The motor we have is rated at 200 watts and 16.6 Amps and I dont want to do any hardcore flying. I most likely want to shoot for the trainer category. The 4000mAh battery weighs about 13oz and our plane is made out of foam and does not weigh much. Altogether I expect the plane to weigh about 32oz or 2lbs. Is my battery really to heavy?

Motor is 200 watts. Using 80 watts per pound * 2lbs I get a need of 160 watts right? So the battery shouldn't be a problem?

Also would you guys recommend a 20 Amp esc for me since I fried the first one? Are there any other specs I should look for when choosing an esc for my setup?