Originally Posted by
Graviman
Interesting that top rotor diam is now smaller than lower rotor.
Mart, if you look closely, I think you will find the projection of the top rotor span to be approximately 0.707 of the bottom rotor span. And, the bottom rotor seems to picture a blade forward, aft, and one pointing out of the page. The top rotor only seems to have a blade forward and aft. Why do you think this is?
Here's a hint for you (and Dave): What's the sine of 45 degrees?
-- IFMU