Originally posted by Ollie
There will be a combination of three things that will produce maximum thrust for a given prop. The engine has to be operating at the RPM where the power peaks. The prop has to be pitched so that it gives just the right slip for the airspeed. The prop blade width, diameter and pitch have to load the engine to the peak power engine RPM. This is complicated enough that the best way to achieve results by the trial of various props.
Oliie, you are absolutly right, as usual, but I just would precise "in flight", as it does not seem obvious to everybody....
"The engine has to be operating at the RPM where the power peaks
in flight. The prop has to be pitched so that it gives just the right slip for the airspeed. The prop blade width, diameter and pitch have to load the engine to the peak power engine RPM
in flight.
I see very often engines setup at Max RPM on the ground, and the pilot wonder why flights characteristics are not that great! The only exception might be 3d, as the "speed" targeted is zero.....!
Bernard