How do I calculate the power of a generator in terms of speed?

[Ballena Joseph]

Main Question or Discussion Point

Hi, here I am again. This is also related to my previous threads. My question is: How do I calculate the power of generator in terms of speed(rpm) from a drive system (such as belt and chain drives)?

 

[anorlunda]

Power = torque times RPM. Be careful with the units.