RE: Great Planes F-14
at 7.5 lbs will need a motor putting out about 800w to get any sort of performance, high Kv motors wont really suit as prop will be too small, as an example normally a 2200kv motor will suit a 6x4. Look a motor wattage for a given prop size, to get any sort of performance you are going to be looking at 60A plus, if it was me I would want about 1000w.