Your links only give the summary, which doesn't describe the airfoil itself or identify what alternative it was being compared to. Do you have that information, or pointers to it?
A little googling found the description of the profiles in question. Stall regulated, so no furling required, simplifying the mill. (Haven't gone deeper yet.)
everywhere i have read seems to suggest that developing a stall regulated rotor is quite aerodynamically complicated. the twist needs to be just so. this might be more than i'm ready to tackle, but would be interesting to look into. trusting something without a furling tail... i guess it depends how confident i become on learning about blade design. there are certainly a lot of resources out there.[ Parent ]
