A prop is a wing that flies in a circle.  Right?  The most efficient

wings (the ones that put on gliders), are very long and thin to get a

high aspect ratio.  Right?  Given this premise, it only stands to reason

that the best prop would be the longest one that would leave some ground

clearance, and then absorbs any remaining Hp by increasing the chord.

 

That's my story, and I'm sticking to it (unless I'm wrong).

 

Nice try, Ernest; but the term ‘gross over-simplification’ comes to mind J.  With this wing; every increment is traveling at a different speed, has a different AOA; and it’s always making a sharp turn. Not to mention various turbulence factors, material stress, etc; but then I know you knew all that.

 

Al