- Отрасли: 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 switch whose operating control is inside a guard that must be raised before the switch can be actuated. Guarded switches are used for circuits that must not be accidentally operated.
Industry:Aviation
A special test engine used by the Cooperative Fuel Research to determine the octane rating of a hydrocarbon fuel. A CFR engine has a variable compression ratio, and it can be adjusted to cause any fuel being tested to detonate, or explode, rather than burn evenly. The fuel being tested is run in the CFR engine and the compression ratio is adjusted until the fuel detonates.
With the engine adjusted to cause detonation, the fuel under test is shut off, and a reference fuel, which is a mixture of iso-octane and normal heptane, is directed into the engine. The ratio of the iso-octane to heptane is changed until the reference fuel detonates the same as the fuel being tested.
The percentage of iso-octane in the reference fuel having the same detonation characteristics in the CFR engine as the fuel being tested is the octane number given the fuel.
Industry:Aviation
A special thinner used in some types of finishing material, such as lacquer, to slow its drying time. When lacquer or dope dries too fast, the evaporation of the solvents often drops the temperature of the surrounding air enough that moisture condenses out of the air onto the wet finish. This causes the finish to blush, or become dull and porous.
Retarder, added to the lacquer or dope before it is sprayed onto the surface, keeps it from drying too fast. When it dries slowly, the temperature does not drop enough to condense moisture out of the air.
Industry:Aviation
A special threaded plug with a specifically designed hole drilled through it. The diameter and length of the hole and the approach angles to the hole determine the amount of fuel that can flow through the jet for a given pressure drop across it.
Industry:Aviation
A special tool used to install crimp-on terminals on the ends of electrical wires. The tool is designed to exert enough pressure that the barrel of the terminal is squeezed into the strands of the wire to form a strong, low-resistance attachment.
Industry:Aviation
A special transformer that receives a directional signal from the earth’s magnetic field and directs it into an amplifier and then into a gyro-stabilized compass indicator. A flux valve is also called a flux gate.
Industry:Aviation
A special transformer used to connect an antenna to a radio receiver or transmitter.
The antenna coupler allows the maximum amount of energy to be transferred between the antenna and the receiver and between the transmitter and the antenna.
Industry:Aviation
A special transformer-rectifier unit used to charge nickel-cadmium batteries. In addition to a source of direct current, the analyzer has a built-in load bank, timers, indicators, and controls for deep-cycling and recharging these batteries.
Industry:Aviation
A special type of airplane wing made in the form of half of a cylinder. The upper camber of the airfoil section of the channel wing is on the inside of the cylinder, and it forms one half of a venturi. The propeller is installed in such a way that it pulls air through the channel, across the top of the airfoil, and produces lift even when the aircraft has almost no forward speed.
Channel wing aircraft have flown, but technical difficulties have prevented them from becoming popular.
Industry:Aviation
A special type of bolt having a large, cylindrical head with a flat top and a hexagonal socket cut into it. Internally wrenching bolts are used for high-strength and high-temperature applications.
Industry:Aviation
