436.51] Stephen: 15 to 20 kilowatts.
[1438.51] Stephen: So you're already on an APD 200A
[1440.51] Stephen: and you're pushing 14S through it
[1442.51] Stephen: off a custom 2A power pack that you built.
[1445.51] Stephen: How the hell are you going to go up from that in kilowatts?
[1450.51] Rupert (OMEGOOLIEBIRD): 20S, 24S or something like that.
[1452.51] Rupert (OMEGOOLIEBIRD): So again, I want to use small packs, but a lot of them.
[1455.51] Rupert (OMEGOOLIEBIRD): So in the next project,
[1457.51] Rupert (OMEGOOLIEBIRD): it's going to be essentially just a wing, no fuselage,
[1460.51] Rupert (OMEGOOLIEBIRD): and the cells are going to be laid out in the wing
[1463.51] Rupert (OMEGOOLIEBIRD): to try and just reduce any frontal area possible.
[1466.51] Rupert (OMEGOOLIEBIRD): So make the thing as thin as possible.
[1467.51] Rupert (OMEGOOLIEBIRD): So I'll split probably 1,800 mAh packs into two asses,
[1472.51] Rupert (OMEGOOLIEBIRD): lay them out on the wing and have 24 cells in total.
[1476.51] Jack: Sorry, I'm just downloading your video.
[1479.51] Tony: So load the jump then, 14 straight to...
[1483.51] Tony: Why are you downloading it?
[1487.51] Stephen: How do you lay them out for charging?
[1489.51] Stephen: Do you have them just as twos for charging or what?
[1492.51] Rupert (OMEGOOLIEBIRD): No, so that's an interesting question, actually.
[1494.51] Rupert (OMEGOOLIEBIRD): It's quite a difficult problem to overcome,
[1496.51] Rupert (OMEGOOLIEBIRD): because with, say, 14S,
[1498.51] Rupert (OMEGOOLIEBIRD): you have to have a lot of interconnects in the battery
[1500.51] Rupert (OMEGOOLIEBIRD): to bring all those cells together,
[1501.51] Rupert (OMEGOOLIEBIRD): so there'd be quite a lot of resistance in the chain.
[1503.51] Rupert (OMEGOOLIEBIRD): So what I do is I solder the whole pack together,
[1506.51] Rupert (OMEGOOLIEBIRD): leave the balance leads on each cell,
[1508.51] Rupert (OMEGOOLIEBIRD): and I've got individual chargers,
[1511.51] Rupert (OMEGOOLIEBIRD): which I run off an individual lipo each,
[1513.51] Rupert (OMEGOOLIEBIRD): so that none of them are connected.
[1515.51] Rupert (OMEGOOLIEBIRD): There's no common earth across the chargers.
[1517.51] Rupert (OMEGOOLIEBIRD): And then each charger can charge its own pack
[1520.51] Rupert (OMEGOOLIEBIRD): within that 14S block without affecting any other.
[1524.51] Rupert (OMEGOOLIEBIRD): So I just charge it through the balance leads,
[1525.51] Rupert (OMEGOOLIEBIRD): balance charge all the cells.
[1527.51] Rupert (OMEGOOLIEBIRD): And so I can go to any voltage doing that, really.
[1529.51] Rupert (OMEGOOLIEBIRD): I've had 10 chargers at four cells per charger or something.
[1535.51] Curry: Oh, yeah, I seem to remember your old charging thing.
[1538.51] Curry: Was it you that had the loads and loads of cheap chargers?
[1541.51] Curry: Yeah.
[1543.51] Curry: They're still working, yeah.
[1545.51] Curry: Multi-charges.
[1547.51] Curry: Are you ready for this?
[1549.51] Rupert (OMEGOOLIEBIRD): Yeah, you'll hear the echoes.
[1551.51] Rupert (OMEGOOLIEBIRD): Just about now, start to come.
[1564.97] Stephen: That battery's dead. Next battery.
[1567.97] Stephen: What was that?
[1569.97] Stephen: Empty, but on fire.
[1571.97] Tony: So what battery and speed was that one?
[1574.97] Rupert (OMEGOOLIEBIRD): That was about 260 miles an hour,
[1578.97] Rupert (OMEGOOLIEBIRD): I think 410 kilometers an hour or something.
[1581.97] Rupert (OMEGOOLIEBIRD): That was 6S, just with the 7.7 prop.
[1583.97] Rupert (OMEGOOLIEBIRD): So you can hear the supersonic tips there.
[1585.97] Rupert (OMEGOOLIEBIRD): It's everything I can give to a 7.7 prop, really.
[1589.97] Curry: You can see that the FPV picture must have improved,
[1593.97] Curry: because I remember just a few years back,
[1595.97] Curry: you were using trackers,
[1597.97] Curry: because when you were testing speed,
[1599.97] Curry: and obviously, if you can see it, it looks speeded up,
[1601.97] Curry: because all these fields are just flowing past,
[1603.97] Curry: and because it was going out of range so quickly,
[1606.97] Curry: Roop's tracker was just like,
[1608.97] Curry: you could just see this big helical trying to follow it.
[1611.97] Curry: This is speed because it was so quick.
[1615.97] Rupert (OMEGOOLIEBIRD): Yeah, actually, I just use a pair of goggles,
[1618.97] Rupert (OMEGOOLIEBIRD): a pair of Fat Shark goggles with a Fat Shark 1.3 receiver
[1621.97] Rupert (OMEGOOLIEBIRD): in them with a cloverleaf on it, that's all I use,
[1624.97] Rupert (OMEGOOLIEBIRD): because there's the least failure points in that.
[1626.97] Rupert (OMEGOOLIEBIRD): If I've got a ground station with a tracker,
[1628.97] Rupert (OMEGOOLIEBIRD): any one failure in that system
[1630.97] Rupert (OMEGOOLIEBIRD): could leave me without a connection,
[1632.97] Rupert (OMEGOOLIEBIRD): so I just fly to the limits with that, and it's fine.
[1637.97] Rupert (OMEGOOLIEBIRD): There's always a loss of picture,
[1638.97] Rupert (OMEGOOLIEBIRD): because I use vertically polarized antennas
[1641.97] Rupert (OMEGOOLIEBIRD): in the fins of the plane,
[1642.97] Rupert (OMEGOOLIEBIRD): so when it turns back towards you,
[1644.97] Rupert (OMEGOOLIEBIRD): there's a no on the end of the aerial,
[1645.97] Rupert (OMEGOOLIEBIRD): so I always expect that when it turns out,
[1647.97] Rupert (OMEGOOLIEBIRD): I'm going to lose the picture,
[1648.97] Rupert (OMEGOOLIEBIRD): but it comes back because it levels off.
[1652.97] Stephen: Is it difficult to fit the larger antennas in the aircraft?
[1656.97] Stephen: They're actually structural in the plane
[1657.97] Stephen: instead of protruding out of it?
[1659.97] Rupert (OMEGOOLIEBIRD): That's it, yeah.
[1660.97] Rupert (OMEGOOLIEBIRD): They're built into the fins,
[1661.97] Rupert (OMEGOOLIEBIRD): so I cut into the bottom of the fins
[1663.97] Rupert (OMEGOOLIEBIRD): and slotted them up in there,
[1664.97] Rupert (OMEGOOLIEBIRD): so there's nothing sticking outside the plane.
[1666.97] Rupert (OMEGOOLIEBIRD): Like, drag is the number one battle, you know.
[1671.97] Rupert (OMEGOOLIEBIRD): I can't remember what,
[1672.97] Rupert (OMEGOOLIEBIRD): it goes up by a square of four or something to go, you know.
[1678.97] Rupert (OMEGOOLIEBIRD): It's not a square roof,
[1680.97] Rupert (OMEGOOLIEBIRD): but you need four times as much power to go a bit faster.
[1684.97] Curry: I think it would be interesting to see
[1686.97] Curry: what would happen to a 1.3 helical
[1688.97] Curry: if you put it on that plane.
[1689.97] Curry: It'd look like some tree that was caught in a gale
[1691.97] Curry: where it'd come just bent over in its little point.
[1695.97] Rupert (OMEGOOLIEBIRD): I put it on the rear hatch,
[1697.97] Rupert (OMEGOOLIEBIRD): because I had a meltdown last time,
[1699.97] Rupert (OMEGOOLIEBIRD): it actually damaged the rear hatch a bit,
[1700.97] Rupert (OMEGOOLIEBIRD): and I wasn't happy with how it's flipping down,
[1702.97] Rupert (OMEGOOLIEBIRD): so I cleaned it with alcohol,
[1704.97] Rupert (OMEGOOLIEBIRD): and I put some sellotape on it,
[1706.97] Rupert (OMEGOOLIEBIRD): and I tell you, the sellotape was stuck down good, real good,
[1709.97] Rupert (OMEGOOLIEBIRD): and when I landed the plane, the tape wasn't there anymore, so...
[1715.97] Stephen: Speed.
[1717.97] Stephen: Speed cleaner.
[1720.97] Frank: Oh, my God.
[1721.97] Frank: This episode was recorded in front of a live online audience,
[1724.97] Frank: downloaded and edited to make sense when it played audio only,
[1728.97] Frank: censored to please the iTunes people,
[1730.97] Frank: hosted on the internet,
[1731.97] Frank: forwarded through to your podcast provider,
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[1734.97] Frank: and is now playing in your ears,
[1736.97] Frank: all thanks to our Patreons.
[1739.97] Frank: Consider joining them, and you'll also get other online benefits.
[1742.97] Frank: Find out more at Patreon.com forward slash Let's Drone Out.
[1747.97] Jack: I wonder if the Menace Aeropod would survive you.
[1753.97] Jack: Are you aware of these?
[1755.97] Stephen: That would only increase his drag, though, that's the thing.
[1758.97] Stephen: He's already built them into the face.
[1760.97] Jack: They're meant to be aerodynamic.
[1765.97] Rupert (OMEGOOLIEBIRD): It's all about not wasting frontal area,
[1767.97] Rupert (OMEGOOLIEBIRD): so any space that you've got spare, if you can put something in that,
[1770.97] Rupert (OMEGOOLIEBIRD): rather than having it sticking out.
[1771.97] Stephen: It's like a bubble that sticks on the airframe, I think,
[1774.97] Stephen: the one that Jack's talking about.
[1776.97] Rupert (OMEGOOLIEBIRD): If you can put it on the airframe, it's definitely better to.
[1778.97] Rupert (OMEGOOLIEBIRD): You know, it makes a huge difference.
[1780.97] Rupert (OMEGOOLIEBIRD): Absolutely, absolutely huge.
[1783.97] Frank: Have you got to the point where you're, like,
[1785.97] Frank: trying different surface treatments, like waxing it or something,
[1788.97] Frank: to see if it will reduce the skin drag of it?
[1792.97] Rupert (OMEGOOLIEBIRD): No, not really.
[1793.97] Rupert (OMEGOOLIEBIRD): I'm just doing kind of big leaps at the moment, really.
[1795.97] Rupert (OMEGOOLIEBIRD): There's no need to kind of go into the same details, really.
[1798.97] Rupert (OMEGOOLIEBIRD): It's just keep going up in power and stuff until I get to,
[1801.97] Rupert (OMEGOOLIEBIRD): well, I think, the limit.
[1802.97] Rupert (OMEGOOLIEBIRD): And then I guess start really trying to optimize it from there.
[1805.97] Rupert (OMEGOOLIEBIRD): But I think, you know, I've been having a chat with a German motor builder
[1810.97] Rupert (OMEGOOLIEBIRD): who kind of dismissed my project pretty quickly.
[1812.97] Rupert (OMEGOOLIEBIRD): But I really did get to try and go 700 kilometers an hour.
[1818.97] Rupert (OMEGOOLIEBIRD): And he laughed, didn't think it was a very good idea.
[1821.97] Rupert (OMEGOOLIEBIRD): He suggested a way of doing it, but I didn't really want to get on that route.
[1825.97] Jack: What? Rocket motors?
[1827.97] Rupert (OMEGOOLIEBIRD): I think it can be done.
[1829.97] Rupert (OMEGOOLIEBIRD): It's just about drag.
[1831.97] Rupert (OMEGOOLIEBIRD): It's about getting, you know, it's not always just about adding more power.
[1835.97] Rupert (OMEGOOLIEBIRD): There comes a point where, you know, you've got to just try and get the plane
[1839.97] Rupert (OMEGOOLIEBIRD): as small as possible with as much power in it as possible.
[1842.97] Rupert (OMEGOOLIEBIRD): So that balance of it being able to land, really, that's the only limit,
[1845.97] Rupert (OMEGOOLIEBIRD): is can you land it?
[1846.97] Rupert (OMEGOOLIEBIRD): You know, the stall speed goes up and up to the point where
[1849.97] Rupert (OMEGOOLIEBIRD): I'm landing at a full-size airfield and it's a 600-meter runway
[1852.97] Rupert (OMEGOOLIEBIRD): and it looks small when you're coming in.
[1854.97] Rupert (OMEGOOLIEBIRD): It does, you know.
[1856.97] Rupert (OMEGOOLIEBIRD): So it glides the stabilised approach.
[1860.97] Rupert (OMEGOOLIEBIRD): So I've kind of worked out how far away it's best.
[1863.97] Rupert (OMEGOOLIEBIRD): And it's about a kilometer at 100 kilometers an hour at 30 meters altitude.
[1868.97] Rupert (OMEGOOLIEBIRD): And it will glide in from there.
[1869.97] Rupert (OMEGOOLIEBIRD): So it'll be a kilometer at 30 meters altitude at 100 kilometers an hour
[1874.97] Rupert (OMEGOOLIEBIRD): before it's down to 60 where it stalls.
[1876.97] Rupert (OMEGOOLIEBIRD): So that's the amount of energy of attention it's got.
[1879.97] Stephen: So if you're looking at 700 miles an hour, can you really just eyeball?
[1883.97] Stephen: Oh, kilometers, okay.
[1885.97] Stephen: That's not as hairy then.
[1887.97] Stephen: I was just wondering, what realm do you think, well,
[1890.97] Stephen: this is about time to do some fluid simulations
[1893.97] Stephen: and about time to go and buy my own personal mini wind tunnel.
[1897.97] Stephen: How long can you take it just eyeballing it?
[1900.97] Rupert (OMEGOOLIEBIRD): Quite a long way still, I think. It seems to be going up.
[1903.97] Rupert (OMEGOOLIEBIRD): I think what I need to do at this point, though, is kind of
[1905.97] Rupert (OMEGOOLIEBIRD): confirm the numbers a bit better because there is some doubt,
[1908.97] Rupert (OMEGOOLIEBIRD): certainly amongst the German speed community, as to whether it's legitimate
[1912.97] Rupert (OMEGOOLIEBIRD): because it's a GPS reading and they're saying I dived and things.
[1915.97] Rupert (OMEGOOLIEBIRD): So the next flight is about...
[1918.97] Rupert (OMEGOOLIEBIRD): How much are you really getting?
[1920.97] Rupert (OMEGOOLIEBIRD): They dive in the middle out and they fly through a 200 meter course.
[1924.97] Rupert (OMEGOOLIEBIRD): So I've got to get a reading across 200 meters using a couple of cameras
[1928.97] Rupert (OMEGOOLIEBIRD): and some Doppler readings and things just to get, just to put that to bed, really.
[1931.97] Rupert (OMEGOOLIEBIRD): Because I don't think the forward Doppler reading is always within...
[1934.97] Rupert (OMEGOOLIEBIRD): Because I'm flying a straight line, I'm not turning.
[1937.97] Rupert (OMEGOOLIEBIRD): I think everybody's used to GPS data loggers and when you fly a line of sight,
[1941.97] Rupert (OMEGOOLIEBIRD): obviously the GPS is getting a bad vector all the time and bad signal.
[1945.97] Rupert (OMEGOOLIEBIRD): So the readings are pretty corrupt.
[1947.97] Rupert (OMEGOOLIEBIRD): But when doing the kind of runs I'm doing, I'm in a straight line for 1.5km.
[1952.97] Rupert (OMEGOOLIEBIRD): And the reading is stable. It's going up pretty stable.
[1955.97] Rupert (OMEGOOLIEBIRD): There's no wild numbers.
[1957.97] Rupert (OMEGOOLIEBIRD): So for me, it's accurate enough.
[1959.97] Rupert (OMEGOOLIEBIRD): But I think I need to prove it on the next flight.
[1964.97] Jack: It's going to say 700 miles an hour. You're going to need heat shielding.
[1968.97] Jack: Kilometres.
[1969.97] Jack: Kilometres.
[1973.97] Tony: Everyone can hear the screaming in the background.
[1975.97] Tony: There's no kids. That's his batteries.
[1981.97] Jack: I can't see.
[1982.97] Jack: Sorry, Kerry, I cut you off.
[1984.97] Curry: Oh, I forgot what I was saying.
[1985.97] Curry: Oh yeah, I'd say the Germans are such a strict list for rules,
[1988.97] Curry: unless it's the rule about not putting your towels on the sunbeds, of course.
[1993.97] Rupert (OMEGOOLIEBIRD): I don't want to sympathise with the Germans.
[1995.97] Rupert (OMEGOOLIEBIRD): Without them, I couldn't do it.
[1996.97] Rupert (OMEGOOLIEBIRD): It's their propellers and their knowledge that I'm feeding off really.
[1999.97] Rupert (OMEGOOLIEBIRD): So I can't design the propellers.
[2001.97] Curry: I guess some of the problem is now just getting the right parts
[2004.97] Curry: because you're such at the sort of edge of what people are doing.
[2009.97] Curry: It's not like we were saying this before.
[2011.97] Curry: It's like if you want to build like a 6S or a 4S regular quad, it's easy.
[2015.97] Curry: If you want to build X-Class like Tony flies,
[2018.97] Curry: you're very limited on the amount of motors that are there,
[2021.97] Curry: the amount of ESCs there, and then it's big money to do it.
[2024.97] Stephen: He's using the top-end X-Class APD 200A and 14S stuff,
[2029.97] Stephen: and then he's talking about going up from that to a 24S,
[2033.97] Stephen: and that's not even X-Class kit anymore.
[2036.97] Stephen: That's like above what an X-Class would use.
[2040.97] Rupert (OMEGOOLIEBIRD): Yeah, it's still APD.
[2042.97] Rupert (OMEGOOLIEBIRD): It's just the APD do it.
[2045.97] Rupert (OMEGOOLIEBIRD): I think it's a similar size, but it's in an aluminium case,
[2048.97] Rupert (OMEGOOLIEBIRD): and they do 400A, 16S, or I think it's 24S, 200A or something.
[2056.97] Stephen: Wow, okay. I hadn't seen that part. Impressive.
[2059.97] Stephen: Yeah.
[2061.97] Rupert (OMEGOOLIEBIRD): But again, it's all off-the-shelf stuff,
[2063.97] Rupert (OMEGOOLIEBIRD): so I'm living off other people's developments, really.
[2066.97] Rupert (OMEGOOLIEBIRD): I'm not making the motor, I'm not making ESC, I'm not making the prop,
[2069.97] Rupert (OMEGOOLIEBIRD): I'm not making the plane, any of that.
[2071.97] Rupert (OMEGOOLIEBIRD): I'm just putting together stuff that's off the shelf.
[2075.97] Stephen: The bit that really impresses me is you're doing all this totally manual.
[2079.97] Stephen: There's no flight controller, there's no ocean.
[2082.97] Stephen: Please just fly in a circle while I perspire and grab a glass of water.
[2088.97] Stephen: You're on the sticks all the time, and if you fail, the plane fails, right?
[2094.97] Rupert (OMEGOOLIEBIRD): Yeah, for me, it's the other way around.
[2097.97] Rupert (OMEGOOLIEBIRD): It's very important that the plane doesn't fail,
[2099.97] Rupert (OMEGOOLIEBIRD): so the less I can have in the system,
[2101.97] Rupert (OMEGOOLIEBIRD): that's the reason for the goggles with the simple system.
[2104.97] Rupert (OMEGOOLIEBIRD): I've seen more crashes with flight controllers
[2106.97] Rupert (OMEGOOLIEBIRD): than I've seen of people just manually crashing a plane.
[2109.97] Rupert (OMEGOOLIEBIRD): I've seen all sorts go wrong.
[2111.97] Rupert (OMEGOOLIEBIRD): Also, there's dynamics in the speed.
[2114.97] Rupert (OMEGOOLIEBIRD): It's going to go from a stall speed of 70km an hour
[2117.97] Rupert (OMEGOOLIEBIRD): to 500km an hour at the top.
[2119.97] Rupert (OMEGOOLIEBIRD): So where would you set the gains when you wanted it to take over?
[2123.97] Rupert (OMEGOOLIEBIRD): Because if it pulled the gains, it needed, say, 200km an hour.
[2127.97] Rupert (OMEGOOLIEBIRD): If it pulled that much Elibon in at 500km an hour,
[2130.97] Rupert (OMEGOOLIEBIRD): it would just fold up.
[2132.97] Rupert (OMEGOOLIEBIRD): So it would be more of a risk to have a flight controller.
[2137.97] Stephen: It'd be complex to tune.
[2139.97] Rupert (OMEGOOLIEBIRD): Very.
[2140.97] Rupert (OMEGOOLIEBIRD): Well, I wouldn't get any chances to tune it.
[2142.97] Rupert (OMEGOOLIEBIRD): That's the other thing.
[2143.97] Rupert (OMEGOOLIEBIRD): Every flight has got to be a wreck or something
[2146.97] Rupert (OMEGOOLIEBIRD): because the battery is only going to last a couple of three flights,
[2149.97] Rupert (OMEGOOLIEBIRD): so I don't want it to go wasted.
[2151.97] Jack: Well, you have to throw them away after...
[2153.97] Rupert (OMEGOOLIEBIRD): No, I'm about setting the top speed,
[2155.97] Rupert (OMEGOOLIEBIRD): so obviously if the battery's not performing as well as it could do,
[2158.97] Rupert (OMEGOOLIEBIRD): it's not worth it really, so keep them fresh.
[2163.97] Rupert (OMEGOOLIEBIRD): And I heat them up before I go,
[2165.97] Rupert (OMEGOOLIEBIRD): so I heat them up on a hot water bottle in the van before I go,
[2168.97] Rupert (OMEGOOLIEBIRD): and that makes a big difference in performance.
[2170.97] Rupert (OMEGOOLIEBIRD): Sensible.
[2171.97] Frank: Do you have like a beta frame that you just kind of...
[2174.97] Frank: As in like a runabout that you just fly for fun
[2179.97] Frank: without worrying about speed records, or is it that is what you do?
[2184.97] Rupert (OMEGOOLIEBIRD): The one that Wayne saw is the one that I fly sort of just for a life, really.
[2188.97] Rupert (OMEGOOLIEBIRD): The slow one.
[2190.97] Rupert (OMEGOOLIEBIRD): Yeah, yeah. It's just over 100 miles an hour slow, so...
[2194.97] Rupert (OMEGOOLIEBIRD): I don't know if I could fly this 14S one line of sight, to be quite honest.
[2199.97] Rupert (OMEGOOLIEBIRD): I think it would be a real handful trying to land something from a kilometre away
[2203.97] Rupert (OMEGOOLIEBIRD): at 30 meters altitude.
[2205.97] Rupert (OMEGOOLIEBIRD): Especially when it's only like two foot wide.
[2208.97] Rupert (OMEGOOLIEBIRD): It would be quite difficult.
[2209.97] Rupert (OMEGOOLIEBIRD): But, you know, ultimately I would have to if there was an emergency,
[2212.97] Rupert (OMEGOOLIEBIRD): so, you know, I'd give it a go.
[2215.97] Curry: But these aren't the only FPV craft you've flown,
[2217.97] Curry: and I've seen some lovely ones.
[2218.97] Curry: I think a lot of people would have seen your awesome Spitfire videos.
[2222.97] Curry: You've got some...
[2223.97] Curry: Although that Spitfire externally looked really beaten up,
[2226.97] Curry: it looked gorgeous from the inside cockpit view,
[2229.97] Curry: and I think it exploded.
[2230.97] Curry: And then was it one called the Magnum, a real slow flyer?
[2233.97] Curry: Yeah, yeah.
[2234.97] Curry: That you used to take around sort of just car parks and random places.
[2238.97] Curry: Roop's done the sort of things that we might do sort of like bandoing on quads,
[2242.97] Curry: but just with planes instead, which is nice and slow flying.
[2246.97] Curry: Because I remember I said to you,
[2248.97] Curry: oh, this looks good to get.
[2249.97] Curry: Is it any good in the wind?
[2250.97] Curry: And you said, no.
[2251.97] Curry: No.
[2252.97] Curry: If someone breathes, it's like, forget it.
[2254.97] Rupert (OMEGOOLIEBIRD): But on those days where it's right for that,
[2256.97] Rupert (OMEGOOLIEBIRD): it is the most fun you can have, honestly.
[2258.97] Rupert (OMEGOOLIEBIRD): It can put it any way you like, and it's just flexible.
[2261.97] Rupert (OMEGOOLIEBIRD): You can just fire it through gaps and it'll matter if it hits it.
[2264.97] Rupert (OMEGOOLIEBIRD): They're good fun.
[2265.97] Rupert (OMEGOOLIEBIRD): The Magnum's up.
[2267.97] Rupert (OMEGOOLIEBIRD): There's many different thrills you can have, isn't there?
[2269.97] Rupert (OMEGOOLIEBIRD): You can have a thrill at 10 miles an hour,
[2271.97] Rupert (OMEGOOLIEBIRD): and it's a different thrill at 300 miles an hour.
[2274.97] Rupert (OMEGOOLIEBIRD): It's very short and panicky.
[2278.97] Rupert (OMEGOOLIEBIRD): It's kind of over before you know it.
[2281.97] Jack: Why do you do it to yourself?
[2284.97] Rupert (OMEGOOLIEBIRD): I don't know if I can call it fun at that point.
[2287.97] Rupert (OMEGOOLIEBIRD): It really is exciting, but I don't know if it's fun in the same way
[2290.97] Rupert (OMEGOOLIEBIRD): that just chucking a plane about is.
[2293.97] Stephen: What sort of range do you get off the 1.3 gig setup?
[2296.97] Stephen: Is it problematic at all, or is it fine for the runs you do?
[2300.97] Rupert (OMEGOOLIEBIRD): The range, yeah.
[2301.97] Rupert (OMEGOOLIEBIRD): It's so happily to two or three kilometers.
[2304.97] Rupert (OMEGOOLIEBIRD): One of the things I do with any of the speed planes before I fly them
[2307.97] Rupert (OMEGOOLIEBIRD): is a physical range test.
[2308.97] Rupert (OMEGOOLIEBIRD): We go at our local model club.
[2310.97] Rupert (OMEGOOLIEBIRD): There's a hill that's three kilometers away,
[2312.97] Rupert (OMEGOOLIEBIRD): so we take the plane up on the hill
[2314.97] Rupert (OMEGOOLIEBIRD): and have the transmitter and the goggles on the ground
[2316.97] Rupert (OMEGOOLIEBIRD): and do range checks, turning the plane upside down
[2318.97] Rupert (OMEGOOLIEBIRD): and everything to make sure it all works
[2320.97] Rupert (OMEGOOLIEBIRD): and it's fine at three kilometers.
[2321.97] Rupert (OMEGOOLIEBIRD): I've not been out that far on a run yet.
[2325.97] Stephen: I think you can just cross the 1.5 for the control link.
[2329.97] Rupert (OMEGOOLIEBIRD): What's that, sorry?
[2330.97] Stephen: Crossfire or something for the control link on 900?
[2333.97] Rupert (OMEGOOLIEBIRD): Easy, UHF.
[2335.97] Stephen: Oh, wow.
[2337.97] Curry: From the old days.
[2339.97] Rupert (OMEGOOLIEBIRD): It's got the most penetration, the most range.
[2343.97] Rupert (OMEGOOLIEBIRD): Only gold.
[2344.97] Rupert (OMEGOOLIEBIRD): Yeah, it's simple.
[2346.97] Curry: A lot of people complain that 4.3.3 is a bit technical
[2351.97] Curry: and if you've got your antennas wrong, you can cock it up.
[2356.97] Curry: But it's working if it's not broken.
[2359.97] Curry: Don't try and fix it.
[2360.97] Rupert (OMEGOOLIEBIRD): If you get it right, it works really well, yeah.
[2362.97] Rupert (OMEGOOLIEBIRD): And again, that's another reason for not having
[2364.97] Rupert (OMEGOOLIEBIRD): excess electronics in the plane.
[2365.97] Rupert (OMEGOOLIEBIRD): I'd like to have a data logger in there,
[2367.97] Rupert (OMEGOOLIEBIRD): but again, that's just more noise for the UHF,
[2369.97] Rupert (OMEGOOLIEBIRD): so the less that's in there, the better, really,
[2371.97] Rupert (OMEGOOLIEBIRD): and it does work very well.
[2373.97] Rupert (OMEGOOLIEBIRD): So I've been to, well, now I can't really say the distance,
[2376.97] Rupert (OMEGOOLIEBIRD): but yeah.
[2378.97] Rupert (OMEGOOLIEBIRD): At least that far.
[2381.97] Jack: You had a friend who flew how far?
[2385.97] Rupert (OMEGOOLIEBIRD): Yeah, I saw somebody once fly 20km or something away.
[2394.97] Jack: That's very dangerous.
[2395.97] Jack: Yeah.
[2396.97] Jack: Must have been in France.
[2397.97] Jack: Yeah.
[2399.97] Rupert (OMEGOOLIEBIRD): Isn't it a shame for the laws?
[2401.97] Rupert (OMEGOOLIEBIRD): Because I really, really would like to take this plane
[2403.97] Rupert (OMEGOOLIEBIRD): somewhere flat, put it five miles away
[2406.97] Rupert (OMEGOOLIEBIRD): and then just fly a whole battery back at three feet off the ground.
[2409.97] Rupert (OMEGOOLIEBIRD): You know, what a video that I'd make and what a fun it'd be.
[2411.97] Rupert (OMEGOOLIEBIRD): But I can't legally do it.
[2413.97] Rupert (OMEGOOLIEBIRD): I can't ask for permission to do it.
[2415.97] Rupert (OMEGOOLIEBIRD): You know, it's just, it's not even feasible to do it.
[2417.97] Curry: It gets more like full flats somewhere.
[2419.97] Curry: Yeah.
[2420.97] Curry: Perhaps one day, one of us would just find an SD card on the floor
[2424.97] Curry: with that sort of pages on and we can share it.
[2426.97] Curry: That'd be good.
[2427.97] Tony: I found this, honestly.
[2429.97] Stephen: Probably you find some beach areas and, you know, mud flats,
[2432.97] Stephen: estuaries and stuff like that where you might get a good run.
[2435.97] Rupert (OMEGOOLIEBIRD): It's landing it.
[2436.97] Rupert (OMEGOOLIEBIRD): It's having a runway that's 600 meters long and flat, you know.
[2439.97] Rupert (OMEGOOLIEBIRD): It's coming in at 60 kilometers.
[2441.97] Rupert (OMEGOOLIEBIRD): It stalls at 60 kilometers an hour.
[2443.97] Rupert (OMEGOOLIEBIRD): So it needs a pretty nice surface to drop on.
[2446.97] Curry: See, the thing is, with a lot of like planes or quads,
[2450.97] Curry: you can be quite subtle.
[2451.97] Curry: You can find an area where perhaps you're not meant to be
[2453.97] Curry: and you can sneak off in there and you can do a couple of flights
[2455.97] Curry: and you can come back and like, he, he, no one saw me.
[2458.97] Curry: People in the next county along can hear your plane.
[2462.97] Curry: So it's like, it's not like you can just sneak off.
[2465.97] Curry: It like pinned news reports like, you know, mountains of complaints
[2469.97] Curry: and some unexplained noises coming from this area of woodland.
[2473.97] Curry: Get a piece of whatever, some fancy screen.
[2477.97] Stephen: You want a nice farmer with a field on the coast somewhere
[2481.97] Stephen: so you can just like go out to sea and blast it.
[2484.97] Rupert (OMEGOOLIEBIRD): I spend about an hour a night on Google Earth just going round the country
[2488.97] Rupert (OMEGOOLIEBIRD): and seeing.
[2490.97] Rupert (OMEGOOLIEBIRD): The trouble is, airfields would have been perfect.
[2493.97] Rupert (OMEGOOLIEBIRD): All the World War II airfields would have been perfect.
[2495.97] Rupert (OMEGOOLIEBIRD): But they're cellophones and housing estates now, so.
[2497.97] Rupert (OMEGOOLIEBIRD): What about Camber Sands?
[2499.97] Rupert (OMEGOOLIEBIRD): Nice stretch of beach, yeah.
[2501.97] Rupert (OMEGOOLIEBIRD): Camber Sands. So there'd be people on the sands.
[2503.97] Rupert (OMEGOOLIEBIRD): And sand, I don't know how.
[2505.97] Tony: Well, I've been there early enough on a summer's morning
[2507.97] Tony: where there's no one there.
[2508.97] Rupert (OMEGOOLIEBIRD): Really?
[2509.97] Rupert (OMEGOOLIEBIRD): Okay, yeah, maybe.
[2511.97] Rupert (OMEGOOLIEBIRD): I think somewhere, I'd like to go somewhere with some perspective,
[2514.97] Rupert (OMEGOOLIEBIRD): some scale to it.
[2515.97] Rupert (OMEGOOLIEBIRD): So you could fly over a derelict town or something like that
[2518.97] Rupert (OMEGOOLIEBIRD): so you could see the buildings going past
[2520.97] Rupert (OMEGOOLIEBIRD): because it does just look like a full-size plane
[2523.97] Rupert (OMEGOOLIEBIRD): when you're flying at that speed.
[2524.97] Rupert (OMEGOOLIEBIRD): The perspective just, it doesn't look that fast, you know,
[2526.97] Rupert (OMEGOOLIEBIRD): until you go past a car or something.
[2528.97] Rupert (OMEGOOLIEBIRD): But when you see my phone below, it's tiny.
[2531.97] Rupert (OMEGOOLIEBIRD): You know, it just doesn't make any sense.
[2533.97] Rupert (OMEGOOLIEBIRD): So, yeah, I'd like to get some perspective into it
[2536.97] Rupert (OMEGOOLIEBIRD): and then get a better video next time.
[2539.97] Jack: An unidentified flying Rupert.
[2546.97] Jack: Richard Warwick was recommending the Speedflee,
[2554.97] Jack: which has got a GPS on it as well.
[2558.97] Jack: It's still a GPS, isn't it?
[2560.97] Frank: Yeah.
[2561.97] Rupert (OMEGOOLIEBIRD): I've got one of those, but, you know,
[2563.97] Rupert (OMEGOOLIEBIRD): I've had readings that are just absurd with it,
[2565.97] Rupert (OMEGOOLIEBIRD): so I can't really rely on it.
[2567.97] Rupert (OMEGOOLIEBIRD): I don't know.
[2568.97] Rupert (OMEGOOLIEBIRD): Because I was flying at line of sight again,
[2570.97] Rupert (OMEGOOLIEBIRD): so I got readings of 350 miles an hour out of a fun jet,
[2573.97] Rupert (OMEGOOLIEBIRD): so it's not realistic.
[2575.97] Curry: So do they want basically two posts
[2579.97] Curry: where you can have some laser or something to record?
[2581.97] Curry: You went from there to there.
[2582.97] Curry: It's set distance, therefore your speed is this.
[2585.97] Rupert (OMEGOOLIEBIRD): Yeah.
[2586.97] Rupert (OMEGOOLIEBIRD): What we're going to do this time is put two GoPros on their back,
[2588.97] Rupert (OMEGOOLIEBIRD): 200 meters apart.
[2590.97] Rupert (OMEGOOLIEBIRD): We'll sync them up first,
[2591.97] Rupert (OMEGOOLIEBIRD): walk them out on the runway and put them on their back,
[2593.97] Rupert (OMEGOOLIEBIRD): and then I'll fly over the top of them.
[2594.97] Rupert (OMEGOOLIEBIRD): Hopefully we'll see the plane in a frame.
[2596.97] Rupert (OMEGOOLIEBIRD): We'll also hear the peak of the sound as it goes overhead,
[2598.97] Rupert (OMEGOOLIEBIRD): so we should be able to get out of time between those.
[2601.97] Rupert (OMEGOOLIEBIRD): And we'll put another one at the end of the runway, so 600 meters.
[2604.97] Rupert (OMEGOOLIEBIRD): So I'm going to try and do the whole runway,
[2606.97] Rupert (OMEGOOLIEBIRD): 600 meters at 500 kilometers an hour,
[2608.97] Rupert (OMEGOOLIEBIRD): average 500 over it.
[2609.97] Rupert (OMEGOOLIEBIRD): And that would kind of put that to bed really.
[2612.97] Tony: Do you make sure you go out when there's zero wind,
[2616.97] Tony: or do you have a tail wind, or do you go out when there's wind?
[2619.97] Rupert (OMEGOOLIEBIRD): No, just when I gather the balls to go and do it really.
[2623.97] Rupert (OMEGOOLIEBIRD): It certainly happens.
[2625.97] Rupert (OMEGOOLIEBIRD): I'm like, today I've got to do this, tomorrow or whatever.
[2628.97] Rupert (OMEGOOLIEBIRD): It's got to happen.
[2629.97] Rupert (OMEGOOLIEBIRD): And actually, having spoken to some of these German speed guys,
[2633.97] Rupert (OMEGOOLIEBIRD): they're saying that they've seen differences of 100 kilometers an hour
[2637.97] Rupert (OMEGOOLIEBIRD): between meteorological conditions.
[2640.97] Rupert (OMEGOOLIEBIRD): So he was saying that relative humidity, apparently,
[2643.97] Rupert (OMEGOOLIEBIRD): is the biggest factor to look at.
[2645.97] Rupert (OMEGOOLIEBIRD): And the day we did this 500 kilometer an hour,
[2649.97] Rupert (OMEGOOLIEBIRD): you can see how humid it was.
[2651.97] Rupert (OMEGOOLIEBIRD): It was thick cloud at 300 meters,
[2654.97] Rupert (OMEGOOLIEBIRD): and it was a pretty sort of misty day.
[2656.97] Rupert (OMEGOOLIEBIRD): So there could be a lot to come from flying on a hotter day
[2660.97] Rupert (OMEGOOLIEBIRD): where the air is thinner and it's less humid.
[2662.97] Rupert (OMEGOOLIEBIRD): Oh really?
[2663.97] Stephen: Less punch through.
[2664.97] Rupert (OMEGOOLIEBIRD): Yeah, hopefully, yeah.
[2665.97] Rupert (OMEGOOLIEBIRD): So the drag is more important than the thrust.
[2667.97] Rupert (OMEGOOLIEBIRD): You lose a bit of thrust, but obviously that drag is...
[2669.97] Stephen: But if you're RF reception as well.
[2671.97] Rupert (OMEGOOLIEBIRD): Yeah, yeah, yeah.
[2674.97] Jack: Proped Up asks, do you have to do two runs or just one?
[2680.97] Rupert (OMEGOOLIEBIRD): I think have to is, there's no real official record for it.
[2684.97] Rupert (OMEGOOLIEBIRD): And I think it just started on FPV Lab.
[2688.97] Rupert (OMEGOOLIEBIRD): There was a sort of forum thread,
[2690.97] Rupert (OMEGOOLIEBIRD): and it was your personal best, basically.
[2692.97] Rupert (OMEGOOLIEBIRD): Everybody's sort of furthest distance and speed and stuff.
[2695.97] Rupert (OMEGOOLIEBIRD): And it was that ladderboard that I was blown away
[2698.97] Rupert (OMEGOOLIEBIRD): by the speed people were getting,
[2699.97] Rupert (OMEGOOLIEBIRD): and I kind of worked my way up it, you know?
[2702.97] Rupert (OMEGOOLIEBIRD): And then unfortunately that stopped,
[2703.97] Rupert (OMEGOOLIEBIRD): so the kind of competition sort of...
[2705.97] Rupert (OMEGOOLIEBIRD): When the regulations came,
[2706.97] Rupert (OMEGOOLIEBIRD): and I don't think people wanted to publish
[2707.97] Rupert (OMEGOOLIEBIRD): how far they were going and how high they were going.
[2710.97] Rupert (OMEGOOLIEBIRD): So that kind of stopped.
[2711.97] Rupert (OMEGOOLIEBIRD): So I only really fly on those rules.
[2713.97] Rupert (OMEGOOLIEBIRD): It's GPS ground speed,
[2714.97] Rupert (OMEGOOLIEBIRD): so you kind of got to be level at the time of the reading.
[2718.97] Rupert (OMEGOOLIEBIRD): You can be downwind,
[2719.97] Rupert (OMEGOOLIEBIRD): because it's about flying like a fighter jet, isn't it?
[2721.97] Rupert (OMEGOOLIEBIRD): So if you want to use the wind, you can use the wind,
[2724.97] Rupert (OMEGOOLIEBIRD): but it means you've got a launch on a windy day and things.
[2726.97] Rupert (OMEGOOLIEBIRD): So yeah, there are no rules,
[2730.97] Rupert (OMEGOOLIEBIRD): but other people in different speed spheres have rules,
[2735.97] Rupert (OMEGOOLIEBIRD): and I kind of want to do something that relates to their rules,
[2738.97] Rupert (OMEGOOLIEBIRD): so that, you know, I don't get kind of laughed at.
[2742.97] Stephen: So there's no official body that's trying to jump in here.
[2744.97] Stephen: I mean, Guinness would be the obvious one,
[2746.97] Stephen: but is there anything in the model flying association
[2749.97] Stephen: that encourages this, or is it all just dubious,
[2751.97] Stephen: because of the line of sight requirements and spotting?
[2755.97] Curry: I don't think this is encouraged.
[2758.97] Curry: That's why it's so much fun.
[2760.97] Stephen: It's kind of a shame,
[2761.97] Stephen: because it's a great technology showcase.
[2763.97] Rupert (OMEGOOLIEBIRD): Yeah, it is, yeah, yeah.
[2765.97] Rupert (OMEGOOLIEBIRD): I really would like something to come over it,
[2767.97] Rupert (OMEGOOLIEBIRD): somebody to contact me and say,
[2768.97] Rupert (OMEGOOLIEBIRD): hey, we'd like you to do this,
[2770.97] Rupert (OMEGOOLIEBIRD): or we'd like to supply batteries,
[2771.97] Rupert (OMEGOOLIEBIRD): or just maybe some help with it somewhere.
[2775.97] Rupert (OMEGOOLIEBIRD): I think I'm going to maybe do a video and just sort of say that,
[2778.97] Rupert (OMEGOOLIEBIRD): but this next one is going to be more expensive and time-consuming,
[2782.97] Rupert (OMEGOOLIEBIRD): and I'd like some sort of help with it from, like you were saying,
[2786.97] Rupert (OMEGOOLIEBIRD): do I need to do more aerodynamics?
[2788.97] Rupert (OMEGOOLIEBIRD): I'd like to get somebody involved that knows about aerodynamics.
[2792.97] Rupert (OMEGOOLIEBIRD): It's too much learning to really know what you're doing.
[2796.97] Rupert (OMEGOOLIEBIRD): I'd be just stabbing a stick at it, really,
[2799.97] Rupert (OMEGOOLIEBIRD): in terms of what you need to know to get aerodynamics right.
[2802.97] Rupert (OMEGOOLIEBIRD): So it'd be nice to get somebody involved in that
[2804.97] Rupert (OMEGOOLIEBIRD): and somebody to help build it as well,
[2805.97] Rupert (OMEGOOLIEBIRD): somebody that's good at composites,
[2806.97] Rupert (OMEGOOLIEBIRD): and somebody to supply batteries, maybe,
[2810.97] Rupert (OMEGOOLIEBIRD): just make it a better project, more than I can afford it, maybe.
[2814.97] Stephen: So what is your airframe?
[2815.97] Stephen: Is it still foam at the moment,
[2816.97] Stephen: or have you got a carbon fibre airframe?
[2818.97] Rupert (OMEGOOLIEBIRD): It's fibreglass for reasons of the video.
[2822.97] Rupert (OMEGOOLIEBIRD): I think anything I've tried with carbon fibre is not so great with the video.
[2826.97] Rupert (OMEGOOLIEBIRD): Yeah, just fibreglass hollow.
[2829.97] Rupert (OMEGOOLIEBIRD): It's a single layer of fibreglass, then ARX foam,
[2832.97] Rupert (OMEGOOLIEBIRD): and then another thin layer of fibreglass over it.
[2834.97] Rupert (OMEGOOLIEBIRD): So it's not just a thin layer of fibreglass.
[2837.97] Rupert (OMEGOOLIEBIRD): It's actually quite structural.
[2838.97] Rupert (OMEGOOLIEBIRD): But the plane was only really designed for 150 miles an hour
[2842.97] Rupert (OMEGOOLIEBIRD): when the guy made it.
[2844.97] Rupert (OMEGOOLIEBIRD): So it's got to be getting close to what it'll stand, I think.
[2850.97] Rupert (OMEGOOLIEBIRD): Flapping.
[2851.97] Stephen: Do you notice any resonance?
[2852.97] Stephen: Do you notice vibrations start to build up when you take the speed up, then?
[2856.97] Rupert (OMEGOOLIEBIRD): No, none at all so far.
[2857.97] Rupert (OMEGOOLIEBIRD): There is a yaw wiggle on it for some reason.
[2860.97] Rupert (OMEGOOLIEBIRD): It's always had that at any speed.
[2861.97] Rupert (OMEGOOLIEBIRD): I don't really know what it is.
[2862.97] Rupert (OMEGOOLIEBIRD): I've had some aerodynamicists talk about divergent drag
[2866.97] Rupert (OMEGOOLIEBIRD): or something potentially coming off the step in the wing,
[2868.97] Rupert (OMEGOOLIEBIRD): but it doesn't really seem to affect it.
[2870.97] Rupert (OMEGOOLIEBIRD): But it's definitely not any kind of flutter, which would be immediately.
[2876.97] Stephen: Have you had any kind of high-speed failures?
[2878.97] Stephen: You find a weak link in the chain when you take these things up to the intended speed,
[2882.97] Stephen: or has it been pretty good?
[2884.97] Rupert (OMEGOOLIEBIRD): I did to start with, and I think that I learned pretty quickly
[2888.97] Rupert (OMEGOOLIEBIRD): that you've got to make stuff much, much stronger
[2890.97] Rupert (OMEGOOLIEBIRD): than it needs to be in order not to come across those problems
[2893.97] Rupert (OMEGOOLIEBIRD): because that will just wreck the whole project.
[2895.97] Rupert (OMEGOOLIEBIRD): I had servos kind of not being strong enough and stuff
[2899.97] Rupert (OMEGOOLIEBIRD): and quickly kind of just went for the best that I can fit in there.
[2903.97] Stephen: What type of brands of servos are you going for these days, then?
[2906.97] Rupert (OMEGOOLIEBIRD): So for 200 miles an hour, there's a lot, really.
[2908.97] Rupert (OMEGOOLIEBIRD): I mean, Savox I've always stuck by,
[2910.97] Rupert (OMEGOOLIEBIRD): but I had a Savox fail recently that put a Spitfire through my girlfriend's car window.
[2915.97] Stephen: So I don't know.
[2920.97] Rupert (OMEGOOLIEBIRD): For the top end, it's MKS, which is what?
[2926.97] Rupert (OMEGOOLIEBIRD): I don't know if you people would have seen Spencer Lisonby's Blader record,
[2930.97] Rupert (OMEGOOLIEBIRD): the DS Blader, which puts my record into, you know,
[2934.97] Rupert (OMEGOOLIEBIRD): it's kids games compared to what he's doing.
[2937.97] Rupert (OMEGOOLIEBIRD): He is line of sight flying at 545 miles an hour.
[2940.97] Rupert (OMEGOOLIEBIRD): Yes, we've seen that.
[2943.97] Curry: I think we've seen it before.
[2945.97] Curry: It's bizarre, the dynamic soaring thing, how it just keeps it accelerating
[2948.97] Curry: and accelerating and, like, weird.
[2951.97] Rupert (OMEGOOLIEBIRD): He did a TED talk about some of the things involved with that.
[2957.97] Rupert (OMEGOOLIEBIRD): And with the best servos, the best radio, the minimum latency you can have,
[2964.97] Rupert (OMEGOOLIEBIRD): you've got to see the plane, you've got to think about it,
[2966.97] Rupert (OMEGOOLIEBIRD): you've got to put the input in the controller.
[2968.97] Rupert (OMEGOOLIEBIRD): That's got to get to the plane.
[2970.97] Rupert (OMEGOOLIEBIRD): The servo has got to move and everything.
[2973.97] Rupert (OMEGOOLIEBIRD): And his latency in that respect is 100 metres.
[2976.97] Rupert (OMEGOOLIEBIRD): So whatever happens, he's got to be 100 metres ahead of it
[2980.97] Rupert (OMEGOOLIEBIRD): because it's already happened.
[2982.97] Rupert (OMEGOOLIEBIRD): He's calculating what's got to the plane.
[2984.97] Jack: Oh, my God.
[2986.97] Jack: When this reaches 88 miles an hour.
[2990.97] Jack: Great score.
[2992.97] Rupert (OMEGOOLIEBIRD): Yeah, mind blowing, it puts what I do into insignificance, really.
[2995.97] Rupert (OMEGOOLIEBIRD): It's amazing.
[2998.97] Stephen: Looks like he's got one big rope and he's just wheeling it round his head.
[3003.97] Rupert (OMEGOOLIEBIRD): He's essentially got three metre propeller, I think it's four metre propeller blades
[3009.97] Rupert (OMEGOOLIEBIRD): and an 80 mile an hour wind to use on them.
[3013.97] Rupert (OMEGOOLIEBIRD): Actually, I think if you calculated that in watts that it's able to use,
[3017.97] Rupert (OMEGOOLIEBIRD): it's probably quite a lot, I should think.
[3020.97] Jack: Right, we're going to have to get through some questions
[3023.97] Jack: because we've only got 10 minutes left.
[3025.97] Jack: Badger FPV asks, could you do peak FPV signal strength like Sariva does in lap timing?
[3037.47] Rupert (OMEGOOLIEBIRD): I don't know whether that would work.
[3039.47] Rupert (OMEGOOLIEBIRD): I don't know how fast that would work.
[3041.47] Frank: I'll step in there and say it probably would work,
[3043.47] Frank: but it would mean you're then having to engineer a 1.3 gigahertz lap timer
[3047.47] Frank: and we've only just got hold of like 5.8 gigahertz.
[3050.47] Stephen: You'd also have to fly a preset course through flags
[3053.47] Stephen: which might be a little tricky.
[3055.47] Rupert (OMEGOOLIEBIRD): That's what I'm going to do this time.
[3057.47] Rupert (OMEGOOLIEBIRD): I'm going to try and fly it right over the top of the camera, so hopefully.
[3060.47] Rupert (OMEGOOLIEBIRD): I can point it where I want it.
[3062.47] Rupert (OMEGOOLIEBIRD): I mean, I can fly a pretty tight line with it,
[3065.47] Rupert (OMEGOOLIEBIRD): so I just stay high at the moment just to avoid problems.
[3067.47] Rupert (OMEGOOLIEBIRD): It was just trying to get the speed,
[3069.47] Rupert (OMEGOOLIEBIRD): so this time we'll try and get speed and try and be three fly off the ground, hopefully.
[3073.47] Rupert (OMEGOOLIEBIRD): Looking forward to the noise from the go.
[3077.47] Jack: Caroline Taylor asks, ever considered a variable pitch prop?
[3083.47] Rupert (OMEGOOLIEBIRD): Yes, definitely.
[3085.47] Rupert (OMEGOOLIEBIRD): I'd be interested in that,
[3086.47] Rupert (OMEGOOLIEBIRD): but how it would be possible at that sort of power level in something that small?
[3090.47] Rupert (OMEGOOLIEBIRD): I don't know.
[3091.47] Jack: Off the heli, guys.
[3094.47] Rupert (OMEGOOLIEBIRD): Yeah, I guess heli equipment like tail equipment probably would be the best place to start looking.
[3100.47] Rupert (OMEGOOLIEBIRD): I don't know why it hasn't been done already.
[3102.47] Rupert (OMEGOOLIEBIRD): I haven't seen it in the German speed planes
[3104.47] Rupert (OMEGOOLIEBIRD): or the kind of benchmark of what's fast and electric,
[3107.47] Rupert (OMEGOOLIEBIRD): and I haven't seen them using that kind of technology.
[3111.47] Rupert (OMEGOOLIEBIRD): So, I don't know, maybe they haven't thought of it.
[3114.47] Rupert (OMEGOOLIEBIRD): They must have thought of it,
[3115.47] Rupert (OMEGOOLIEBIRD): but maybe they just haven't implemented it yet,
[3117.47] Rupert (OMEGOOLIEBIRD): but they've probably tried, I would think.
[3121.47] Jack: Badger RC says, have you contacted the FAI for ratification?
[3132.47] Rupert (OMEGOOLIEBIRD): No, it wouldn't be legal for that.
[3137.47] Rupert (OMEGOOLIEBIRD): I think there'd be certain stipulations in that
[3139.47] Rupert (OMEGOOLIEBIRD): that mean it wouldn't be legal.
[3142.47] Stephen: So, Frank, is it the visual line of sight must be a max of 400 metres or something?
[3150.47] Stephen: Is that the answer to this?
[3153.47] Frank: I mean, there is the guidance that there's 500 metres is generally accepted to be the extent of visual line of sight,
[3160.47] Frank: but there are things like they do say in the guidance,
[3164.47] Frank: if it's kind of dusky and you've got LEDs on it,
[3168.47] Frank: so you'll be able to see it further away than that.
[3170.47] Frank: So, that isn't like a hard limit if you can justify it.
[3173.47] Frank: Like a bigger aircraft, you know, you can see that further away.
[3177.47] Frank: So, it's not like 500 metres is the limit.
[3179.47] Stephen: If you had some nice bright wingtip LEDs potentially,
[3181.47] Stephen: that would actually be a legal light then.
[3184.47] Stephen: Yeah.
[3185.47] Curry: Which you could take to 10K, as previously mentioned.
[3189.47] Jack: Shady says, set up a race with top gear.
[3194.47] Rupert (OMEGOOLIEBIRD): That's what I'd like to come from.
[3196.47] Rupert (OMEGOOLIEBIRD): I'd like something to come.
[3197.47] Rupert (OMEGOOLIEBIRD): Somebody would say, hey, can you bring your plane here and do it again?
[3200.47] Rupert (OMEGOOLIEBIRD): I'd love it.
[3201.47] Rupert (OMEGOOLIEBIRD): I'd love it.
[3202.47] Curry: Yeah, something like over in Dubai, racing a Bugatti, something like walking fast.
[3207.47] Curry: Yeah, racing's very wrong.
[3208.47] Jack: Yeah, racing's very wrong.
[3209.47] Rupert (OMEGOOLIEBIRD): It better be quick.
[3211.47] Jack: MagicWentPensour asks, what is the best crash you've ever had?
[3218.47] Rupert (OMEGOOLIEBIRD): I had one recently with a fun jet that was only probably 120 miles an hour,
[3222.47] Rupert (OMEGOOLIEBIRD): but I hit the ground at 120 miles an hour,
[3224.47] Rupert (OMEGOOLIEBIRD): kissed the ground, and the battery was 100 metres away from where the plane landed.
[3235.47] Stephen: Is it like a crater?
[3236.47] Stephen: What shape was the battery when you found it?
[3239.47] Rupert (OMEGOOLIEBIRD): It's still working.
[3240.47] Rupert (OMEGOOLIEBIRD): It's a lithium-arm pack.
[3241.47] Rupert (OMEGOOLIEBIRD): Wow.
[3243.47] Rupert (OMEGOOLIEBIRD): When the plane hit the ground, it must have trebuchet out the back of it
[3246.47] Rupert (OMEGOOLIEBIRD): and done it in a single log.
[3252.47] Jack: Jeez.
[3253.47] Rupert (OMEGOOLIEBIRD): Wonderful.
[3255.47] Rupert (OMEGOOLIEBIRD): Yeah, nothing really spectacular, fast crashes, I think,
[3258.47] Rupert (OMEGOOLIEBIRD): because I just kind of build stuff strong and it doesn't go wrong, so nothing really too bad.
[3267.47] Jack: Shady asks, do you still see Mark, Charlie, Geoff and Kev?
[3272.47] Rupert (OMEGOOLIEBIRD): No, sadly I don't.
[3273.47] Rupert (OMEGOOLIEBIRD): I would love to.
[3274.47] Rupert (OMEGOOLIEBIRD): I still speak to Mark on Facebook sometimes.
[3278.47] Rupert (OMEGOOLIEBIRD): I think the story was their work schedules changed,
[3281.47] Rupert (OMEGOOLIEBIRD): and I think there was some trouble with the farm.
[3283.47] Rupert (OMEGOOLIEBIRD): It all got a bit populated.
[3284.47] Rupert (OMEGOOLIEBIRD): You know, it was just the four guys to start with,
[3286.47] Rupert (OMEGOOLIEBIRD): and then it was kind of 12 or 15 people turning up,
[3288.47] Rupert (OMEGOOLIEBIRD): and another farmer started charging for the field and things,
[3291.47] Rupert (OMEGOOLIEBIRD): and I think it just all changed, and they got fed up with it.
[3294.47] Rupert (OMEGOOLIEBIRD): And to be fair to Mark, he was editing the video a week and answering every single message,
[3299.47] Rupert (OMEGOOLIEBIRD): and I think, you know, I think he's got his young man.
[3302.47] Rupert (OMEGOOLIEBIRD): Yeah, he's got a young man, and I think it was just too much.
[3306.47] Curry: Yeah, he said he was getting like 100 gigabytes of footage,
[3309.47] Curry: because he was just like going out for hours and just filming and editing that.
[3314.47] Rupert (OMEGOOLIEBIRD): It was so much fun though.
[3315.47] Rupert (OMEGOOLIEBIRD): I can't, you know, I can't say how much fun that was.
[3318.47] Rupert (OMEGOOLIEBIRD): You don't know what you've got till it's gone really, I think, that's the thing, isn't it?
[3322.47] Tony: I still watch them every now and again if I want to chuckle.
[3327.47] Jack: Caroline and Taylor are slowing down.
[3329.47] Jack: Try streamer deploy.
[3332.47] Rupert (OMEGOOLIEBIRD): Yes, yeah.
[3333.47] Rupert (OMEGOOLIEBIRD): Yeah, it would be nice, but you've got stuff on board,
[3336.47] Rupert (OMEGOOLIEBIRD): and how do you deploy it,
[3337.47] Rupert (OMEGOOLIEBIRD): and what mechanism, and just, yeah, more problems, so just the minimum.
[3341.47] Stephen: You've got a prop out the back as well.
[3342.47] Rupert (OMEGOOLIEBIRD): Minimum stuff.
[3343.47] Rupert (OMEGOOLIEBIRD): So that's one of the problems I've got now is that the prop I was using before was a fixed blade prop.
[3348.47] Rupert (OMEGOOLIEBIRD): So when I was landing, that was windmilling, so it was acting as a brake,
[3351.47] Rupert (OMEGOOLIEBIRD): but now it's a folding prop, which is why I've got this ridiculous landing approach now,
[3355.47] Rupert (OMEGOOLIEBIRD): because it just does nothing to slow it down.
[3357.47] Rupert (OMEGOOLIEBIRD): So I think on the next project, if I'm going to do this 24-hour project,
[3361.47] Rupert (OMEGOOLIEBIRD): it's going to have to have some kind of some flat lift surface, split add-ons or something.
[3368.47] Rupert (OMEGOOLIEBIRD): Maybe two sets of add-ons, you know, split add-ons.
[3371.47] Rupert (OMEGOOLIEBIRD): Just fire a shootout.
[3372.47] Tony: Any pillboxes in that field you're flying from, you can see there, I would be there.
[3378.47] Tony: Filing that all behind Jack, probably.
[3381.47] Tony: Yeah.
[3384.47] Jack: Don't blame your mate, don't blame him.
[3388.47] Jack: The trouble is, yeah.
[3390.47] Curry: I think you should also get a pulse meter on you for next time, just to see what it says.
[3396.47] Curry: Our pal Bruno used to do this when he was trying to fly high-speed stuff, and it was high.
[3401.47] Curry: And I mean, I stood behind him, I could see his leg shaking as well,
[3404.47] Curry: which is always quite an indication that he might be quite scared at the time.
[3408.47] Stephen: There was a PR for beta flight, you know, to add that into the on-screen display.
[3411.47] Stephen: Heart rate meter.
[3413.47] Stephen: That'd be quite cool.
[3415.47] Curry: Now, I've always noticed this, because sometimes when I go out on a flight,
[3418.47] Curry: I walk and I put my Apple Watch on to record my steps and my heartbeat,
[3423.47] Curry: and sometimes I forget to turn it off, and I'm packing up my stuff,
[3426.47] Curry: and my heart rate is still like, oh, I'm at 150.
[3428.47] Curry: That's interesting.
[3429.47] Curry: That must have been quite exciting.
[3432.47] Curry: Or I'm really unfit.
[3433.47] Curry: One of the two.
[3434.47] Rupert (OMEGOOLIEBIRD): Yeah.
[3435.47] Curry: Why does it have to be just one?
[3440.47] Rupert (OMEGOOLIEBIRD): Bruno was a legend, really, wasn't he?
[3441.47] Rupert (OMEGOOLIEBIRD): He was kind of inspirational to me with his Jack-powered fun-jack and things.
[3446.47] Rupert (OMEGOOLIEBIRD): That's why I built the Jack plane, really.
[3448.47] Rupert (OMEGOOLIEBIRD): He did it, and I thought, wow, that's a great idea.
[3450.47] Rupert (OMEGOOLIEBIRD): I want to do that.
[3452.47] Rupert (OMEGOOLIEBIRD): And his heart rate monitor thing was brilliant as well.
[3455.47] Rupert (OMEGOOLIEBIRD): It really added to the videos, I think.
[3458.47] Rupert (OMEGOOLIEBIRD): I'm pretty rubbish at the neck, actually, so I don't know if I could even do that,
[3462.47] Rupert (OMEGOOLIEBIRD): to be honest.
[3463.47] Curry: He had all the fun of building launcher.
[3465.47] Curry: Launchers are great, because at least two in ten times they will fail,
[3469.47] Curry: and it's just like, just slow, like, off the end of the launcher.
[3474.47] Rupert (OMEGOOLIEBIRD): That's the thing, isn't it?
[3475.47] Rupert (OMEGOOLIEBIRD): It's all happening two foot off the ground with the launcher for a peer at a time.
[3479.47] Rupert (OMEGOOLIEBIRD): It's two foot off the ground near its stall speed,
[3482.47] Rupert (OMEGOOLIEBIRD): so they're kind of their real risky option, I think.
[3486.47] Rupert (OMEGOOLIEBIRD): That's why this vert launch is really good, if you can do it, you know?
[3491.47] Curry: Yeah, I guess it's complicated in the fact you need, like, multiple people
[3496.47] Curry: and, you know, lots of moving parts, but easier if you can get it up there.
[3501.47] Jack: Yeah.
[3503.47] Jack: Propped up FPV with that heliprop.
[3505.47] Jack: It'll be spinning mast that would be the problem, I think.
[3511.47] Stephen: More mechanical gubbins being spun around.
[3515.47] Jack: Yeah.
[3516.47] Jack: Double A, so did he say what it was like in the future yet?
[3522.47] Jack: Shady goes,
[3523.47] Jack: how's Adele, does she still go flying with you?
[3527.47] Rupert (OMEGOOLIEBIRD): She's great, thank you.
[3529.47] Rupert (OMEGOOLIEBIRD): She's very well, and she does still come flying with me.
[3533.47] Rupert (OMEGOOLIEBIRD): I got her ornithopter, which is a brushless powered flapping bird,
[3537.47] Rupert (OMEGOOLIEBIRD): which is great.
[3538.47] Rupert (OMEGOOLIEBIRD): She comes out.
[3539.47] Stephen: Cool.
[3540.47] Rupert (OMEGOOLIEBIRD): We don't get to do it so much these days,
[3542.47] Rupert (OMEGOOLIEBIRD): with a youngster in tow, but he'll get there.
[3544.47] Rupert (OMEGOOLIEBIRD): He's saying the word aeroplane now, so we're getting there.
[3547.47] Rupert (OMEGOOLIEBIRD): Promising.
[3551.47] Jack: All right, guys, that is all we've got time for.
[3556.47] Jack: Rupert, thank you so much for coming along.
[3558.47] Jack: Mark Long and joining us and sharing your incredible flights,
[3563.47] Jack: and we hope for many more successful records.
[3568.47] Jack: Think of us and keep us updated.
[3571.47] Jack: Good luck.
[3572.47] Jack: Yeah, if you want any of our stickers to then stick on your aeroplane
[3576.47] Jack: and then you have them peel off due to excess speed, let us know.
[3581.47] Curry: Slow it down.
[3583.47] Jack: You've been joined by Curry Kitten.
[3588.47] Jack: Goodbye.
[3590.47] Jack: Oh, my Google bird or Rupert.
[3594.47] Stephen: Wow, look at that monster.
[3596.47] Jack: He's holding up a big old 14S battery that has what only can be described
[3604.47] Jack: as about six balance leads hanging off it.
[3609.47] Jack: And what connector?
[3611.47] Jack: EC5.
[3612.47] Rupert (OMEGOOLIEBIRD): It's only 170 amps, so it's not totally.
[3619.47] Jack: You've been joined by Stephen.
[3621.47] Jack: Cheers.
[3622.47] Jack: Thanks.
[3623.47] Jack: My darling wife.
[3624.47] Tony: Bonjour.
[3626.47] Jack: Our Lord of Master, Andrew Saffranque.
[3628.47] Jack: Bye.
[3629.47] Jack: And I've been brought into the fly.
[3631.47] Jack: Thank you, guys.
[3632.47] Jack: Good night.
[3633.47] Jack: Bye.
[3634.47] Frank: And thanks for all our patrons.
[3636.47] Jack: Bye, bye.
[3638.47] Stephen: Telemetry last.
[3640.47] Frank: We have also has delivery of scarves that I think they're mostly accounted for,
[3645.47] Frank: but get in touch if you want a scarf.
[3648.47] Frank: Bye.