RE: Prop Make Question !!!!!!
Personally, I prefer wood, MA and other/APC in that order in the US. I have not tried Graupner props, as they are rather scarce here.
APC props are WAY overrated for what they are. They are supposedly efficient, but who ever checked that?
They are also extremely heavy props. The difference in weight between APC and a wood or even a MA prop might not be so noticeable, but they become quite heavy at larger sizes.
If you dig out your college physics textbook and look up rotational inertia and rotational energy, you will find
rotational energy accounts for most of the total kinetic energy, and rotational inertia is linear in mass and square in radius of the prop. All this means is that you have all but a small fraction of the total amount of energy available from the engine that actually contributes to making the plane move.