RE: e Sachs 3.2 prop question
A three blade will not be any "more" scale than a 2 blade. P-47s never used 3 blades. A "scale" 4-blade would need to be 26"-28" in diameter. Don't believe you will ever find a 4-blade that will look correct and still fly the aircraft.
Here's the one I used to have. that 4-blade is just for static display. It's 26" in diameter.