- 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 static in radio reception caused by atmospheric electrical phenomena such as electrical storms.
Industry:Aviation
A form of steerable lighter-than-air aircraft that uses the pressure of the gas to maintain the shape of the envelope. A blimp is an example of a nonrigid airship.
Industry:Aviation
A form of storage battery in which nickel hydroxide is the active element in the positive plates, and cadmium hydroxide is the active element in the negative plates. The electrolyte is potassium hydroxide and water.
The cells of a nickel-cadmium battery have a closed-circuit voltage of approximately 1.25 volts, and they maintain this voltage until they are almost completely discharged. Nickel-cadmium batteries have a low internal resistance and are ideally suited for such high-current applications as starting gas turbine engines.
Industry:Aviation
A form of stressed skin construction in which the stresses are carried in a portion of the structure made up of strips of metal or wood that cross to form a diamond-shaped lattice. Geodetic structure was used for aircraft construction in the past, but has been replaced to a great extent by monocoque structure, which is similar to geodetic except it uses solid sheets of thin metal, rather than the lattice structure.
Industry:Aviation
A form of stressed skin structure used in the construction of aircraft. Most of the strength of a semimonocoque structure is in the skin, but the skin is supported on a substructure of formers and stringers that gives the skin its shape and increases its rigidity.
Industry:Aviation
A form of structural material made by passing metal heated to its plastic state through specially shaped dies. The extruding process is used to make long, continuous lengths of such structural shapes as angles and channels.
Industry:Aviation
A form of structure with curving sides and a wedge-shaped keystone at the top. An arch supports weight by transmitting the force caused by its weight through its curving sides into the structure supporting it. The forces supported by the arch are transmitted into the sides through the keystone.
Industry:Aviation
A form of tackle used in a shop to lift heavy weights. A chain hoist uses an endless loop of chain to rotate the drive gear in a planetary gear system. The chain that supports and lifts the load is pulled up by the driven gear in the planetary system.
A chain hoist is sometimes called a chain block or a chain fall.
Industry:Aviation
A form of tetrode (four-element) electron tube that uses two beam-forming electrodes, or plates, to shape the flow of electrons so they travel from the cathode to the plate in definite beams.
The screen grid is wound in such a way that its wires are in the shadow cast by the control grid, and keeping the screen grid out of the path of the electrons helps minimize screen current.
Beam power tubes are power amplifier tubes, rather than voltage amplifiers.
Industry:Aviation
A form of thin, spring-steel lock washer. The inside of the washer fits around the bolt or screw, and the outside is notched to form teeth, each of which is twisted.
When the nut is screwed down tight against the washer, the twisted teeth flatten out, and their spring action holds the nut tight against the threads of the screw and prevents its backing off.
An external-tooth lock washer is also called a Type-B shakeproof lock washer.
Industry:Aviation
