- 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 reciprocating engine in which the intake and exhaust valves are located in the cylinder head. This type of engine is also called a valve-in-head engine.
Industry:Aviation
A reciprocating engine piston with fins cast or forged on the bottom of the head, inside the piston. The fins cross to form a pattern that looks much like the surface of a waffle. The fins strengthen the piston head and provide extra surface area to increase the amount of heat the oil can carry away from the piston.
Industry:Aviation
A reciprocating engine that has had its sea-level rated horsepower increased by supercharging. This is the same as a ground-boosted engine.
Industry:Aviation
A reciprocating engine that has too much fuel in its cylinders for it to start, or a turbine engine that has so much fuel in its combustors that it would create a fire hazard or a hot start if the fuel were ignited.
Industry:Aviation
A reciprocating engine that uses a liquid, such as water or ethylene glycol, to remove excess heat. Much of the heat energy in the fuel burned in an engine is wasted and must be carried away from the engine, or it will cause damage.
In a liquid-cooled engine, the liquid coolant circulates around the cylinders in jackets and absorbs heat. This absorbed heat is carried outside the engine in the coolant, and as the coolant passes through a radiator (a liquid-to-air heat exchanger), the unwanted heat is given up to the outside air.
Industry:Aviation
A reciprocating engine that uses an air compressor to increase the pressure of the air before it enters the engine cylinders.
Industry:Aviation
A reciprocating engine that uses atmospheric pressure to force the charge of fuel-air mixture into the cylinders. A naturally aspirated engine differs from a supercharged engine that uses a mechanical air compressor to increase the pressure of the air and force the fuel-air mixture into the cylinders.
Industry:Aviation
A reciprocating engine whose bore and stroke have the same dimensions.
The bore of the engine is the diameter of the cylinders, and the stroke is the distance the piston moves from the top of its travel to the bottom.
Industry:Aviation
A reciprocating engine whose excess heat is removed by transferring it directly into the air flowing over the engine.
The cylinders of an air-cooled engine are fitted with fins to increase the surface area exposed to the air.
Industry:Aviation
A reciprocating engine with axial cylinders arranged around a central shaft. Rollers in the open end of the pistons press against a sinusoidal cam mounted on the shaft to rotate the shaft.
Industry:Aviation
