Need advice on designing a light weight tail rotor drive system

skyguynca

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I am looking to make the lightest and simplest tail rotor drive system. I keep coming up with the old style long belt drive system as being the lightest and simplest.

Anyone have some advice to a better method?
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Thanks
David
 

Kevin_Richey

Yamaha gyro...Oregon, USA
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Not having any personal experience w/ the Rotorway Scorpion, but I remember hearing that those long belts easily stretched, causing lack of proper anti-torque pedal authority.

Once @ a chapter mtg. @ Lenhardt's airport, Jack Lenhardt was running up his Scorpion. He lifted off to a hover of a couple of feet.

The machine started spinning, & he abruptly set back down. I waited for him to shut down to inquire.

He explained that the tail rotor belts had stretched out, causing the start of the rotation, so he dropped it down as fast as he could.
 

gyrojake

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Nothing beats a 3/4" X .065" tube with 2 bearing supports, within a 4" tube, for small home made choppers with a 10' to 12' boom.
Clean, quiet and benefits are greater than the extra weight.
 

skyguynca

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3/4x.065 4130 dynamically balanced?

I could do that in-house but then I would need a 90deg tailrotor gearbox I can also build in-house,.
I can not find plans for that. Been looking.

Since I am trying to keep as ultralight needs to be a very light gearbox too.

Thanks
David
 
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