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Aviation
Dealing with vehicles or machines used in flight or propulsion through the air.
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Aviation > Airplane flying 
headwind component
Aviation; Airplane flying
The component of atmospheric winds that acts opposite to the aircraft’s flightpath.
high performance aircraft
Aviation; Airplane flying
An aircraft with an engine of more than 200 horsepower.
horsepower
Aviation; Airplane flying
The term, originated by inventor James Watt, means the amount of work a horse could do in one second. One horsepower equals 550 foot-pounds per second, or 33,000 foot-pounds per ...
hot start
Aviation; Airplane flying
In gas turbine engines, a start which occurs with normal engine rotation, but exhaust temperature exceeds prescribed limits. This is usually caused by an excessively rich mixture ...
hung start
Aviation; Airplane flying
In gas turbine engines, a condition of normal light off but with r.p.m. remaining at some low value rather than increasing to the normal idle r.p.m. This is often the result of ...
hydraulics
Aviation; Airplane flying
The branch of science that deals with the transmission of power by incompressible fluids under pressure.
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)