View Single Post
Old 12-14-2010, 12:33 PM   #11
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 22,553
RE: Borg Warner velvet drive question

"I have been told the four blade would be more efficient."

Efficient can have a lot of meanings.

For slow cruising a 2 blade would be even better than the 3 blade , IF you could swing the prop diameter .

IF your current prop is not loading the engine properly at Flank, you may gain a bunch more Knots , if that is your "efficiency".

Yes, there were 1 bladed aircraft props , way back , with a balance weight , but a big diameter is easy on a small aircraft with a puny motor.
FF is offline   Reply With Quote