ฝัง
- เผยแพร่เมื่อ 4 ต.ค. 2024
- The Spin-TOL was an attempt at a VTOL tail sitter design where the rotor blades become wings. The concept has merit, but is complex to implement. I tried to simplify it by using quad-copter style control instead of collective and cyclic pitch but failed. The control authority offered by the quad was insufficient, plus there is a natural instability associated with the fixed pitch rotor. It hovered OK and was weakly controllable, but as soon as it started moving sideways the control authority was beyond what the quad could deliver and it entered a spiral oscillation. After 2 such crashes we decided to try it in forward flight, but it failed there as well. The complication there is that the fuselage comes in 3 sections that have to spin relative to one another. This requires proper low friction bearings, but the nylon bushings used were both not stiff enough, and had too much friction. As a result, the nose section, which was not supposed to spin, rolled over and up elevator became down elevator causing a crash. I always knew that the design was marginal, and only pursued it because there was interest in its ability to fly as a Triebflugel, which is a spinning wing aircraft contemplated by German aircraft designers in WW2. The full scale Treibflugel was never built or flown, but has remained a subject of fascination in terms of whether it could have worked. The consensus is that it could have, but the complexity of such a thing makes it highly impractical. As if to prove the point, the Spin-TOL failed because it didn’t fully embrace the complexity required. I tried to “cheap out” or “simple out” and it didn’t work. A successful Treibflugel will have to wait until someone commits to doing it correctly, which is a lot of work.
R.D.
That was fantastic! Loved seeing it takeoff. Very strange yet majestic. Not quite sure how I've missed discovering your channel up to this point. ☺️
The large rotor will cause the correction of the upper quadcopter to be shifted by up to 90°, just like with a conventional helicopter. So pitching forward will result in a diagonal motion
That sure got my adrenaline flowing ! Really nice build, looks like so much fun. Even though it crashed, it's still a fun learning experience. Keeps the mind sharp, thinking of a better way. Not much you can do when it decides to toilet bowl on ya .. Look forward to more 👍
Always the most interesting flying machines on this channel 👍
HEY MAW! Look we can make ANYTHING FLY! 🤣👍 Boy you got your hands full on this one! 👍
You're always surprising us with new aircraft. Very fan of your videos.
That rigid rotor makes like a boomerang as soon as he starts flying forward, with the asymmetric lift and the gyroscopic effect it has to turn around and come back. 😉😂
Awesome god idea man
Ran, Im an old RC designer/inventor from waaay back. In the mid 2000's I was designing a 'craft' that uses a very similar principal except it is more of a 'UFO' recognizable design. I have a whole folder of maybe 25-30 drawings as well as patents on saucer designs. There is several designs I started and had great success with but technology at the time was not sufficient to complete it. I have the original testbeds of my designs and with your technology and my design, I'm positive my original 'flying saucer' could become an easy reality. I would love for you to see these designs as I know you would clue into them in an instant. I'm also sure once completed the design would be patentable and possibly would be like the first micro heli, an overnight viral success especially in the toy industry.
Ran, I have watched (and subscribed) your vids forever and you seem to be the one that would be perfect to team with as you would definitely get a kick out the design/principal ...but I don't know how to email or contact you.You can reach me at my screen name at g.mail if interested.
I wisdom dwell with prudence, and find out knowledge of witty inventions. Proverbs 8:12
Yes Ran always fun projects. Thanks wcolby 1 for the video.
Сумрачный тевтонский гений !
Great idea and cool concept. I believe the rotors are out of balance, and / or as the blades rotate they are creating different amounts of lift. A helicopter blade compensates for this as the angle of attack is constantly changing through the whole 360 degrees of travel.
Watching this makes me laugh....lol. Ran D.'s commentary was priceless....lol.🤣
Fisato con questo progetto nooo Flyht nooo
That buzzing is making me feel unsettled while using headset
I think the Germans tried to make one similar to yours but they used jet engines on the outer 3 wings a Focke-wulf triebflügel at least yours actually flew 👍🏾👍🏾and I have recently seen TH-cam videos of people making the German model of the aircraft but the aircraft failed to lift off
I wish I understood the flight theory better, but it sure is interesting.
great stuff, as always , Ran D , and thanks wcolby1 for posting !
Well, that was cool. More please.
That’s a strange little office chair you’ve got there 👍
very hard work... thank you
Mysteriös und kurios 🤔😂😂😂😂😂👍🛸🍀
Do you post anywhere else? insta, fb group? I'd love to see more of this madness.
That is AMAZING...
Looks like you are trying to make a tri-blade version of the Air Hogs Switchblade. If you are able to self level the rotating wing, then spindle launch it and ditch the other parts. At altitude, pop into FFF, and fly away as a tail sitting tri-wing.
maybe you should've mounted the IMU 90 degrees to the intended direction. I feel the spiral it showed during the transition was due to the gyroscopic effect of the massive rotating wing. So it should be flown like a helicopter which accounts for the gyroscopic effect.
Might be a dumb question but how would you ever balance something like that. I mean without having vibration issue or does it work pretty smoothly, by the first spin up, it looked like it low tolerances in the spin axis.
impressive feasability study, but I don't see a single advantage, though a lot of counterproductive complexity + a prototype that seems not even statically nor dynamically balanced?
2 counter-rotating centrally driven props might do much better?!?
Looks like the CoG is tail end heavy.
this hobby needs more youngins to build dreams if faa dont shut them out
No..you landed that very well.
I am not sure how you would be able to tell where FULL UP is with this model. See comment at 3:55
So ... is That why Flying Saucers sound like they do in movies from the 50s .... The Wobble :/
swirly = controls 90deg out of phase?
So its been a year. What's your progress?
Valeu pela ideia
Gotta love gyroscopic precession, eh? :D
Somethings out of balance and its wanting to shake itself to bits ! Maybe if top was same dia. as the middle ??reminds me of a flying swivel chair !!!
Is Ran D St Clair OK?
👍
Need to shift uppers down and down to be upper
looks like the base of a chair flying upside down.
If it had more thrust which means more speed it would have been successfull
Muito legal, só falta voar na vertical!
Digo , quando decolar, voar na horizontal.
Should have gave it ‘full down’! 😀
was pretty damn cool anyway
Sounds like 2001: Space odissey
How the heck did I not film this?...lol.🤣 This qualifies as a "contraption"....lol
hey spin guy i hear nasa is hiring jk lol it flew so not bad
The Germans at the end of the second world war had a design similar with 3 rocket motors
Make a 3d printed one
Ohhh W@@W Ran D. Only You Would Try To STOL Fly An Office Chair Base!? LOL Back To The Drawing Boards...
Lol... Someone posted on FT and uploaded an office chair base and wanted them to get it to fly... I posted Peter Sripol could do it, he enjoys that kind of thing. Does look a bit like one though.
Это что за гравицапа?
It like a triebflugel
Что только незделаеш, ради любимой.
QUiDiABEiSTO.
Its a bird,,, Its a plane,,, its....its...its... I have no idea
Good try, but this design would never work, it’s just too complicated
😳
ಸಿಲ್ವರ್ ಪೈಪ್ ಬಳಸಿ
Preflight PIOs? You had control until it crashed. Proof of concept: Fail. Nice try though.
похоже у хвостолобиков стырили....
3000th view
🥴🥴🥴🤣🤣🤣🤣🤣👍👏👏👏👏
Que feo jajajaja pero innovador
😂
That experiment is a waste of time and money
Exactly! Please stay where you are, buy the things that you see on tv and make sure they fly themselves, that way you can be just like every other child that fears new things. We (Ran) will be out having fun & trying new things.
🤦🤦🤦🤦🤦
totally wrost