ORIGINAL: RocketRob
What do you guys think of a APC 4.75x4 combat prop?
larger hub to ream for the tokki prop adapter and bit wider blades than the 4.2x4
Bet CPknows about it?
APCalso has a 4.5x4 which is popular with the mouse racers. A well tuned mouse racing reedie will turn it around the 20K+ mark. Might be worth trying to get a data point at 4.2x4 4.5x4 and 4.7x4 - all being roughly equal or as equal as you could get off the shelf, short of putting the engine on a dyno (and hopefully the prop coefficient for these three being close) you might be able to infer a bit better the torque curve of the stock motor.
cheers, Graham