- 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 test to measure the strength of the fabric used to cover an aircraft. A strip of fabric exactly one inch wide is cut from the aircraft and all of the dope removed from it. This strip is put into a tensile tester and pulled until it breaks. The number of pounds of pull required to break the strip is the strength of the fabric in pounds per inch.
Industry:Aviation
A test used to determine whether or not the insulation around certain shielded wires in an ignition system can withstand the high voltage they carry without leaking an excessive amount of current to ground.
A high potential (high voltage) is placed between the center conductor and the metal shield around the outside of the insulation. An indicator light glows if the leakage current between the two conductors is excessive. A high-potential test is often called a high-pot test.
Industry:Aviation
A tester used to determine the amount of force needed to compress a valve spring to a specified height. Weak valve springs do not close the valves tightly enough, and they must be discarded when the engine is overhauled.
Industry:Aviation
A tethered, gas-filled balloon used during wartime to protect an area from low-flying airplanes. An airplane is prevented from making a strafing run in an area protected by barrage balloons by the danger of flying into the tethering cables.
Industry:Aviation
A thermally actuated electrical circuit protection device installed in some electric motors that opens the power circuit when the motor overheats and automatically closes to restore the circuit when the motor cools down.
Automatic-reset circuit breakers are not approved for use in aircraft electrical systems.
Industry:Aviation
A thermocouple combination used to measure temperatures up to about 300°C. Copper forms the positive element, and constantan, the negative.
Industry:Aviation
A thermocouple combination used to measure temperatures up to about 410°C. Iron forms the positive element, and constantan, the negative. Iron-constantan thermocouples are generally used to measure cylinder head temperature on reciprocating engines.
Industry:Aviation
A thermocouple pickup used to measure cylinder head temperature on an air-cooled aircraft engine.
The bayonet probe fits into an adapter screwed into the cylinder head and a spring holds the end of the probe tightly against the cylinder head.
Industry:Aviation
A thermocouple used to measure the temperature of the exhaust gas in either reciprocating or gas turbine engines. It can be used for measuring temperatures up to 1,000°C.
Chromel is the positive lead, and it is normally enclosed in a white insulation for color coding. Alumel is the negative lead, and it is normally enclosed in a green insulation. The alumel lead can also be distinguished from the chromel lead because alumel is magnetic.
Industry:Aviation
A thermocouple-type instrument that shows the temperature of the gas leaving the exhaust valve of a reciprocating engine or in the tail cone of a turbine engine.
EGT of a reciprocating engine is measured by a chromel-alumel thermocouple probe inserted into one or more exhaust pipes near the cylinder. EGT of a turbine engine is measured by averaging the output of a series of chromel-alumel thermocouples connected in parallel and arranged around the tail cone just aft of the last stage of turbine.
Industry:Aviation
