Derp. Volts govern rps, my bad. That said, any estimates on the max voltage that won't damage the gearbox?

This post has been edited by RedStar: Jan 4 2012, 04:05 PM

Depends what you mean by damage. I think you could run a 9.6v NiMH fine. Any more than that, you risk wear on your trigger contacts. But that's just the trigger contacts potentially, and not necessarily the whole gearbox. A significantly higher rate of fire (let's say, 10.8v NiMH or 11.1v lipo) would also put wear on the plastic bushings and possibly strip the piston. Or, maybe just the motor would short out.

Lots of possibilities. I would say 8.4v NiMH the safest, and next up a 9.6v NiMH. Don't go lower than 8.4v NiMH (such as 7.2v NiMH) because you still want the minimum amount of power for functional performance.