- 産業: 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 three-jaw clamp attached to the spindle of a drill press or the shaft of a drill motor to hold a twist drill centered. The jaws of the chuck may be tightened on the drill with a chuck key or Allen wrench, and some chucks are designed to be tightened by hand.
Industry:Aviation
A three-phase alternating current circuit in which one end of each of the three windings of a three-phase generator or transformer is connected to form a common point. In a Y-connected circuit, two windings are in series with each other, and the current flowing in each of the two windings is 120 electrical degrees out of phase with the current flowing in the other windings.
The voltage across the ends of the two windings is 1.73 times the voltage across either of the windings and the common point. A Y-connected circuit is sometimes called a wye-connected circuit or a star-connected circuit.
Industry:Aviation
A three-piece threaded pipe fitting used to join two pipes or to connect a pipe to a component. A union allows the pipes to be connected without either of the pipes having to be turned.
Industry:Aviation
A three-terminal semiconductor device. A pulse of energy on one terminal controls the flow of electrons between its other two terminals. When a pulse of electrical energy of the correct polarity is applied between the emitter and one of the bases, a negative resistance is produced between the two bases, and electrons flow through the UJT between the two bases.
Industry:Aviation
A thrust augmentation system similar to an afterburner in which fuel is added to the fan discharge air and burned.
Industry:Aviation
A thrust reverser that fits in the exhaust system of a turbojet engine.
In normal operation, the clamshell doors form a part of the tail pipe, but when the reverser is deployed, the doors move into position to block the normal tail pipe and duct the exhaust gases around so they flow forward to oppose the forward movement of the aircraft.
Industry:Aviation
A tie point in an aircraft electrical system to which the battery is connected. Electrical loads connected to the battery bus get their power from the bus.
Industry:Aviation
A tight fit between mating parts of a mechanism in which one part fits inside another. In a drive fit, the hole is smaller than the part that fits into it, and force must be used to assemble the parts. A drive fit is also called an interference fit.
Industry:Aviation
A time of controlled operation of a new or freshly overhauled aircraft engine that allows the moving parts to wear together. The operating conditions of pressures, temperatures, and vibration are carefully monitored during the run-in. After the run-in is completed, the lubricating oil is drained and examined for the presence of metallic particles.
Industry:Aviation
A time period specified by the manufacturer of an aircraft engine as the maximum length of time the engine should be run between overhauls without normal wear causing parts of the engine to be worn beyond safe limits. TBO depends upon the engine being operated properly and maintained in accordance with the engine manufacturer’s recommendations.
The overhaul of an engine when it reaches its TBO hours is not mandatory except for certain commercial operators that have this requirement written into their operations manual.
Industry:Aviation
