- 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 shallow, concave, circular reflector used with a radio antenna, actually with the shape of a parabola.
Signals from a transmitter are received in the dish and are reflected in such a way that they concentrate at a point from which they are picked up and carried into the receiver. Signals picked up by a dish are highly directional.
Industry:Aviation
A shape that is neither square nor round, but can be either an elongated (stretched) square or circle. An oblong circle is called an ellipse, and an oblong square is called a rectangle.
Industry:Aviation
A sharp and irregular edge on a piece of metal, wood, or plastic material.
Industry:Aviation
A sharp burr that forms on the edge of a sheet of metal when it is cut with a dull shear.
Industry:Aviation
A sharp, rough edge of a piece of metal left when the metal is sheared, punched, or drilled.
Industry:Aviation
A sharp, uncontrolled change in direction of an airplane on the ground. Tail wheel-type airplanes are highly subject to ground looping because their center of gravity is behind the point at which the main wheels contact the ground.
Industry:Aviation
A sharp-pointed center that fits into the headstock of a lathe and turns with it. The material to be turned is mounted between the live center and the dead center and is turned by a lathe dog that clamps the material and turns with the faceplate.
Industry:Aviation
A sharp-pointed punch used to mark a location when laying out metal parts. A prick punch makes only a small mark on the surface of the metal, just large enough to accurately position a center punch.
Industry:Aviation
A sharp-pointed spike in the inlet air duct of a supersonic aircraft. This spike forms an oblique, or angled, shock wave inside the inlet duct as it passes through the air. Air entering the first-stage compressor of a gas turbine engine must flow at a speed below the speed of sound, and when the airplane is flying faster than sound, the air must be slowed before it enters the compressor.
When air passes through the oblique shock wave, it slows down, but is still moving faster than the speed of sound. Just inside the inlet duct, a second shock wave, this time a normal shock wave, is produced. This normal shock wave is at right angles to the airflow, and air passing through it is slowed to a speed below the speed of sound.
Industry:Aviation
