Nick, i am still struggling a little to understand how the downward anhedral tips control the tip vortex to create extra lift at low speed. Does the centrifugally accelerated outwash force the vortices above the tip path plane, to push up local foil velocity? Alternately does the shape just better match the inflow (like a bell mouth)? At 5 to 7% FM increase they clearly work.
When looking at images of a static Comanche it always seems that there is some blade droop, yet these are very rigid blades. Is this actually the anhedral i am seeing?
Mart