Join Date: Dec 2005
Thanked 0 Times in 0 Posts
Rep Power: 11
You have asked a complex questions, to which there are varying answers. If you do a search on this website, you will find several posts comparing feathering and folding props, and also some pointers to websites where they compared feathering, folding, maxprop, 2 blade and 3 blade props for resistance while sailing and for thrust in forward and reverse while motoring.
As I recall, the best were the folding, followed by feathering, then 2 blade, then 3 blade for least resistance while sailing, and I think in reverse order for motor thrust.