- 行业: 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 chamber in the lubrication system of a gas turbine engine in which the return oil from the engine collects before it is returned to the reservoir. Any air in the oil is allowed to escape while the oil is in this chamber.
Industry:Aviation
A change in the characteristics of a material that takes place over a period of time under specified environmental conditions. Aging may cause the physical condition of the material either to improve or to deteriorate.
Certain aluminum alloys do not have their full strength when they are first removed from the quench bath after they have been heat-treated, but they gain this strength after a few days by the natural process of aging.
Industry:Aviation
A change in the chemical nature (the chemical characteristics) of elements when they unite to form a chemical compound. Hydrogen is a lighter-than-air gas, and oxygen is also a gas. But when two atoms of hydrogen unite with one atom of oxygen, one molecule of water (H2O), a liquid, is formed.
The compound water has different chemical characteristics from those of either of the elements oxygen or hydrogen.
When hydrogen and oxygen combine to form water, a chemical reaction takes place.
Industry:Aviation
A change in value per unit of a second parameter. Such terms as pressure gradient (inches of mercury per thousand feet) and temperature gradient (degrees Celsius per thousand feet) are commonly used in meteorology.
Industry:Aviation
A change to a certificated aircraft, aircraft engine, propeller, or appliance.
Industry:Aviation
A characteristic of a gyroscope that causes it to react to an applied force as though the force were applied at a point 90° in the direction of rotation, from the actual point of application.
Precession is the characteristic used in rate gyros. A rate gyro will precess, or lay over in its gimbal, an amount proportional to the rate at which the gimbal is rotated. Rate gyros are the heart of turn and slip indicators and turn coordinators. The rotor of a helicopter acts in much the same way as a gyroscope and is affected by gyroscopic precession.
Industry:Aviation
A characteristic of all matter that causes an object to try to remain in its present condition. If the object is at rest, not moving, its inertia tries to keep it at rest. But if it is moving, its inertia tries to keep it moving — in the same direction, and at the same speed.
Industry:Aviation
A characteristic of certain radio signals that causes them to act in the same way as light. These signals travel in straight lines and cannot bend around obstructions. Very-high-frequency (VHF) and ultra-high-frequency (UHF) communications are line-of-sight transmissions which require a clear path between the transmitting and receiving antennas. The reception distance of VHF and UHF signals is dependent upon the altitude of the aircraft above the transmitting antenna.
Industry:Aviation
A chart of the steps taken in the execution of a program by a computer. Symbols are used in the flowchart to show the beginning and the end of the program, data input and output points, and decision points.
Industry:Aviation
