Mart,
The fact that the engineering numbers describe a machine with good payload-range performance ....
Would you please provide the source of this fact.
Thanks
Dave
PS.
Here is another interesting article on coaxials that you might like.
A Survey of Theoretical and Experimental Coaxial Rotor Aerodynamic Research
Last edited by Dave_Jackson; 2nd March 2008 at 19:19.
Reason: Addition of PS