- 업종: 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 special airspeed indicator that modifies the differential pressure measured by its diaphragm to take into consideration free-air temperature and barometric pressure. The indication of the instrument is in units of true airspeed, rather than indicated airspeed.
Industry:Aviation
A special atom of an element having the same number of protons as an ordinary atom, but with more than the normal number of neutrons. An isotope of an element has the same atomic number as a normal atom, but because of the additional neutrons, it has a greater atomic weight.
Industry:Aviation
A special bolt used in aircraft construction in which the shank is ground to a tolerance of +0.000, -0.0005 inch. Close-tolerance bolts are identified by a triangle around the mark on the bolt head that identifies the material of which the bolt is made. The shank of a close-tolerance bolt is not cadmium plated, but it is kept from rusting by a coating of wax or grease.
Industry:Aviation
A special bolt used to attach a clevis to a control horn or bell crank so the clevis is free to move. Clevis bolts have a short threaded section separated from the shank of the bolt by a shallow groove. The head of a clevis bolt is slotted so it can be turned with a screwdriver, but the slot is so shallow very little torque can be applied.
A thin nut is used on a clevis bolt, and this nut should not be tightened enough to keep the clevis from moving freely on the device to which it is connected.
Industry:Aviation
A special bolt with an explosive charge built into it. This is a remotely operated charge that causes the bolt to fail and release its hold. Explosive bolts are used to allow stages of rockets to separate, and to release droppable fuel tanks from an airplane.
Industry:Aviation
A special bushing used between the rear spar of certain cantilever airplane wings and the wing attachment fitting on the fuselage.
The portion of the bushing that fits through the hole in the spar is slightly offset from that which passes through the holes in the fitting. By rotating the bushing, the rear spar may be moved up or down to adjust the root incidence of the wing.
Industry:Aviation
A special check valve used in a hydraulic or pneumatic system, to allow full flow of fluid in one direction but a restricted flow in the opposite direction.
Industry:Aviation
A special circuit breaker mounted inside an electric motor. The thermal cutout opens the power lead to the motor if the motor overheats for any cause. These causes could be: too great a load, too low an operating speed, or lack of cooling airflow. As soon as the motor cools down, the thermal cutout automatically resets itself, and the motor runs again. Thermal cutouts are also called automatic-reset circuit breakers.
Industry:Aviation
A special container used to store liquid oxygen and liquid nitrogen. A Dewar flask has an inner and an outer container, with the space between them evacuated to form a vacuum. This serves as a thermal insulator and minimizes the amount of heat allowed to enter the container. The two surfaces within the evacuated area are silvered to reflect heat away from the container walls.
Industry:Aviation
A special cutting tool used to enlarge the diameter of a hole for a certain depth. A counterbore has a pilot, or guide pin, the size of the hole, and the cutting edges are perpendicular to the axis of the tool.
A counterbore enlarges the hole for a certain depth and produces a smooth, flat bottom to form a seat for a bolt head or nut.
Industry:Aviation
