RE: OS .75AX users please post prop sizes
G'day Mike,
I ran my 75AX in on an APC 13x7, in a 60 size Diabolo, it spins it like a toothpick, now I'm running an APC 14x8, the engine handles it easily, & flys the plane beautifully, remember it's ported for larger props.
Depending on what plane you put it on, it would easily swing up to a 15x7.