t'aint natural
Thanks for the reprint of autorotation in the Brantly, and your correction of my error.
The inquiry has to do with autorotation using a pair of hypothetical rotors where the airfoil does not start until about 30% of radius, also, most of the lift is on the advancing blades (ABC) whereas the stall region has been shifted toward the retreating blades during forward flight. The unusual configuration of the Brantly was therefor of interest and it appears that it functions very well. Thanks.