- 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 type of plastic material that, when once hardened by heat, cannot be softened by being heated again. Phenolic resin is an example of a thermosetting material.
Industry:Aviation
A type of pneumatic altimeter in which the bellows moves an electrical pickup whose signal is amplified enough for it to drive a servo motor. The servo motor moves the drums and pointer in the display.
Industry:Aviation
A type of power-driven pump used to move such fluids as fuel and oil. A gear-type pump is a constant-displacement pump using two meshing spur gears, mounted in a close-fitting housing.
Fluid is taken into the housing where it fills the space between the teeth of the gears, and it is carried around the housing as the gears rotate. On the discharge side of the pump, the gear teeth mesh, and the fluid is forced out of the pump.
Industry:Aviation
A type of precipitation composed of unbranched ice crystals in the form of needles, columns, or plates. Ice crystals normally have a slight downward motion and may fall from a cloudless sky.
Industry:Aviation
A type of precipitation that forms in the air when water vapor changes directly into crystals of ice. Snow forms when the air temperature is below 0°C.
Industry:Aviation
A type of pressure measuring device that produces an electrical signal proportional to the pressure being measured.
Industry:Aviation
A type of primary electrical cell (a cell that cannot be recharged). A mercury cell uses zinc for its anode (positive terminal), mercuric oxide for the cathode (negative terminal), and potassium hydroxide for the electrolyte.
A mercury cell has a longer life than either an alkaline cell or a carbon-zinc cell, and its low internal resistance allows it to hold a constant output voltage until it is almost completely discharged.
Industry:Aviation
A type of primary electrochemical cell that uses powdered zinc as the anode, powdered graphite and manganese dioxide as the cathode, and potassium hydroxide as the electrolyte.
An alkaline cell has an open-circuit voltage of 1.5 volts, and it has from 50% to 100% more capacity than a carbon-zinc cell of comparable size.
Industry:Aviation
A type of primer used in a finishing system to provide a good bond between the surface and the topcoat material. A primer-surfacer has enough body to be sanded smooth to cover minor roughness of the surface being finished.
Industry:Aviation
A type of primer used to prepare an aluminum or magnesium surface to receive a topcoat of finishing material. Wash primer contains an etchant, a material that chemically roughens the metal, to prepare the surface to accept the topcoat material.
Industry:Aviation
