- 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 fluid control valve that uses a long tapered needle to control the amount of fluid that can flow through an orifice. The needle valve can be moved into or out of the orifice. When the needle is completely in the orifice, the fluid flow is minimum, and when it is completely out of the orifice, the flow is limited by the size of the orifice. When the needle is neither fully in nor fully out, its position controls the effective size of the orifice and thus the amount of fluid allowed to flow.
“Negative” (air traffic control). A term used by ATC to mean “no,” or “permission not granted,” or “that is not correct.”
Industry:Aviation
A fluid line coupling that automatically seals the line when it is disconnected. Hydraulic pumps are normally connected into the hydraulic system with quick-disconnect couplings. This allows the pump to be removed for maintenance without air getting into the system. External hydraulic power sources can be connected into the system through quick-disconnect couplings.
Industry:Aviation
A fluid power system in which the selector valves are arranged in series with each other. Fluid flows from the pump through the center of all of the selector valves, back into the reservoir when no unit is being actuated.
Industry:Aviation
A fluid power system that transmits power or force through an incompressible fluid, such as oil. A complete hydraulic system contains a reservoir to hold the fluid, a pump to move the fluid, valves to control the flow of fluid, and actuators to produce the mechanical force. All of the components are connected together with either rigid or flexible fluid lines.
Industry:Aviation
A fluid power valve that controls the direction or amount of fluid flow. Most fluid power systems use both flow-control and pressure-control valves. Check valves and selector valves are examples of flow-control valves.
Industry:Aviation
A fluid that is heated and sprayed onto an aircraft being prepared for takeoff in conditions of freezing temperature and snow.
Most deicing fluids contain a form of glycol, with thickeners added to hold the glycol to the surface. These fluids remove the ice and then stick to the surface and prevent the formation of more ice.
Industry:Aviation
A fluid to which energy can be added by compressing, or squeezing it into a smaller volume. Gases are compressible fluids.
Industry:Aviation
A fluid used to remove heat from a component or a system. A mixture of ethylene glycol and water is normally used as a coolant in liquid-cooled aircraft engines.
Industry:Aviation
A fluid, often an emulsion of oil and water, poured over a metal while it is being drilled or turned on a lathe.
Cutting fluid carries away some of the heat caused by friction, lubricates the surface being cut, prevents rust, and flushes chips away from the cutting edge of the tool.
Industry:Aviation
A fluid, usually made of some form of alcohol and glycerine, that is sprayed on an aircraft to keep ice from forming on the surfaces. Anti-icing fluid is also carried in the aircraft and is sprayed over the windshield, along the propeller blades, and into the carburetor throat in flight.
Industry:Aviation
