Dave,
No need to answer if your busy.... but since you brought up the subject of improving the lift drag ratio in your last post....
Why is a helo rotor so much lower in L/D than a fixed wing? In your opinion.
I assume the huge difference in rotational speed along the blade averages out to a lower L/D.
Just a thought...
Maybe multiple smaller intermeshing rotors (like 8 or 10 rotors for instance) would give a better L/D because the downwash would be more uniform. And the entire disc area would be pumping air down, not just the outer part of the disc as in a conventional rotor. Just a thought, probably whacky. Maybe that is partly why you like intermeshers!