- 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 ...
An electronic filter that passes a band of frequencies with little attenuation (loss in power), while attenuating, or blocking, all frequencies above or below the band it passes.
Industry:Aviation
An electronic filter that rejects, or attenuates, a band of frequencies, while passing with little loss all frequencies on either side of this band.
Industry:Aviation
An electronic filter used to prevent electromagnetic energy produced in an ignition exciter from feeding back into the aircraft electrical system. The filter is made of an inductor with a capacitor on its input and its output. The name is derived from the fact that the three components on a schematic diagram resemble the Greek letter pi (π).
Industry:Aviation
An electronic filter which opposes a certain band of frequencies, but allows all frequencies on either side of the band to pass. A crystal filter attenuates, or decreases the value of, AC signals whose frequencies are near the resonant frequency of the crystal in the filter circuit.
Industry:Aviation
An electronic filter, usually made of capacitors and inductors. A smoothing filter, also called a ripple filter, is installed between a rectifier and an electrical load to remove the ripple from the DC produced by the rectifier.
Industry:Aviation
An electronic flight and navigation instrument that shows the pilot the proper changes to make in directional flight. An HSI shows the pilot the relationship of he aircraft to the VOR radial or ADF bearing, the magnetic direction, the desired course and heading, and also the relationship of the aircraft to the glide slope.
Industry:Aviation
An electronic flight instrument that displays navigation information on a multicolor display. An EHSI is used in conjunction with an EADI.
The information displayed on an EHSI include: magnetic track, aircraft heading, ground speed, distance to go, VOR course, wind speed and direction, ILS display, and a visual display of the flight plan.
Industry:Aviation
An electronic flight instrumentation system that allows the flight crew to initiate and implement a given flight plan and monitor its execution.
Industry:Aviation
An electronic fuel control for a gas turbine engine. The EEC senses the power-lever angle (PLA), engine RPM, bleed valve, and variable stator vane position, and the various engine pressures and temperatures. It meters the correct amount of fuel to the nozzles for all flight conditions to prevent turbine overspeed and overtemperature.
Industry:Aviation
An electronic identification system that is the forerunner of the modern radar beacon transponder used by air traffic controllers to identify specific aircraft. IFF, developed in the latter part of World War II, is an electronic pulse system in which interrogation pulses of electrical energy are transmitted from a ground station and received in the aircraft.
If the airborne equipment is set to respond with the proper code, the IFF identifies the aircraft as friendly. But if the equipment does not reply with the correct code, the ground station is alerted to the fact that the indications received on its radarscope may be caused by a foe, or enemy. The principles of IFF equipment apply to other pulse navigation systems, especially aircraft radar beacon transponders and distance measuring equipment (DME).
Industry:Aviation
