Gilligan wrote:
"Jeff" wrote in message
I don't know why a 4 blade fixed is a better propeller for a sail boat
(S) Guess I never will (g)
I thought this was a quiz. Why are you asserting that a 4 blade is
"better"? BC was just trolling with his post - he really has no idea.


Don't four blades have a greater Diameter Area Ratio than 2 or 3 blade
props. Doesn't the greater DAR give greater thrust?


I think you mean "Disk Area Ratio." It is certainly easier to have a
larger DAR with a 4-blade prop, and that generally implies more thrust
in a low speed application.

But it does not necessarily follow that this is better for any boat
other than a tugboat.