- Отрасли: 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 stack of metal bellows used as a reference for measuring atmospheric pressure. These bellows, made of circularly corrugated bronze disks, have nearly all the air pumped out of them.
The pressure of the atmosphere compresses the bellows against their inherent spring action, and changes in atmospheric pressure can be measured by measuring the changes in the thickness of the bellows stack.
Industry:Aviation
A stage of compressor blades installed ahead of the front of an axial compressor.
Industry:Aviation
A standard production item. An off-the-shelf computer program, for example, is a standard program that can be bought and used, rather than having a custom program written.
Industry:Aviation
A standardized code of dots and dashes used to transmit information over wires or by radio, using continuous wave (CW) or modulated continuous wave (MCW) radio-frequency energy. The various letters and numbers are made up of combinations of long and short pulses of energy. The long pulses are called dashes, and the short pulses are called dots.
Industry:Aviation
A standardized procedure which permits an air traffic controller to enter the airspace assigned to another air traffic controller without verbal coordination. The procedures are defined in a facility directive which ensures standard separation between aircraft.
Industry:Aviation
A standing wave or lee wave on the lee, or downwind, side of a mountain barrier.
Industry:Aviation
A starter for a large aircraft reciprocating engine that uses a hand crank to store energy in a spinning flywheel. The crank drives the flywheel through a high-ratio gear system to spin it at a high speed and store a great deal of kinetic energy. When the flywheel is spinning, the hand crank is removed and the flywheel is coupled, through a slip clutch, to the engine crankshaft. There is enough energy in the spinning flywheel to turn the engine fast enough for it to start.
Many electric-inertia starters have provisions for spinning the flywheel with a hand crank when there is no electrical power available for starting.
Industry:Aviation
A stated value that may be different from an actual value. For example, an electrical resistor may have a nominal resistance of 1,000 ohms, with a tolerance of plus or minus ten percent. Its nominal value is 1,000 ohms, but its actual value may be anywhere between 900 and 1,100 ohms.
Industry:Aviation
A statement indicating that an aircraft’s fuel supply has reached a state where, upon reaching the destination, it can accept little or no delay. This is not an emergency situation, but merely indicates that an emergency situation is possible should any undue delay occur.
Industry:Aviation
