ORIGINAL: cruzmissile
no, a 12X8 is too big. The largest you want in an 11X6 or 11X7. Saito 72, is not the same as a 50SX. The 12in prop would put too much of a load on the engine and it won't allow the engine to rev up to proper RPM speeds. A .
The problem with the 12-8 is that it has too much pitch. The 50SX can turn 12 inch props like a 12-4, 12.25-3.75 or maybe 12-6 max, but that would be better for 3D.
I agree the 11 inch props would be better for sport or pattern.