Watts is watts?

[Serum]

Yeah, nice that you mention it;

The eddy currents are responsible for the motor not being too efficient on a partial load. (segmented magnets don't suffer as much as solid magnets (or the three thing 'segments' of a feigao/wanderer/nemesis motor, which is considered a non-segmented magnet).

Like you say;

a heli runs on a rather constant RPM. (CP's at least, and i assume you are talking about CP instead of FP choppers) the pitch of the blades determine the load the motor gets. due to that the RPM vary a bit. Not as much as with cars.

Quite simple; my lehner XL2400 powered maxx felt more agile on 3S than my Lehner 2250 powered savage. Both had about the same rpm. The small motors spin up fast. (noticeable for acceleration)

[zeropointbug]

I don't think rotor mass has anything to do with acceleration with a vehicle. Seems to me that if you let an unloaded motor spin up to full speed, it takes what, a mere 20-30ms to do so?

So i don't think this should matter in a truck that weights 10-12 lbs loaded. As that mass of the rotor becomes far INSIGNIFICANT in the acceleration of the vehicle.

The physical weight of the motor, say what you said Serum, about an XL2400 vs. your 2250 motor, i think that's all total mass there.

Just my thoughts.