- المجال: 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 circuit that shifts the phase of an alternating current signal. A phase shifter causes the output signal to either lead or lag the input signal.
Industry:Aviation
A circuit used in a multiengine generator system that causes the generators to share the electrical load equally. A low-resistance shunt, called an equalizing resistor, is installed between each generator and ground so all the current produced by the generator flows through it. The voltage drop across the equalizing resistors is sensed by the voltage regulators to control the output of the generators.
When one generator carries more than its share of the load, the voltage drop across its equalizing resistor is greater than that across the resistors of the other generators.
The voltage regulators sense this difference and decrease the voltage of the generator carrying the greater part of the load, and in this way force the other generators to carry their share.
Industry:Aviation
A circuit which changes the frequency of alternating current. Alternating current with a frequency of 1,000 hertz, for example, can be changed to 200 hertz by combining it with an AC signal having a frequency of 1,200 hertz.
When alternating currents having these two frequencies are combined, or mixed, two more alternating currents are produced: one having a frequency which is the sum of the two, 2,200 hertz, and the other a frequency which is the difference between the two — in this case, 200 hertz, the desired frequency.
Industry:Aviation
A circuit which displays multiple contours of echo intensity simultaneously on the plan position indicator or range-height indicator scope.
Industry:Aviation
A circuit within an aircraft electrical power system that maintains the frequency of the alternating current within specified limits.
Industry:Aviation
A circular cam mounted on a shaft, with its center different from the center of the shaft. As the shaft rotates about its axis, the outside of the eccentric rises and falls, changing rotary motion into linear motion.
Industry:Aviation
A cirriform cloud in the form of thin, white featherlike patches or narrow bands. Cirrus clouds have a fibrous and/or silky sheen. Large ice crystals often trail downward for a considerable vertical distance in fibrous, slanted, or irregularly curved wisps called mare’s tails.
Industry:Aviation
A cirriform cloud that appears as a thin sheet of small white puffs resembling flakes or patches of cotton without shadows. Cirrocumulus clouds are sometimes confused with altocumulus.
Industry:Aviation
A cirriform cloud that appears as a whitish veil, usually fibrous, but sometimes smooth. Cirrostratus may totally cover the sky, and often forms a halo around the sun or moon.
Industry:Aviation
A cirrus cloud with a curve on one end and a long flowing tail on the other.
Industry:Aviation
