a wrote:

My aerodynamic question had always been why there are fewer pusher
props. In a puller some of the wind energy is used up against the
airplane.

In a pusher, the prop has to operate in turbulent air stirred up by the
structure in front. Depending on the design of the airplane, the prop
also has to be stronger (e.g., heavier) to withstand the cycling loads
if there's a wing or something blocking part of the prop disk from the
slipstream (think Long-EZ).


Ron Wanttaja