Testing WWII Era Terrain Following 'Radar' On R/C Plane

Рет қаралды 281,770

5 ай бұрын

Use code "rctestflight" to get 15% off the Oupes Mega 3: oupes.com/products/oupes-mega...
FMS Fox: www.fmshobby.com/?ref=RCTestF...
Use code $10RCTF or RCTestFlight to get $10 off
Create a free Onshape account here. Engineers get Onshape Professional for free up to 6 months: onshape.pro/rctestflight
Onshape model: cad.onshape.com/documents/20c...
Lynx 3D Scanner on 3DMakerpro store: bit.ly/3w0HikE
code: rctf10 - gets you 10% off
Follow rctestflight on Instagram: / rctestflight_
Support rctestflight: / danielriley

Пікірлер: 787

@rctestflight

Heres the glider from this video:

@dominiq4343

We all agree that you should continue the Solar Plane series!

@mattweger437

KALMAN FILTER KALMAN FILTER

@artiumromanov9798

Those droneless camera birdview shots of the foam plane were top tier lmao

@Jimmy___

“OUPES Batteries: When you forget to put the drain plug in your Boston Whaler and your EcoFlow Delta gets submerged”

@FlyMIfYouGotM

After watching this fly I have a suggestion. Go back to the canard; this was on the right track. The problem is not the canard, it's the surface following wand. The wand is so stiff it is acting almost like a 2 position switch. As soon as it contacts the water, it's all or nothing deflection of the canard. Rather than using a rigid pole, try using a thin piece of stainless steel fishing wire. The wire should be thin enough to deflect at least 90 Deg with minimal deflection of the canard when force is applied to the tip of the wand. You want the canard to deflect more and more as the wand goes deeper and deeper in the water. It should be at full deflection only when the wand is substantially submerged. To achieve this balance, you may also need to increase tension on the rubber bands you are using to return the canard to a neutral position. By making the wand much more flexible, you are in effect adding mechanical dampening to the system.

@byron.

It seems like the feedback loop needs to account for both height above the ground and pitch. A pitched down plane nearing the water needs to pull up, but a pitched up plane near the water will soon be high enough above the water without further pulling up. In other words, the altitude adjustment loop needs to know if it is too low and pitched to go lower, or too low and pitched to go higher, with a weaker or even inverse adjustment in the latter case. Likewise for being too high. This was very apparent with the stick based design, but I suspect would be much easier to implement with the flight controller and ultrasonic sensor design.

@MegaDada1995

Speaking as a pilot, I can say that when I went from low-wing aircraft to flying a high-wing Cessna, I definitely made some rough landings at first, because of the reduced strength of the ground effect. When I was learning to fly, getting a good flare was one of the hardest things, exactly because of the ground effect. When the aircraft almost touches down, the efficiency of the wings increases dramatically, which means that even a slight movement of the elevators might pull the nose up too high ("ballooning"), exiting the ground effect again, losing a lot of airspeed and coming down hard.

@defenestrated23

You should measure the lag of the sonar sensor. Any lag in the PID "plant" moves the zeros and poles of the transfer function, which affects oscillations and stability

@anj000

I don't know, but it seems to me like you are struggling with a PDI. How exactly did you implement them? Have you tried using any algorithms to tune the PID?

@SwordFighterPKN

You just built the control loop of the hydrofoil sailboats.

@1967AJB

As usual, fantastic film. Re your vortex shedding imagery, I used to be a scientific photographer at the UK’s MoD Royal Aerospace Establishment, not really what you were trying to do, but in wind tunnels we used to use UV mini tufts on models to view localised flow patterns on the surface of the fuselage. Short lengths of thin string, with a UV fluorescent dye on it, at night with a good UV source and a camera with a high frame rate might give you some lovely images.

@keshermedia

@rctestflight

@shadowedmoonchannel

OMG that vape car hotboxed scene was hilarious! Actually made me laugh so hard. Thanks for that.

@recoilrob324

Wingtip vortices are fascinating things. At Oshkosh one year they had a Sea Fury with wingtip smoke being followed by a Mustang down show center. At the end of the runway the Sea Fury would pull up hard and bank to the right...which turned the smoke to a swirling mess behind it that in a couple seconds all came together in a perfectly round smoke ring...that the Mustang would then fly through. I thought this was the neatest thing I'd ever seen.

@JacquesTreehorn

I'm flyin low checkin efficiency gains

@_Lord_BoNes

Great series!

@melainekerfaou8418

Flight ontrol systems engineer here. Your videos are a delight, but with a bit of frustration around control design. I am sure that if you invested half as much time in beefing up your control systems engineering skills as you spend with 3d printing and whatnot, you'd be much less often puzzling over what's happening and you'd cut on the trial-and-error stage.

@lucabadue

Great video! As a control engineer, I suggest using MATLAB or similar tools to collect, analyze data and understand how the aircraft behaves. Testing altitude control ideas in the software before trying them out at the lake can help optimize the system. Also, be mindful of potential delay or lag from the sonar system, as ignoring them might cause issues with altitude control. Excited to see your progress!