You don't want to run high rpm while sitting still any longer than you had to.

Their benefits include low initial cost and high rpm.

The upside being that this configuration made for less flex at high rpm.

The engines only had a life span of a few hours at high rpm before grinding to a halt.

Special brushed motors are capable of such high rpm, but require even more maintenance as a result.

The smaller lower rotor spins at a higher rpm, with about 60 percent of the load.

At higher rpm, the valve opens to allow more exhaust flow for increased boost.

At high rpm, both intake valves open fully to improve engine breathing.

David Hall: I don't like that the engine races up to high rpm though you're taking off gently.

The transmission screamed into high rpm's, then it too shattered and disintegratled.