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Hamilton Standard prop conversion. Pulls better than the Russian prop , and much smoother

ok thanks. great polish plane with russian prop. however 3 spades works better (I'm not gonna argue,cause I'm sure you're right) 4 spades looks/sounds better. doesn't it? ;)

Przemysław R American prop attached to a Russian engine attached to a polish airframe. I had one for several years. It actually sounds better than the Russian 4 blade and much more efficient.

I do not think so. 4 blades give you more dragging power than just 3. Dromader builders did not install 4 blades just for fun. Especially that Dromader propeller is shorter, because of shorter landing gears, than in An-2 and gives 20kg power less.

Oh, I thought it was the same as in An-2. Thanks for clarifying that!