- 行业: 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 form of hand-held optical instrument used to observe distant objects. Binoculars have a set of magnifying lenses for each eye, and prisms are used to get a high degree of magnification in a short physical length.
Industry:Aviation
A form of hardness tester used to determine the hardness of such material such as rubber, metal, or plastic. A metal weight is dropped through a glass tube onto the surface of the material being tested, and the height of the rebound of the weight is measured. The harder the material, the higher the weight will bounce.
Industry:Aviation
A form of heat damage that occurs in a transparent thermoplastic material. Crazing appears as a series of tiny, hairlike cracks in the surface of the plastic. If a material is heated nonuniformly, one side will expand more than the other, and the stresses caused by the uneven expansion produce the crazing.
Crazing destroys the strength of the material and makes it difficult to see through.
Industry:Aviation
A form of heat engine in which the fuel and air mixture is burned inside the engine to heat and expand the air so it can perform work.
Industry:Aviation
A form of heat engine in which the fuel is burned to release its heat energy outside the engine. A steam engine is a form of external combustion engine. Fuel is burned outside the engine to heat water and change it into steam. The steam is then fed into the cylinder or through the turbine of the engine where it expands and performs work.
Industry:Aviation
A form of heat engine that produces thrust by accelerating a relatively small mass of air through a large change in velocity. A compressor in the front of the engine compresses the inlet air, and fuel is sprayed into this air and burned. The heat from the burning fuel expands the air and forces it out the back of the engine in the form of a high-velocity jet of hot air. The air leaving the engine flows through a turbine which extracts energy to drive the compressor.
Industry:Aviation
A form of heat engine that produces thrust by heating a mass of air inside the engine and discharging it at a high velocity through a specially shaped nozzle. The amount of thrust is determined by the mass of the air and by the amount it is accelerated. Reaction engines which include rocket engines are commonly called jet engines.
Industry:Aviation
A form of heat treatment of steel in which the surface absorbs extra carbon and becomes hard and brittle, while the center of the steel remains relatively soft and tough.
The part to be carburized is packed in a material containing a large amount of carbon (finely ground bone is often used) and is heated in a furnace until the correct amount of carbon is absorbed into the surface of the steel.
Industry:Aviation
A form of helical coil spring wound in such a way that it always produces a constant restorative force, regardless of the amount it is displaced.
Industry:Aviation
A form of hexagonal nut (a six-sided nut) that has slots cut across its end. A cotter pin is passed through the slots and through a hole in the shank of the bolt to lock the nut to the bolt. Castellated nuts are often called castle nuts.
Industry:Aviation
