RE: Best Prop for a F4U Corsair & Extra 300?
The prop question is dependent on how you want to fly... just speed, use the largest bight of air you can get i.e. ??x8 or more. For 3d, a 4 is good for pulling but lacking in speed and you can over rev the engine easier. As for the corsair, I liked the APC on mine better because it is lighter and spun up faster.