- 업종: 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 point within an electrical system from which the individual circuits get their power.
Industry:Aviation
A point within an object that is the same distance from all points on the surface of the object.
Industry:Aviation
A pointed device mounted in the tailstock of a lathe. The dead center is used to support the work being turned. The dead center does not turn with the work.
Industry:Aviation
A pointed rotary cutting tool rotated under pressure in a drill press or with a hand-held drill motor to cut a hole in a piece of solid material. A drill is correctly called a twist drill.
Industry:Aviation
A pointed weight with a string attached to a hole in line with its point. When the string is fastened to an object, the point of the plumb bob is directly below the point of attachment, and a freely hanging plumb bob always points directly toward the center of the earth. Anything that aligns with the string attached to the plumb bob is said to be plumb.
Industry:Aviation
A poisonous liquid alcohol, formed by the distillation of wood pulp. Methanol is used as a fuel, a solvent, and an antifreeze agent.
Industry:Aviation
A polished surface used to reflect light. When light strikes a reflector it changes its direction. The angle of reflectance at which the light leaves the surface is exactly the same as the angle at which it arrived at the surface, the angle of incidence. By using the proper shape reflector, the light can be formed into a beam.
Industry:Aviation
A popular electronic oscillator circuit which uses a tapped coil in parallel with a capacitor to determine the frequency of the AC the circuit produces. Energy from the collector of a transistor, or the plate of a vacuum tube, passes through one half of the coil and induces a voltage in the other half.
This induced voltage is applied to the base of the transistor, or the grid of the vacuum tube, with a polarity that causes the circuit to oscillate, or produce alternating current.
Industry:Aviation
A popular form of storage battery used in automobiles and airplanes. The positive plate of a fully charged lead-acid battery is made of lead peroxide, and the negative plate is pure lead. The electrolyte is a solution of sulfuric acid and water. When a lead-acid battery discharges, both plates change into lead sulfate, and some of the acid in the electrolyte changes into water.
Passing electrical current through a lead-acid battery from its negative terminal to its positive terminal reverses the chemical action which took place as the battery discharged, and the battery becomes charged again. In the charging process, sulfate ions are driven from the plates back into the electrolyte.
Industry:Aviation
