- 行业: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
A gear arrangement in which the output shaft turns more slowly than the input shaft. A reduction gear train is used to increase the torque produced by a motor.
Reed and Prince screw. A form of recessed head screw that can be driven with a power screwdriver. The cross cut into the head of a Reed and Prince screw has straight sides, and the bottom of the recess is a sharp V.
Industry:Aviation
A gear used to reverse the direction of rotation of another gear without changing its speed of rotation. An idler gear does not add nor take away mechanical advantage from the gear train.
Industry:Aviation
A gear wheel with teeth radiating outward around its periphery. The term spur gear comes from the fact that this type of gear looks much like the rowel, or toothed wheel, that was a part of the spur worn by many of the early-day cowboys.
Industry:Aviation
A gear whose teeth are cut across its face in the shape of a V. A herringbone gear is similar to two helical gears whose teeth run in opposite directions, mounted side-by-side on the shaft.
Industry:Aviation
A gearbox containing a cluster of gears, mounted on a machine tool such as a lathe. These gears allow the speed ratio between the drive motor and the work to be changed easily.
Industry:Aviation
A gear-driven centrifugal air pump installed inside a reciprocating engine. Fuel and air are mixed in the carburetor, and the mixture is compressed by the internal supercharger before it is distributed to the cylinders.
Industry:Aviation
A general classification of electromagnetic radiation having wavelengths between 0.3 and 30 centimeters. These wavelengths correspond to frequencies between one and 100 gigahertz (1 x 109, and
100 x 109 hertz).
Microwave radiation falls between infrared waves and radio waves, and many of the principles which apply to the transmission of light also apply to the transmission of microwave radiation. Microwaves used in communications are transmitted from antennas mounted in dish-shaped reflectors and are concentrated and aimed in much the same way as a beam of light.
Industry:Aviation
A general name for all of the hand-held tools a technician uses when performing aircraft maintenance.
Industry:Aviation
A general name given to tar-like hydrocarbon materials. Bitumens are the last of the products left in the fractional distillation of crude oil. Asphalt and tar are two common bitumens.
Industry:Aviation
A general term for a cyclone that originates over tropical oceans. By international agreement, tropical cyclones have been classified according to their intensity:
* Tropical depression — winds up to 34 knots
* Tropical storm — winds of 35 to 64 knots
* Hurricane or typhoon — winds of 65 knots or higher.
Industry:Aviation
