Powerplant

Powerplant

The complete installation of an aircraft engine, propeller, and all accessories needed for its proper function.

Industry: Aviation

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Powerplant

profilometer

Aviation; Aircraft maintenance

A precision measuring instrument used to measure the depth of the hone marks in the surface of a cylinder wall.

A precision steel bar on which a propeller is mounted for balancing. The mandrel is placed across two perfectly level knife-edge plates, and the propeller is allowed to rotate until it stops with its ...

oblique shock wave

Aviation; Aircraft maintenance

A pressure wave that forms on a sharppointed object when air flows past it at a supersonic speed.

run up

Aviation; Aircraft maintenance

A procedure in which an aircraft engine is operated on the ground to determine its condition and performance.

Society of Automotive Engineers (SAE)

Aviation; Aircraft maintenance

A professional organization that has formulated standards for the automotive and aviation industries.

droop

Aviation; Aircraft maintenance

A progressive decrease in RPOM with load in a gas turbine engine whose speed is governed with a fly-weighttype governor in the fuel control. As the load increases, the pilot valve drops down to meter ...