"Jan Carlsson"
:

To save weight, if an alu prop weight 30 lb. a birch will be 7 lb.,
mahogany 5.5 lb.

for efficiency, use the aluminium!


Well, in this case the prop would be very efecient indeed. It's a 76 inch
ground adjustable Ham Standard with a very nice section. That menas, of
course, that I can screw around with the pitch to get the perforamnce I
need.