It would tell us everything from flap settings to engine rpm's and temperatures.

At the same time, the captain increased engine rpm in order to produce more astern thrust.

At higher engine rpm, the intake length is reduced.

They're relatively cheap, but need engine rpm to deliver full output and are best when handling one operation at once.

The function is similar to stalling a converter gearbox at high engine rpm.

An instrument in front of the pilot has two separate needles, one indicating rotor speed, and the other engine rpm.

The engine rpm began to wind up.

The driver then shifted into 4th gear to further reduce the engine RPM.

In a 2-stroke engine, this is the same as engine RPM.

In a 4-stroke engine, this is half the engine RPM.