- Settore: 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 printer used to produce a hard copy of the information being processed by a computer. A laser shines a series of dots of light in a matrix pattern onto the surface of the paper as it moves in front of the print head, and each dot of light leaves the paper with an electrostatic charge.
A dust of metallic powder, called toner, is blown across the paper, and some of it sticks to the charged areas. None, however, sticks to the uncharged portion of the paper. The paper with the powder sticking to the charged areas passes over a heater, which fuses, or melts, the powder into the paper to form a permanent image.
Industry:Aviation
A type of propellant used for rocket engines in which the fuel and the oxidizer are both parts of a single substance.
Industry:Aviation
A type of propeller used on aircraft when low cost and simplicity are more important than efficient performance.
The blades of a fixed-pitch propeller are set at one pitch angle which cannot be changed.
Up through World War II, most fixed-pitch propellers were made of laminated birch, but since that time, most have been made of forged aluminum alloy.
The pitch angle of a fixed-pitch propeller is a compromise between that which allows the engine to turn fast enough to produce the maximum horsepower for takeoff, and that which moves the aircraft through the air a maximum distance for each revolution, giving the best fuel economy and speed.
Industry:Aviation
A type of propeller used on an airplane to hold the engine at a constant RPM as the air load on the propeller changes. A centrifugal governor senses the engine RPM, and if it increases above that for which the governor is set, the pitch of the propeller blades will increase. This increased blade angle increases the air load on the propeller, and the engine slows down.
If the RPM drops below that for which the governor is set, the propeller pitch will decrease, and the decreased air load allows the engine to speed back up to its on-speed condition.
Industry:Aviation
A type of radar display in which the time base (distance or range) is displayed on a horizontal line and the target appears as a vertical displacement along the time base.
Industry:Aviation
A type of radar that operates in the frequency range from approximately 10.9 to
36.0 gigahertz. The wavelength of K-band radar is between about 2.73 to 0.83 centimeters.
Industry:Aviation
A type of radar used at an airport to guide an aircraft through the final stages of landing. The radarscope has two plots: one showing the position of the aircraft along an extended center line of the runway, and the other showing the position of the aircraft as it descends along the glide slope to the runway.
The radar operator directs the pilot to change heading or adjust the descent rate to keep the aircraft on a path that allows it to touch down at the correct spot on the runway.
Industry:Aviation
A type of radar used to identify aircraft flying along controlled airways. Ground radar at the airways traffic control center transmits a pulse of electromagnetic energy. When this pulse is received by the transponder, it replies with a special coded pulse.
The coded reply is received by the ground radar and displayed on the controller’s radar scope to show the location of the aircraft. An encoding altimeter directs the transponder to use a code that shows the altitude the aircraft is flying. This altitude shows up as numbers beside the return on the radar screen.
Industry:Aviation
A type of radial engine with two rows of cylinders and a single crankshaft. The cylinders of a radial engine project out from a small crankcase that holds the crankshaft. The piston in one cylinder attaches to a master rod whose large end goes around the crankshaft throw, and the pistons in all of the other cylinders attach to the master rod with link rods.
A twin-row radial engine has a two-throw crankshaft and two rows of cylinders and two master rods. The cylinders in the rear row are staggered between those in the front row for improved cooling. The most popular twin-row radial engines have 14 or 18 cylinders.
Industry:Aviation
A type of radiator used on some of the liquid-cooled racing airplanes. The radiator is made of two thin sheets of brass, slightly separated so the heated coolant can flow between them. A skin radiator may be mounted on the surface of the wing, the sides of the fuselage, or on the floats of seaplanes. Air flowing over the smooth surface of the radiator removes heat from the coolant.
Industry:Aviation
