This motors could be a good choice for your plane , been there ..

http://www.hobbyking.com/hobbyking/s...ner_Motor.html


http://www.hobbyking.com/hobbyking/s...ner_Motor.html

Volts times amps equals watts.

Figure 150 per pound or so watts for normal flight....200 plus for crazy power flying.

Match your prop to the motor/KV and you are good. Its simple and works every time