- 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 ...
An orifice, or hole, in a container that maintains the air pressure inside the container the same as the pressure on the outside.
Industry:Aviation
An orthographic drawing showing three views of a part. There are six possible views, but the three most commonly used for aircraft drawings are the front, right-side, and top views.
Industry:Aviation
An oscillating, or alternating, signal sent into the servo motors of an automatic pilot. The dither signal does not produce rotation of the motor when there is no directional signal. But, as soon as the directional signal is sent to the motor, the dither signal adds to it and helps overcome the effect of friction or hysteresis.
Industry:Aviation
An oscillator inside a communications radio receiver that produces radio-frequency alternating current. The frequency produced by the VFO can be changed until it is almost the same as the radio frequency of the carrier being received. When the output of the VFO is mixed with a continuous wave (CW) carrier, an audible signal is produced.
VFOs are used to make Morse code signals audible when they are transmitted by continuous wave (CW) transmission. When a VFO is used in this way, it is called a beat-frequency oscillator, a BFO.
Industry:Aviation
An outline pattern made of sheet metal, plastic, or heavy paper that can be traced on the material of which a part is to be made. Much time is saved by using a template rather than having to lay out the outline of the part from the engineering drawing each time a part is to be made.
Industry:Aviation
An out-of-trim condition in which an airplane flies, hands off, with one wing low. A wing-heavy condition is normally corrected by changing the rigging of the wing or by the deflection of one of the trim tabs.
Industry:Aviation
An oxy-gas torch which has a preheating flame to get the metal red-hot before it is cut. When the metal is sufficiently hot, a jet of oxygen is blown through the center of the flame. This oxidizes, or burns, through the metal and produces a smooth cut.
Industry:Aviation
An oxygas welding flame in which more oxygen is supplied to the torch than is needed for a neutral flame. An oxidizing flame is identified by a sharp-pointed inner cone and a hissing noise made by the torch.
Industry:Aviation
An oxygen system installed in an aircraft and used by the flight crew when flying at high altitude. The demand system meters oxygen from the regulator to the mask only when the user inhales, and the flow of oxygen is shut off during exhale.
A demand oxygen system is much more economical of the oxygen supply than a continuous-flow system.
Industry:Aviation
An oxygen system installed in an aircraft in which gaseous oxygen is carried in steel bottles under a pressure of between 1,800 and 2,000 pounds per square inch.
Industry:Aviation
