- 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 saw that uses a very narrow blade moved back and forth across the work being cut. A jigsaw is used to cut small-radius curves in wood, metal, or plastic.
Industry:Aviation
A type of screw with sharp threads that cut their own matching threads when screwed into soft metal, wood, or plastic. Self-tapping screws are especially suited for holding together sheets of thin metal, and for this reason, they are often called sheet-metal screws, or PK screws, after Parker-Kalon, one of their major manufacturers.
Industry:Aviation
A type of seal used in an engine to prevent oil leaking from the engine around a rotating shaft.
Industry:Aviation
A type of seal used in fluid-power system components. An O-ring is a ring-shaped seal with a round cross section, made of a resilient material. An O-ring fits into a groove to form a seal between two parts.
O-rings are two-way seals; they seal in either direction. They can be used as either packings between moving parts or gaskets between parts having no relative motion.
Industry:Aviation
A type of seat installed in a military aircraft that may be shot out of the aircraft with a powder charge in the event of an inflight emergency.
Industry:Aviation
A type of secondary control on an airplane, a control which does not rotate the aircraft about any of its three axes. Speed brakes produce drag without affecting lift, or causing the aircraft to pitch. The drag they produce allows a highly streamlined airplane to descend at a steep angle without picking up excessive speed.
Industry:Aviation
A type of secondary ignition system for a gas turbine engine. This system is used during takeoff and landing, as well as in flight when weather conditions are such that could cause an engine to flame out. The continuous-duty system keeps one igniter plug firing.
Industry:Aviation
A type of selector valve that functions as an unloading valve as well as a selector valve. All open-center selector valves are installed in series, and when no unit is being actuated, fluid from the pump flows through the centers of all of the valves and returns to the reservoir.
When a unit is selected for actuation, the center of the selector valve is shut off and the fluid from the pump goes through the selector valve into one side of the actuator. Fluid from the other side of the actuator returns to the valve and goes back to the reservoir through the other selector valves. When the actuation is completed, the selector valve is placed in its neutral position. Its center opens, and fluid from the pump flows straight through the valve, unloading the pump.
Industry:Aviation
A type of self-locking nut used on a bolt that is subject to vibration — it cannot, however, be used on a bolt that is subject to rotation. A collar of resilient, or springy, fiber is locked into the end of the threads in the nut. The hole in the fiber is slightly smaller than the major diameter of the threads on the bolt on which it fits.
When the nut is screwed onto the bolt, the threads press, but do not cut, into the fiber and cause so much friction that the nut cannot vibrate loose from the bolt. A fiber locknut can be reused as long as a wrench is needed to turn it onto the bolt.
Industry:Aviation
A type of self-lubricating bushing. Oilite bushings are made of a porous bronze material impregnated with oil. They can be pressed into holes to decrease the resistance to shafts turning in the holes. When a shaft turns in an oilite bushing, it produces heat that brings the oil to the surface and provides lubrication between the bushing and the shaft.
Oilite bushings must never be washed, as washing removes the oil.
Industry:Aviation
