Aviation

Aviation

Dealing with vehicles or machines used in flight or propulsion through the air.

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Aviation > Powerplant

notch sensitivity

Aviation; Aircraft maintenance

A measure of the loss of strength of a material caused by the presence of a notch, or a V-shaped cut.

equivalent shaft horsepower (ESHP)

Aviation; Aircraft maintenance

A measure of the power produced by a turboprop engine. ESHP takes into consideration both the shaft horsepower delivered to the propeller and the thrust developed at the engine ...

microinches rms

Aviation; Aircraft maintenance

A measure used for cylinder wall surface roughness. Twenty microinches rms means that the highest and lowest deviation from the average surface is 20 millionths of an inch.

saybolt seconds universal (SSU) viscosity

Aviation; Aircraft maintenance

A measurement of viscosity (resistance to flow)of a lubricating oil. The number of seconds needed for 60 milliliters of oil at a specified temperature to flow through a calibrated ...

micron

Aviation; Aircraft maintenance

A measurement used to identify the size of particles trapped by filters. One micron is a micro meter, or one millionth of a meter. It is 0.000039 inch.

heat engine

Aviation; Aircraft maintenance

A mechanical device that converts the chemical energy in a fuel into heat energy. The heat energy is then converted into mechanical energy and useful work.

commutator

Aviation; Aircraft maintenance

A mechanical rectifier mounted on the armature shaft of a DC generator or motor. It consists of a cylindrical arrangement of insulated copper bars connected to the armature coils. ...