- Industry: 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 type of turbine in which hot, high-velocity gases produce an aerodynamic force as well as an impulse force as they move the turbine blades in the direction needed to spin the turbine wheel.
Industry:Aviation
A type of turbine that uses a wheel similar to the wheel of a centrifugal air compressor. The hot exhaust gases that drive the turbine flow in through its outer rim and out its center. Radial-inflow turbines are used to drive the compressors in turbochargers for reciprocating engines.
Industry:Aviation
A type of turbine wheel turned by an aerodynamic force produced by the turbine blades. This force is similar to the lift produced by an aircraft wing. The blades of a reaction turbine are small airfoils mounted on the periphery of the turbine wheel in such a way that they form converging ducts that accelerate the hot gases passing through them. The high-velocity gas flowing over the reaction turbine blades produces a pressure difference between the top and bottom of the blade. This pressure difference produces a force which rotates the turbine wheel.
Industry:Aviation
A type of turbocharger controller that uses a cam actuated by the engine throttle to maintain a constant upper-deck pressure for each position of the throttle valve. A VAPC differs from an absolute pressure controller (APC) which maintains a constant upper-deck pressure only for full-throttle operation. The bellows in the VAPC controls the position of the valve, but the throttle controls the position of the valve seat.
Industry:Aviation
A type of turbocharger controller which limits the maximum discharge pressure the turbocharger compressor can produce while the aircraft is flying below its critical altitude.
Industry:Aviation
A type of turbofan engine in which the exhaust from the gas generator mixes with the air from the fan that bypasses the gas generator. These two flows mix before they leave the exhaust system of the engine.
Industry:Aviation
A type of turbofan engine in which the fan is the first stage of compression, or N1. The normal low-pressure compressor is N2, and the high-pressure compressor is N3. Each stage of compressor is driven by its own turbine, and the N3 compressor is the only one whose speed is governed by the fuel control. The N1 and N2 compressors rotate at their own best speed.
Industry:Aviation
A type of turbofan engine using a set of reduction gears between the first stage of the gas generator compressor and the fan. By using reduction gears, the fan can turn slowly enough that its tip speed is held below the speed of sound. And at the same time, the gas generator compressor can turn at speeds high enough for it to be efficient.
Industry:Aviation
A type of two-conductor electrical cable in which a center conductor is held rigidly in the center of a braided shield which serves as the outer conductor.
The term coaxial cable comes from the fact that the two conductors are coaxial — they have the same center. Coaxial cable, or coax, as it is normally called, is used for attaching radio receivers and transmitters to their antenna.
Industry:Aviation
A type of two-pole switch that, when switching from one circuit to another, makes contact with the second circuit before it breaks contact with the first.
“Make short approach” (air traffic control). A phrase used by ATC to inform a pilot to alter his traffic pattern so as to make a short final approach.
Industry:Aviation
