- 産業: Aviation
- Number of terms: 16387
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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 ...
An opposition to the flow of alternating current or changing direct current, caused by inductance in the circuit. Inductive reactance, whose abbreviation is XL, is measured in ohms, and it decreases the amount of current flowing in a circuit. Resistance is also measured in ohms, and it too decreases the current, but resistance uses power and produces heat, while inductive reactance does not.
Inductive reactance is caused by the generation of an induced voltage whose polarity is opposite to that of the voltage causing it. The induced voltage opposes some of the applied voltage, and because there is less voltage available to force current through the circuit, less current flows. Inductive reactance increases as both the frequency of the alternating current and the inductance of the circuit increase. The formula for inductive reactance is:
: XL = 2π f L
: XL = Inductive reactance in ohms
: 2π = A constant, 6.28
: f = Frequency in hertz
: L = Circuit inductance in henries.
Industry:Aviation
0.637 time the peak value of the sine wave alternating current.
Industry:Aviation
A 2,000-foot-wide zone, located equidistant between parallel runway final approach courses in which flight is not allowed.
Industry:Aviation
A 5 1/4-inch-diameter floppy diskette, used as a mass storage device with a microcomputer. Microcomputers use 8-inch, 5 1/4-inch, and 3 1/2-inch diskettes. The 8-inch diskette is called a floppy diskette, the 5 1/4-inch diskette is called a minifloppy, and the 3 1/2-inch diskette is called a microfloppy.
Industry:Aviation
A ballistic missile with a range of between 200 and 1,500 miles.
Industry:Aviation
A bar of semifinished steel. A billet is rolled from an ingot, and it generally has a square cross section.
Industry:Aviation
A bar, having an accurately ground radius on its edge, used with a sheet-metal brake. The metal bent in the brake is formed around the radius bar to give the bend the correct radius.
Industry:Aviation
A bar, or a piece of metal, wood, or plastic, used to check another piece of material or surface for straightness, or used to draw straight lines. A straightedge is similar to a ruler, except a straightedge does not have graduations marked on it.
Industry:Aviation
