You have look at the kv ihe higher the kv the more rpm with a smaller prop.I would guess you would need somewhere in the 1000 kv range for a 10 inch prop.My plane weight is around 8 lbs with a turinigy 5055 700kv it gps rite at 100 mph level. The motor i have and the way it is proped i pull 50 amp static and between 430 to 470 watts and half throttle around 270 and 300 watts. I get about 6 min. flight time at mixed throttle settings