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Hot Topic (More than 10 Replies) E. Fillon Rubber Powered Helicopter (Read 5354 times)
Shtefan
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Re: E. Fillon Rubber Powered Helicopter
Reply #10 - Nov 23rd, 2022 at 7:39am
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https://www.youtube.com/watch?v=Gm02zUzmLtU
It happened 13 years ago. Then I didn't know balsa and rubber TAH-2(FAI) yet
  
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Sky9pilot
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Re: E. Fillon Rubber Powered Helicopter
Reply #9 - Nov 22nd, 2022 at 12:57pm
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Awesome video.  Would love to see that in a bigger area.
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Shtefan
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Re: E. Fillon Rubber Powered Helicopter
Reply #8 - Nov 22nd, 2022 at 4:09am
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The Fillon's copter has a gearbox located in the rear of the fuselage.
I pay attention to this, because I get models with rear centering.
Therefore, on my model I placed the gearbox in front.
In addition,  I lengthened the nose by 1/2 inch, instead of a scale.


I also on the R44 model shifting the center of gravity by tilting the rubber motor.
The rubber motor survives bending by 20 degrees well without a gimbal mechanism. As on this model: https://www.youtube.com/watch?v=MTBUVc9kz5k
  
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thymekiller
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Re: E. Fillon Rubber Powered Helicopter
Reply #7 - Nov 21st, 2022 at 4:18pm
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LOl, I will when I get back to them. I need to unpack that stuff.

Thanks for the tips, I appreciate them.
  

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Shtefan
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Re: E. Fillon Rubber Powered Helicopter
Reply #6 - Nov 21st, 2022 at 3:57am
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thymekiller, I watched the videos.
I think that the reason for flying with large rolls is the insufficient performance of the flybar. I recommend increasing the length of the flybar, replacing the blades with lead weights. A free-flying model needs more stability. It is given by the gyroscopic moment of the flybar.


PS Of course, radio-controlled helicopter models use blades on the flybar, because stability and controllability are needed there (two factors)
  
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thymekiller
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Re: E. Fillon Rubber Powered Helicopter
Reply #5 - Nov 17th, 2022 at 9:40pm
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pb-guy, I think your right.  Thank you.

I have one that I thought comet made that tried to fly. It was mostly wire. I will try to find it and post a pic. It might not be a comet. I cant remember.

https://www.youtube.com/watch?v=tvFa211TyPQ

https://www.youtube.com/watch?v=-29T7rx3KJ0

The 2 main issues I found was the torque required is alot more than people think, and the center of gravity is too close to the center of lift to be stable. Like those ww1 airplanes with the nose super close to cg, they are prone to go where ever the wind blowns them.

Shtefan, I think you are correct about rods and gears.
  

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pb_guy
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Re: E. Fillon Rubber Powered Helicopter
Reply #4 - Nov 16th, 2022 at 9:44am
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The Comet Sikorsky R-6 was a non-flying model chopper.
See: https://outerzone.co.uk/plan_details.asp?ID=159
ian
  
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Shtefan
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Re: E. Fillon Rubber Powered Helicopter
Reply #3 - Nov 16th, 2022 at 3:44am
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It's very nice when someone likes my work. I've put it off until better times, I'll try to come back next summer. But I bought a small JET
BD-3 lathe for making shafts, hubs, etc. I also purchased various carbon rods. All this will allow me to create a more productive design. Fillon's copter has flexible shafts, but it was he who inspired me. I don't like flexible shaft. I like bevel gears, gears are not as difficult as it seems. I'm not indifferent to mechanical watches.
I have the subject "MI2 rubber powered" here, there you can see the details
what is comet model plan for helicopter?
  
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thymekiller
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Re: E. Fillon Rubber Powered Helicopter
Reply #2 - Nov 15th, 2022 at 9:30pm
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Love your vids!!
   
That plan looks complicated. Have you tried It?
Seems like gear drive is needed for the torque, but I have not been able to build a set to withstand the torque. Have you?

Also, have you tried the comet model plan for helicopter?
  

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Shtefan
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Re: E. Fillon Rubber Powered Helicopter
Reply #1 - May 12th, 2022 at 7:31am
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E. Fillon Rubber Powered Helicopter
Apr 22nd, 2015 at 5:26pm
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E. Fillon Rubber Powered Helicopter Plan
  

( 334 KB | 192 Downloads )
Fillon_Heli.gif
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