- 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 ...
The condition of an electrical circuit that exists when all of the circuit values are constant. When some circuits are first energized, voltage or current transients cause conditions that are not normal. The steady-state conditions can be measured only after all of these transient conditions have stabilized.
Industry:Aviation
The condition of balance of an aircraft in which the center of gravity is behind its allowable aft limit.
Industry:Aviation
The condition of engine operation in which an intake or exhaust valve does not seat when the rocker arm is off the valve stem. It is possible for the engine to operate at a speed at which valves are being opened at the natural, or resonant, frequency of the valve springs. If this happens, the valve springs lose their effectiveness and will not close the valves, and the valves will float.
To prevent floating, most aircraft engine valves are closed with more than one spring. These springs are wound with a different pitch and of different size wire, giving them different resonant frequencies.
Industry:Aviation
The condition of supercharging of a reciprocating engine in which a two-speed, single-stage internal supercharger is operating at its high-speed ratio. This ratio is normally about ten times the speed of the crankshaft.
Industry:Aviation
The condition of the atmosphere when the actual water vapor present in the air is the maximum the air can hold at the existing temperature.
Industry:Aviation
The condition of the surface of a reciprocating engine cylinder wall that has been honed to make it hold lubricating oil. Surface roughness is measured in microinches rms (μin rms).
Industry:Aviation
The condition of the vapor above a liquid that will not allow any more of the liquid to evaporate.
Industry:Aviation
The condition that exists when the distribution of winds within a given area is such that there is a net horizontal inflow of air into the area. In convergence at lower levels, the removal of the resulting excess air is accomplished by upward movement.
Clouds and precipitation are likely to occur in areas of low-level convergent winds.
Industry:Aviation
The cone-shaped section of the exhaust system of a gas turbine engine used to produce the correct change in area of the duct through which the exhaust gases leave the engine.
Industry:Aviation
The cone-shaped shock wave produced by a sharp-pointed object moving through the atmosphere at a speed greater than the speed of sound.
Industry:Aviation
