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Aviation
Dealing with vehicles or machines used in flight or propulsion through the air.
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Aviation > Powerplant 
class A fire
Aviation; Aircraft maintenance
A fire with solid combustible materials such as wood, paper, and cloth as its fuel.
push fit
Aviation; Aircraft maintenance
A fit between pieces in a mechanical assembly that is close enough to require the parts to be pushed together. A push fit is looser than a press fit, but closer than a free fit.
V-blocks
Aviation; Aircraft maintenance
A fixture that allows a shaft to be centered and rotated to measure any out-of-round condition.
butterfly valve
Aviation; Aircraft maintenance
A flat, disk-shaped valve used to control the flow of fluid in a round pipe or tube. When the butterfly valve is across the tube, the flow is shut off, and when it is parallel ...
bimetallic hairspring
Aviation; Aircraft maintenance
A flat, spiral-wound spring made of two strips of metal laid side-by-side and welded together. The two metals have different coefficients of expansion, and as the temperature ...
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)