Does anyone have real data that 3 blades are less effiecent or are they just saying it
could it really be that the engine is less effiecent meaning it can't reach it's peack power turning a 3 blade of the same dia and pitch?
if your engine can't turn the same size 3 balde as two blade why is it the props fault also is a 3 blade reallty 1 1/2 props because of the extra blade
On thrust calc if you put a 2 blade and 3 blade in to it side by side the 3 blade always needs more hp to reach the same rpm and it always makes more thrust.
I may have to do some real world testing and see what I get
example if you can turn a 10x6 2 blade 11000 rpm and a 10x6 3 blade 10000 rpm it's seems the 3 blade is more effiecent and is grabbing more air the the engine can keep up with
so it really doesn't mean the prop is less effiecent it just means it too big for that engine
wouldn't the true test of effiecency be turn the same diameter and pitch the same speed and then see which one pulls the plane better
food for thought

and if anyone has any websites about the topic please post them
think I'll put this to the test and see what happens