The RPM of an aircraft's engine determines its power and speed, with higher RPMs generally indicating more power. General ...

The engine RPM is measured in two independent ways: a mechanical tachometer in the Dynamometer and an electronic tachometer in the display rack. These devices measure the rotation rate of the engine ...

[Tom Stanton] is plenty experienced in that area, having built a series of compressed air engines over the years. His latest effort is capable of running at up to 4,500 RPM, and delivering a full ...