- Industry: 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 resistor whose resistance can be changed by varying the length of the resistance element in the circuit. The most commonly used variable resistors are rheostats and potentiometers. Rheostats have two terminals, one at the end of the resistance element and one at the wiper, or movable contact. Potentiometers have three terminals, one at either end of the resistance element and one at the wiper.
Industry:Aviation
A resonant AC electrical circuit that contains a capacitor and an inductor connected in series. At the resonant frequency of the circuit, the inductive reactance and the capacitive reactance are the same. But they are 180° out of phase, and they cancel each other.
The only opposition to the flow of AC in a series resonant circuit is caused by the circuit resistance.
Industry:Aviation
A resonant electronic circuit composed of a capacitor and an inductor in parallel. Electrical energy is stored in a tank circuit in the form of electromagnetic and electrostatic fields that build up and decay at a frequency determined by the capacitance and the inductance in the circuit.
Industry:Aviation
A resonant electronic circuit containing both inductance and capacitance.
Either the inductance or the capacitance can be adjusted to change the frequency to which the circuit is resonant.
Industry:Aviation
A response to an action that occurs in a direction opposite to the action. The recoil produced when a gun is fired is an example of reaction. When the powder in the cartridge burns, the resulting gas forces the bullet out the barrel. The action forcing the bullet from the barrel causes an opposing reaction that pushes back on the gun with exactly the same amount of force.
Industry:Aviation
A resultant of two forces acting in the same plane, but in opposite directions, toward each other. A compression, or compressive, force tries to mash the ends of an object together.
Industry:Aviation
A retaining ring used to prevent a shaft moving lengthwise out of a hole. A groove is cut around the outside of the shaft, and the spring steel lock ring grips the groove and holds the shaft in place.
A lock ring is made in the shape of an open circle, with tabs at both of its ends so a pair of special lock ring pliers can be used to expand the ring enough for it to slip over the shaft. When the ring is over the groove, the pliers are released, and the spring action of the lock ring holds it tight in the groove. Lock rings are made for both external and internal grooves.
Industry:Aviation
A return trip made by a commercial aircraft in which no cargo or persons are carried for hire.
Industry:Aviation
A reusable metal mold, used for making complex castings. Castings made in permanent molds can be made thinner than those made by sand casting.
Industry:Aviation
A reverse-blocking triode thyristor that can be triggered into conduction in only one direction. The three terminals of an SCR are the anode, the cathode, and the gate.
An SCR blocks electron flow in both directions until a pulse of electrical energy of the proper polarity is applied to the gate. The SCR will then conduct electrons in its forward direction, between its cathode and its anode. A conducting SCR will continue to conduct until the voltage across the anode and cathode is removed or until its polarity is reversed.
Industry:Aviation
