- 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 type of electrical switch in which connections are made by sliding a conductor over fixed contacts.
Industry:Aviation
A type of electrical switch whose contacts are mounted on a spring and held pressed together by the operating handle. As soon as the handle is moved to the OPEN position, the spring snaps the contacts apart.
Snap-action switches are used in circuits carrying inductive loads to separate the contacts quickly before the inductance causes an arc to form across the contacts.
Industry:Aviation
A type of electrical switch with six terminals. It can be used to select any one of three conditions in two separate circuits.
Industry:Aviation
A type of electrical temperature-measuring instrument that uses a resistance bulb as its temperature-sensing element. The resistance bulb contains a length of small diameter nickel wire, wound on a mica form and enclosed in a thin stainless steel tube. The resistance of the nickel wire increases as its temperature increases.
The resistance bulb is installed in a Wheatstone bridge circuit in such a way that current flowing through the indicating instrument changes as the resistance of the bulb changes.
Industry:Aviation
A type of electrical transformer encased in a steel shell. The shell completely surrounds the winding and keeps magnetic lines of flux from radiating out from the transformer.
Industry:Aviation
A type of electrical transformer in which the two windings, the primary and the secondary, are wound side-by-side. Bifiliar winding increases the coefficient of coupling between the windings.
Industry:Aviation
A type of electrical transformer whose core permeability is varied to control the current flowing in its secondary winding. A control winding carrying direct current is wound over the transformer core. When no current flows through the control winding, the permeability of the core is high, and the transformer has enough inductive reactance to decrease the secondary current.
When maximum current flows in the control winding, its magnetic field saturates the core with a steady magnetic flux. This flux decreases the permeability of the core so much that the changing flux caused by the secondary current does not affect the core. There is less inductive reactance, so the secondary current has less opposition, and it increases.
Industry:Aviation
A type of electrical transformer with more turns in the primary winding than in the secondary. The secondary voltage of a step-down transformer is lower than the primary voltage, but the secondary current is greater than the primary current.
Industry:Aviation
A type of electrical transformer with more turns in the secondary winding than in the primary. The secondary voltage of a step-up transformer is higher than the primary voltage, but the secondary current is less than the primary current.
Industry:Aviation
A type of electrolytic capacitor that uses tantalum foil for the plates. An oxide film formed on the anode, the positive plate, serves as the dielectric. Absorbent paper saturated with an electrolyte keeps the plates separated. The large capacity of a tantalum-foil capacitor is caused by the thinness of the oxide-film dielectric.
Industry:Aviation
