RE: Use watts to measure motor power?
You're on the right track BeFlyin
As a rough rule of thumb you can use this as a guide to performance with watts per pound:
Watts per pound Performance capability
Less than 50 watts per pound Unlikely to get off the ground
50 to 60 watts per pound Can perform simple aerobatics
60-75 watts per pound Will loop from level flight. More aerobatic capability
75-100 watts per pound Warbird fighting capability. Aggressive climbs
100-150 watts per pound Long vertical climbs. Unlimited aerobatics
More than 150 watts per pound Every type of 3D maneuver