- 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 pressure wave formed in the air as an object, such as a flight vehicle, passes through the air at a speed greater than the speed at which sound can travel. As the vehicle moves through the air, it creates disturbances, and sound waves spread out in all directions from the disturbance. Since the vehicle is flying faster than the sound waves are moving, they build up and form a shock wave at the front and the rear of the vehicle.
As air passes through a shock wave, it slows down and its static pressure increases. The energy in the air is decreased.
Industry:Aviation
A pressure-control valve that relieves any pressure over the amount for which it is set.
Pressure relief valves are used in both hydraulic and pneumatic systems to prevent damaging high pressures that could be caused by a malfunctioning pressure regulator, or by thermal expansion of fluid trapped in portions of the system.
Industry:Aviation
A pressure-operated valve in the bottom of the internal supercharger section of a reciprocating engine that is open when the pressures inside and outside the supercharger housing are the same. Excess fuel can drain from the engine through this valve if the engine is flooded during the starting procedure.
Industry:Aviation
A primary FAA publication whose purpose is to instruct airmen about operating in the National Airspace System of the U.S. The AIM provides basic flight information, ATC procedures, and general instructional information concerning health, medical facts, factors affecting flight safety, accident and hazard reporting, and types of aeronautical charts and their use.
Industry:Aviation
A primary flight control surface mounted on the trailing edge of an airplane wing, near the tip. Ailerons operate by lateral movement of the control wheel or stick, and their displacement causes the airplane to rotate about its longitudinal axis.
Industry:Aviation
A primer which prevents, or at least slows, the formation of corrosion in the metal it covers.
Industry:Aviation
A principal cloud type, gray colored and often dark. The appearance of nimbostratus clouds is often diffused by more or less continuously falling rain or snow, which in most cases reaches the ground. Nimbostratus clouds are normally thick enough to blot out the sun.
Industry:Aviation
A principle of physics which states that under equal pressure and temperature, equal volumes of all gases contain equal numbers of molecules.
Industry:Aviation
A printed circuit board used in modern electronic equipment to supply power and to carry electrical signals to other printed circuit boards that are plugged into it.
Industry:Aviation
A prismatically colored or whitish circle or arc of a circle, with the sun or moon at its center. Coloration of a halo changes from red inside to blue outside, which is opposite to the coloration of a corona. See corona.
A halo is fixed in size and has an angular diameter of 22° (common) or 46° (rare). Halos are characteristic of clouds composed of ice crystals and are useful in telling the difference between cirriform (ice) clouds and lower clouds, which are composed of liquid water.
Industry:Aviation
