The original Flite Test Power Pack C used to have the GT2215 with a 30A Emax ESC and either a 10 x 4.5 or 10 x 4.7 HQProp propeller, I honestly don't remember which. I've flown numerous flights with my Sea Duck using two of these motor/ESC/Prop combos and later, reused the same motors with a set of 10 x 4.5 props on my P-38. You'll have no problem flying with that prop.