- 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 absolute pressure of between 1 x 10-3 and 1 x 10-6 millimeters of mercury.
Industry:Aviation
An absolute-pressure measuring instrument (a type of barometer) that produces a permanent record of the time and the pressure it is measuring.
Barographs are often sealed and are carried aloft to make a permanent record of the altitude that has been reached by the aircraft.
Industry:Aviation
An abundant, nonmetallic chemical element that occurs in all organic compounds and in many inorganic compounds. Carbon’s symbol is C, its atomic number is 6, and its atomic weight is 12.01115.
Among carbon’s many important uses is that of acting as an electrical resistance element.
Industry:Aviation
An AC generator installed on turbine engines. An IDG incorporates a brushless, three-phase AC generator and a constant-speed drive in a single component.
Industry:Aviation
An AC motor whose rotor is excited by voltage induced into it from the stator windings. A capacitor-start motor has two stator windings: a start winding and a run winding. The start winding is in series with a capacitor that shifts the phase of the current flowing through it, so it is out of phase with the current flowing through the run winding.
The magnetic field produced by the start winding and the field produced by the run winding work together to produce a magnetic field that rotates within the motor housing. The rotor follows this rotating field. When the rotor has accelerated to a specified speed, a centrifugal switch opens the start winding circuit, and the motor continues to operate on the run winding alone. Capacitor-start motors have a good starting torque.
Industry:Aviation
An accelerator in which positively charged particles such as protons and deutrons are accelerated (sped up) by a constant-frequency alternating electric field synchronized with their movement. The particles are held in a spiral path in a constant magnetic field as they speed up.
Industry:Aviation
An accelerometer that measures the rate of change of motion in a straight line.
Industry:Aviation
An accurately ground gage block used as a reference in precision machining operations. A Johansson block (Jo block) is usually ground to an accuracy of at least 0.000 01 inch (0.25 micrometer).
Industry:Aviation
An acid used for etching aluminum alloys to prepare them for painting. Chromic acid reacts with the aluminum to form a durable film on the surface that keeps oxygen away from the metal and inhibits the formation of corrosion.
Industry:Aviation
An acoustic transducer, a device that changes sound pressure into an electrical signal. A diaphragm made of a thin foil of electret is placed next to a metal-coated backplate. Sound pressure picked up by the microphone vibrates the diaphragm and, as the electric field cuts across the metal plate, it generates a voltage. The waveform of this voltage is a copy of the waveform of the sound that vibrated the diaphragm to produce it.
Industry:Aviation
