ORIGINAL: Jon Wold
ORIGINAL: 8178
I think the 90 would be good but you’ll need a pipe on it to help the balance and give it that extra punch.
I agree, put on the 90, pipe it and enjoy. Only problem swapping 60s for 90s is overpropping, e.g. torque and ground clearance. Use a 12x12 and have fun.
But, the KF III isn't even an aerodynamically slick design. It has a thick, constant-chord wing. If you're going for all out speed with a piped .90 turning a 12x12 why not build a sleeker model?
David