PPRuNe Forums - View Single Post - what is the best helicopter in autorotation
Old 7th Feb 2005, 21:50
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Dave_Jackson
 
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zeeoo,

It will be interesting to see how they do it. It could result in a safer gyrocopter. Hopefully, it might also be a first step in eventually getting helicopters included in the Sport Plane/pilot category.
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"BTW some 3 bladed gyros (lioré and la cierva) didn't have a helicopter-like cyclic control but a "teetering" 3 bladed one with an offset gimbal....."

Interesting. I assume from your comment and sketch that the blades have a very small offset hinge and then the hub is mounted on a gyrocopter style of gimbal. Perhaps this is why it has been mentioned that the larger gyrocopters required excessively large cyclic control forces.

I suspect that a minimal offset will result in acceptable cyclic control input forces, whereas a larger offset will result in crisper maneuvering. Pick one. The 'Sunday driver' will require both and this probably necessitates a conventional helicopter flight-control system.

To add to the subject, the following is the spider control used on the Ciarva W-11 rotor.



Dave

Last edited by Dave_Jackson; 7th Feb 2005 at 23:36.
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