"...Interleaving configuration offers the advantage of a large disk area for hover..."
But my arguement is that is doesn't. Although not as bad as say the V22, the machine will never be as compact as say coaxial for the same disk loading. It's just that if you consider only weight and not span, use of teetering will allow a very high roll rate for improved payload/MAUW over the coaxial. The size definately limits it's applications to large airfields only.
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"...The (Comanche) blade had a stiff torque tube so that feathering could be accomplished by spar deformation without bearings."
Hard for me to visualise how this would work, unless you mean a compliant bush?
"The blade had a damper on the torque tube that tied the spar to the tube, and absorbed inplane oscillations."
Again, difficult to visualise without pictures, since most of my web search revealed only descriptive tech paper abstracts. When looking at hub close-ups it seemed to me that hydraulics were used to slide blade along tube, using coriolis force to correct blade lead/lag - effectively damping the in plane vibrations.
100'/sec is an amazing roll rate for a heli - however it works!
Mart
[Edit: To clarify my confusion about Comanche hub design]
Last edited by Graviman; 11th October 2005 at 16:54.