- 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 switch in a piece of airborne electronic equipment actuated by an abnormal acceleration.
Emergency Locator Transmitters (ELTs) have an acceleration switch that causes them to begin transmitting if the aircraft crashes and subjects the ELT to an abnormally high longitudinal acceleration.
Acceleration switches are also called inertia switches.
Industry:Aviation
A switch inside a piece of electrical equipment that opens the circuit when a certain operating condition is reached.
Industry:Aviation
A switch mounted on the shock strut of an aircraft landing gear. The squat switch is in a circuit whose actuation depends upon the configuration of the landing gear. For example, the squat switch prevents the landing gear retraction handle being moved any time weight is on the landing gear. A squat switch can also be installed in the cabin pressurization system to prevent the cabin being pressurized if the airplane is on the ground and weight is on the landing gear.
“Squawk” (air traffic control). A term used by ATC to request a pilot to activate specific modes, codes, or functions on the aircraft transponder. For example, “squawk three/alpha, two one zero five, low.”
“Squawk ident” (air traffic control). A phrase used by ATC to request a pilot to activate the ident feature on the aircraft transponder. Activation of the ident feature allows the ground controller to immediately identify the aircraft that is squawking.
Industry:Aviation
A switch on the collective control of a turbine engine-powered helicopter. The beep button is used to adjust the steady-state RPM of the engine.
Industry:Aviation
A switch used to turn an electrical device on or off when a specified fluid pressure is reached. Some hydraulic systems have a pressure switch that senses the hydraulic system pressure. When the pressure drops to a low value, called the cut-in pressure, the switch closes and turns the hydraulic pump on. When the pump brings the pressure up to a higher value, called the cut-out pressure, the pressure switch turns the pump off.
Industry:Aviation
A switch whose contacts are actuated by changing temperature. The contacts are normally mounted on a bimetallic strip that warps when its temperature changes. When the strip warps, the contacts either snap closed or snap open, depending on whether the switch is actuated by a descending or a rising temperature.
Industry:Aviation
A symbol representing the rotational speed of the high-pressure compressor in a dual-spool gas turbine engine. In common usage, the high-pressure compressor is often called the N2 compressor.
Industry:Aviation
A symbol representing the rotational speed of the high-pressure compressor in a triple-spool gas turbine engine.
Industry:Aviation
A symbol representing the rotational speed of the low-pressure compressor in a dual-spool gas turbine engine. In common usage, the low-pressure compressor is often called the N1 compressor.
Industry:Aviation
A synthetic cleaning material. A detergent is similar to soap in its ability to emulsify oil and hold dirt and other solid or semi-solid contaminants. Unlike soap, a detergent is composed of man-made chemicals, rather than organic matter such as animal or vegetable fat.
Industry:Aviation
