Hi,

I use a 13x6 with my Saito FA-72 it hovers at around half throttle and flies quite well with this prop... with the AX I would use either a 11x6 or 12x6. Obviously this depends on your flying style, I do not fly 3d and do not think these props are best suited to 3d. The props listed above are your 3d props these are an alternative if you do not want 3d.

Flip over and out!!!