- 업종: 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 pump in a dry sump lubrication system that picks up the oil after it passes through the engine and returns it to the oil tank. Scavenger pumps have a larger capacity than pressure pumps, because the oil being returned is hot and contains air. Both conditions increase its volume.
Industry:Aviation
A pump that moves a constant volume of fluid with each rotation. Gear pumps, gerotor pumps, vane pumps, and some types of piston pumps are constant-displacement pumps.
Some form of pressure regulator or relief valve must be used with a constant-displacement pump when it is driven by the aircraft engine.
Industry:Aviation
A pump used as an alternate source of hydraulic pressure for an emergency or to produce hydraulic pressure when the aircraft engines are not operating.
Industry:Aviation
A pungent, invisible gas made up of one atom of nitrogen and three atoms of hydrogen (NH3). Ammonia becomes a liquid at -28°F and freezes at -107.6°F.
Ammonia is used to case harden steel by the nitriding process. In this process, the ammonia combines with aluminum, which has been alloyed with the steel, to form aluminum nitride. Aluminum nitride gives the steel a very hard surface.
Industry:Aviation
A pure number which has no dimensional value assigned to it. Ratios, such as Mach numbers and Reynolds numbers, are examples of nondimensional numbers.
Industry:Aviation
A quantity made up of letters, numbers, and other symbols. The parts of the expression separated by a plus or a minus sign are called the terms of the expression.
An algebraic expression having only one term is called a monomial, and one with two or more terms is called a polynomial.
The algebraic expressions AB, 2Y, and 6X2 are monomials. The expression AB + 2Y - 6X2 is a polynomial. It is actually a trinomial, because it has three terms.
Industry:Aviation
A quantity whose value determines characteristics or behavior. Temperature, pressure, and humidity are parameters of the atmosphere.
Industry:Aviation
A quarter part of a circle, centered on a navaid, oriented clockwise from magnetic north as follows: NE quadrant 000°-089°, SE quadrant 090° – 179°, SW quadrant 180° – 269°, and NW quadrant 270° – 359°.
Industry:Aviation
A quarter-wavelength, vertically polarized antenna, normally used for transmitting and receiving radio communications in the higher frequency bands. Aircraft communications in the very-high-frequency (VHF) band normally uses a Marconi antenna whose length is one fourth of the wavelength of the center frequency to be transmitted.
One conductor from the transmitter is connected to the quarter-wave antenna, and the other conductor is connected to the metal structure of the aircraft on which the antenna is mounted. This metal structure serves as a quarter-wavelength reflector. A Marconi antenna is nondirectional (it radiates its signal equally well in all directions).
Industry:Aviation
