- 行业: 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 method of time-regulating arrival traffic flow into a terminal area so as not to exceed a predetermined terminal acceptance rate.
Industry:Aviation
A method of timing the dual ignition of a reciprocating engine. When the timing is staggered, the spark plug nearest the exhaust valve fires before the spark plug nearest the intake valve.
In some engines, the exhaust gases are not completely scavenged, and they dilute the fuel-air charge in the cylinder. This diluted charge near the exhaust valve burns more slowly than the undiluted charge near the intake valve, and it is therefore ignited earlier.
Industry:Aviation
A method of transmitting radio-frequency electromagnetic energy in the form of long and short spurts that may be considered to be dashes and dots.
The electromagnetic energy radiates from a transmitting antenna, and this is picked up at some distant location by a receiving antenna. The long and short spurts of energy are converted into letters and numbers according to the International Morse code.
Industry:Aviation
A method of treating crude rubber with heat to give it such useful properties as elasticity, strength, and chemical and dimensional stability.
Industry:Aviation
A method of treating the lubricating oil to make it possible to start a reciprocating engine when the temperature is very low. When the oil gets cold, it becomes thick and hard to move, making it difficult for the starter to turn the engine over fast enough for it to start.
Before shutting the engine down, enough gasoline from the fuel system is mixed with the lubricating oil to dilute it, so the starter can turn the engine over when the oil is cold. When the engine starts and the oil warms up, the gasoline evaporates from it. The oil is not damaged by diluting it.
Oil dilution is no longer needed because multiviscosity oil is thin enough at low temperature to allow the engine to start.
Industry:Aviation
A method of treating the walls of aircraft reciprocating engine cylinders that hardens them and increases their ability to hold lubricants. Worn cylinder barrels may be ground so their bore is straight and round. Then hard chromium is electroplated on the walls to a depth that brings the diameter of the cylinder bore back to its original dimension.
The surface of the hard chrome plating resembles a maze of spiderwebs, with thousands of tiny, interconnected cracks. After the correct depth of chromium has been deposited, the electroplating current is reversed, and the tiny cracks enlarge enough to hold oil.
Porous chrome plating provides a hard, wear-resistant surface over which the piston rings ride. The oil trapped in the tiny grooves furnishes lubrication to minimize piston ring and cylinder wall wear and helps the rings seal.
Industry:Aviation
A method of using a transformer to join, or couple, stages of an electronic device, such as an amplifier. The impedance of the primary winding of the coupling transformer is the same as the output impedance of the first stage, and the impedance of the secondary winding is the same as the input impedance of the following stage. Impedance coupling is primarily used in circuits carrying audio-frequency AC because of the limited bandwidth of the coupling transformer.
Industry:Aviation
A method of using angled, parallel lines to show that a section of a drawing has been cut away. Different arrangements of the cross-hatch lines are used to identify the material of which the part is made.
Industry:Aviation
A method of using marks of different colors to identify materials. Some electrical resistors and capacitors have color codes to show their value and tolerances. Bungee shock cords use color codes to indicate the year and quarter of the year in which they were made.
Color codes are used to identify the type of steel in steel bars and rods. Colored bands are used around aircraft plumbing to identify the fluid being carried in the line.
Industry:Aviation
A method of vibration dampening, used in certain Bell helicopters to reduce the vibration of the main rotor system.
Industry:Aviation
