- 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 hole in a mold through which liquid plastic or molten metal is poured to fill the mold. When the molded material becomes solid, the mold is opened, and the metal which was in the sprue (this metal is also called a sprue) is broken from the casting and discarded.
Industry:Aviation
A hole. When the word orifice is used, the hole is considered to have special characteristics. The orifice in a carburetor jet, for example, has a specific diameter, length, and approach and departure angles.
Industry:Aviation
A hollow exhaust valve that is partially filled with metallic sodium. The sodium is a soft solid at room temperature, but at the operating temperature of the valve, it melts and becomes a liquid that wets the inside surfaces of the hollow valve stem and head. As the valve opens and closes, the sodium sloshes back and forth, picking up heat from the head and carrying it into the stem, where it is transferred through the valve guide into the cylinder head and is subsequently dissipated into the air.
Industry:Aviation
A hollow metal ring mounted around the hub of a propeller so that it turns with it. A mixture of alcohol and ethylene glycol is pumped into the slinger ring, and centrifugal force throws the fluid out through short discharge tubes along the leading edges of the propeller blades. The fluid prevents ice from forming on the blades.
Industry:Aviation
A hollow transmission line through which high-frequency electromagnetic waves are directed.
Industry:Aviation
A homogeneous mixture (a mixture that is the same all the way through) of one or more materials dissolved in another. A solution is a physical mixture, because the parts that make up the solution do not have to be combined in any exact ratio, as they do in a compound. Either a little bit, or a large amount of salt can be dissolved in a container of water, to produce a solution of salt water.
Industry:Aviation
A hooded opening used to direct outside air into an aircraft structure in flight. The ram effect caused by movement of the aircraft through the air increases the amount of air taken into the structure.
Industry:Aviation
A horizontal control surface mounted ahead of the main wing to provide longitudinal stability and control.
Industry:Aviation
A horizontal plane is one that is perpendicular to the gravitational field of the earth.
Industry:Aviation
A horizontal reference line used in lofting (laying out the contour of an airplane fuselage). Waterline zero (WL 0) is used as the reference, and measurements above this line are positive water lines. Measurements below WL 0 are negative waterlines. An object located on WL 104 is 104 inches above WL 0.
Industry:Aviation
