- 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 ...
A horizontal stabilizer that can be adjusted in flight to trim the airplane, so it will fly hands-off at any given airspeed.
Industry:Aviation
A hot section malfunction in which the flame penetrates through the entire turbine system and into the tail pipe.
Industry:Aviation
A hot, dry, foehn wind, generally from the northeast or east, occurring west of the Sierra Nevada Mountains, especially in the pass and river valley near Santa Ana, California.
Industry:Aviation
A hot-cathode, gas-filled electron tube in which one or more control electrodes start a flow of electrons between the cathode and anode. A pulse of high voltage on the control grid ionizes the gas inside the tube and allows electrons to flow.
The grid loses its control as soon as the electrons begin to flow, and the only way to stop the flow is to reduce the anode voltage to a value that no longer attracts the electrons.
Industry:Aviation
A housing made of a conductive material such as copper or aluminum that encloses an electrical circuit. The shield picks up stray electrical energy radiated from the circuit and carries it to ground so it cannot interfere with any other electrical or electronic equipment.
The ignition systems used on almost all aircraft reciprocating engines are electrically shielded by enclosing the entire system in a conductive covering that is electrically grounded to the engine.
Industry:Aviation
A hydraulic actuator that converts fluid pressure into rotary motion. Hydraulic motors have an advantage in aircraft installations over electric motors, because they can operate in a stalled condition without the danger of a fire. Hydraulic motors may be of the gear, piston, or vane type.
Industry:Aviation
A hydraulic device in the valve train of certain aircraft reciprocating engines. When the cam follower is on top of a cam lobe, the intake or exhaust valve is held open by a cushion of oil inside the valve lifter. A specific amount of this oil leaks out while the valve is open, and when the valve closes, a spring pushes the piston up and oil is pulled into the lifter to replace that which was lost.
The continual leakage and replenishment of the oil in the hydraulic valve lifter keeps all clearance out of the valve operating system.
Industry:Aviation
A hydraulic jack placed under the landing gear shock absorber while it is being filled with oil. The jack moves the piston in and out of the shock absorber cylinder while it is being filled, to work all the air out of the oil.
Industry:Aviation
A hydraulic system in which the selector valves are installed in parallel with each other. When no unit is being actuated, fluid circulates from the pump back to the reservoir without flowing through any of the selector valves.
Industry:Aviation
A hydraulically operated clamp that holds the brake linings on either side of a brake disk. When the brakes are applied, the calipers squeeze the linings tight against the disk to produce the required friction.
Industry:Aviation
