Mr Shadow

hi everyone...

the thing i wanna know is that what adds blade numbers of

propeller to the r/c plane...i see big part of r/c planes have 2

blade prop.making these 3 or 4 blade prop. is hard or these type

of propellers using for warbirds? (5 blade for spit and 4 blade for

p-51 typically...)

thanks bny now...

BingoFlyer

Three and four bladed prop have an efficiency problem with two cycle and most four cycle engines because the added blades travel too close to the blade in front of it and is actually in the slip stream thus has little air to move. Those larger war birds using three/four bladed props use a reduction system so they turn slower. Hope this makes sense to you.

Mr Shadow

thank you so much...