- 行业: 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 drill with a hole through its center. Air or liquid lubricant can be pumped through a hollow drill into the hole being drilled, to make it easier for the drill to cut, and to remove chips from the hole.
Industry:Aviation
A driving or holding link used in a ratchet mechanism. The pawl allows a ratchet wheel to turn in one direction, but keeps it from turning in the opposite direction.
Industry:Aviation
A drop in voltage in an electrical circuit caused by current flowing through a resistance. The amount of potential drop, which is also called a voltage drop or an IR drop, is determined by both the current and the resistance.
Industry:Aviation
A drum-like scale, marked in degrees, from 0° to 360°, fastened around the float in an aircraft magnetic compass.
The magnets align the float with the earth’s magnetic field, and the compass card, which is read opposite a fixed lubber line, shows the pilot the direction the nose of the aircraft is pointed relative to magnetic north.
Industry:Aviation
A drum-shaped cam in a hydromechanical fuel control whose outer surface is precision ground in such a way that followers riding over it as it moves up and down and rotates move mechanical linkages to control the fuel according to a preprogrammed schedule.
Industry:Aviation
A dry-cell battery used in vacuum tube radios to supply power to the heaters, or filaments, of the tubes.
A-batteries usually have a voltage ranging between 1.5 to 6.0 volts and are capable of supplying a reasonable amount of current.
Industry:Aviation
A duct installed in the compressor outlet in a turbine engine to reduce the velocity of the air leaving the compressor and increase its pressure.
Industry:Aviation
A duct that has a decreasing cross section in the direction of flow (convergent) until a minimum area is reached.
After this point, the cross section increases, or becomes divergent. Convergent-divergent ducts are called CD ducts, or in the United Kingdom, con-di ducts.
Industry:Aviation
A duct, or passage, that surrounds an object. An annular fan-discharge duct surrounds the gas generator of a turbofan engine.
Industry:Aviation
A duct, or passage, whose cross-sectional area decreases in the direction of fluid flow.
Industry:Aviation
