- 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 type of coupling used to join a series of axial-flow compressor disks or axial turbine wheels to each other.
The coupler consists of a series of radial, gear-like teeth on the faces of two mating flanges. Curvic couplings provide a positive engagement with no slippage.
Industry:Aviation
A type of cowling used to cover an aircraft radial engine. A ring cowl surrounds the cylinder heads and decreases the aerodynamic drag caused by the cylinders and improves the flow of cooling air through the cylinder fins. Ring cowls are also called speed rings, or more properly, Townend rings, after their inventor, English physicist H.L. Townend.
Industry:Aviation
A type of cutting tool used to cut sheet metal, paper, or cloth. Shears are similar to scissors, except that they are usually larger and more powerful. Power shears, used to cut thick sheets of metal, are driven by an electric motor.
Industry:Aviation
A type of damage in which chips are broken from the surface of a case-hardened material such as a bearing race. Spalling takes place when a bearing race is put under a load great enough to distort the softer inner part of the metal and cause the hard, brittle surface to crack. Once a crack forms in the surface, chips break out.
Industry:Aviation
A type of damage in which the midspan shrouds on the fan blades overlap, shingle fashion, rather than touching with face-to-face contact. Fan blade shingling is caused by a sudden stoppage of the fan, or by an overspeed condition.
Industry:Aviation
A type of decay found in seasoned wood. Dry rot is caused by fungi in the wood which change the normal fibers into a soft material that becomes a powder. Wood with dry rot has no structural strength.
Industry:Aviation
A type of deflecting-beam torque wrench that uses a dial indicator to measure the amount the beam deflects. The dial of the indicator is graduated in foot-pounds, inch-pounds, or meter-kilograms of torque, rather than units of beam deflection.
Industry:Aviation
A type of directional antenna, used with radio direction finding equipment to determine the direction to the station transmitting the signal the loop is receiving. Loop antennas must be used with a sense antenna to show the side of the loop on which the transmitting antenna is located.
Industry:Aviation
A type of directional radio beacon used to mark a specific location along an airway or along an instrument approach course. A Z-marker transmits a vertical signal on a 75-megahertz carrier modulated with a series of 3,000 hertz dots. The series of dots can be heard over the radio speaker, and the Z-marker also causes the white light on the marker beacon panel to light up in a series of short flashes, the dots.
Industry:Aviation
A type of directional radio transmitting antenna made of two vertical conductors from which electromagnetic energy radiates. These conductors are connected in such a way that the signals radiated from them are opposite in phase.
An Adcock antenna radiates its signal in a field shaped much like a figure eight.
Industry:Aviation
