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Aviation
Dealing with vehicles or machines used in flight or propulsion through the air.
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Aviation > Powerplant 
beta control range
Aviation; Aircraft maintenance
The range of operation of a turboprop powerplant used for in-flight approach and ground handling of the engine and aircraft. Typically, the Beta mode includes operations from 65% ...
performance number
Aviation; Aircraft maintenance
The rating of antidetonation characteristics of a reciprocating engine fuel that is better than the high rating reference fuel, iso-octane. Performance numbers are greater than ...
kinematic viscosity
Aviation; Aircraft maintenance
The ratio of the absolute viscosity of a fluid to its density. Kinematic viscosity is measured in centistokes.
thermal efficiency
Aviation; Aircraft maintenance
The ratio of the amount of useful work produced by a heat engine, to the amount of work that could be done by all of the heat energy available in the fuel burned.
fan pressure ratio
Aviation; Aircraft maintenance
The ratio of the fan-discharge pressure to the fan inlet pressure.
bypass ratio
Aviation; Aircraft maintenance
The ratio of the mass of air moved by the fan to the mass of air moved by the core engine.
turbine engine compression ratio
Aviation; Aircraft maintenance
The ratio of the pressure of the air at the discharge of a turbine engine compressor to the pressure of the air at its inlet.
Sub-categories
- Aeronautics (18944)
- Air traffic control (14233)
- Aircraft (22883)
- Aircraft maintenance (1634)
- Airframe (736)
- Airline (2189)
- Airplane flying (18062)
- Airplanes & equipment (4488)
- Airport (11900)
- Avionics (154)
- General aviation (1759)
- Helicopter (80)
- Jet engines (2630)
- Powerplant (618)