- 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 mark on the dial of a four-minute turn and slip indicator that has the shape of a doghouse.
The inside edge of the doghouse is located one needle width away from the edge of the center reference mark on the dial, so a turn in which the needle aligns with the doghouse, a two-needle-width turn, is a standard rate, three degrees per second, turn. A one-needle-width turn on a turn and slip indicator which has doghouses on the dial is a four minute, or 1 1/2-degree-per-second turn.
Industry:Aviation
A marker beacon that defines a point along the glide slope of an instrument landing system (ILS), normally located at or near the point of decision height (ILS Category I). The middle marker is keyed to transmit alternate dots and dashes keyed at the rate of 95 dot-dash combinations per minute, with a 1,300-Hz tone which is received aurally and visually by compatible airborne equipment.
Industry:Aviation
A marker beacon used with an ILS Category II precision approach. It is located between the middle marker and the end of the ILS runway.
Inner markers transmit a radiation pattern keyed with six dots per second and indicate both aurally and visually that, if the aircraft is on the glide path, it is at the designated decision height (DH) — normally 100 feet above the touchdown zone elevation on the CAT II approach.
Industry:Aviation
A mass of air whose temperature lapse rate, the change in temperature as the altitude changes, is greater than that of the air surrounding it. When unstable air is forced upward by flowing up the side of a mountain, for example, it will continue to move upward, increasing its speed as it goes up. This causes updrafts in the air. Cumulus clouds form at the top of a column of rising unstable air.
Industry:Aviation
A massless particle of an electromagnetic field. A photon, which is also called a quantum of light, has both energy and momentum.
Industry:Aviation
A mat of fine threads of steel. Steel wool is used as an abrasive to remove rust or to clean a surface.
Industry:Aviation
A material containing minute particles of a hard substance used to wear away a softer surface. Aluminum oxide, silicon carbide, and glass beads are abrasives commonly used in aircraft maintenance.
Industry:Aviation
A material ground into a fine powder and dispersed evenly through the vehicle of a finishing material such as paint or enamel. Pigment gives the finishing material its color.
Industry:Aviation
A material mixed into a plastic resin to give body to the resin. Powdered chalk and microballoons are two commonly used filler materials.
Industry:Aviation
A material obtained from natural fibrous plants such as cotton and kapok. Cellulose is treated with certain acids to make the base for some plastic materials.
Industry:Aviation
