You need to get software to help you size motors to planes. I use electricalc which is available lots of places for abour $40 Maxcim motors has it. Motocalc is good also and you can download it free for 30 days. Just type in Motocalc in your search. Either will teach you more than you wanted to know about electrics. It is very complex to size a motor, gearbox, cell type, cell size,cell count, diameter , pitch and type of prop and this software has all the answers! It will give you stall speed, climb rate, top speed,wing loading, and run time.