- 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 condition that can exist when a high-speed airplane is landed on a water-covered runway. High-speed airplanes use relatively narrow, high-pressure tires that, when the brakes are applied, try to lock up and skid on the surface of the water in much the same way a water ski rides on the surface. A hydroplaning tire can develop enough heat to ruin it. Effective anti-skid brake systems prevent hydroplaning.
Industry:Aviation
A condition that can occur in a nickel-cadmium battery in which the battery overheats because of excess current. A nickel-cadmium battery has a very low internal resistance, but if an excessive amount of current flows from it, even its low resistance will cause it to overheat. The center cells get hotter than the outer cells, which transfer some of their heat to the outside air, and when the center cells overheat, their voltage and resistance both drop.
When the generator puts current back into the battery, the center cells take the most current and get even hotter. As they get hotter, their voltage and resistance continue to drop, and they take more current. This current increase continues until the battery is destroyed.
Industry:Aviation
A condition that can occur in a pressurized aircraft when part of the structure fails and releases the pressure inside the cabin at an explosive rate.
Industry:Aviation
A condition that exists in a fluid pump when there is not enough pressure in the reservoir to force fluid to the inlet of the pump. The pump picks up air instead of fluid.
Industry:Aviation
A condition that exists when the distribution of winds within a given area is such that there is a net horizontal flow of air outward from the region.
In divergence at lower levels, the resulting movement of air away from the surface is compensated for by subsidence of air from aloft. The air is heated and the relative humidity is lowered, making divergence a warming and drying process. Low-level divergent regions are areas in which clouds and precipitation are unlikely to form. Divergence is the opposite of convergence.
Industry:Aviation
A condition that occurs near the end of the charging cycle of lead-acid storage batteries. Hydrogen and oxygen are released as free gases, hydrogen at the negative plate, and oxygen at the positive plate.
Industry:Aviation
A conductor in both three-wire single-phase, and Y-connected three-phase electrical systems in which the voltage is the same between it and any of the other conductors. The neutral conductor in a three-wire single-phase system is normally grounded with 110 volts between either line and the neutral conductor, and 220 volts between the two lines. In a Y-connected, three-phase system, there is normally 120 volts between any of lines and the neutral conductor and 208 volts between any two of the lines.
Industry:Aviation
A conductor used to transfer electrical energy from its source to the load using it.
Industry:Aviation
A conductor used with a radio transmitter or receiver to radiate or receive electromagnetic energy.
Industry:Aviation
A conductor, or part of an electrical component through which electrons flow to or from an external circuit. The carbon rod and zinc can are electrodes in a carbon-zinc battery. The emitter, base, and collector are the electrodes in a bipolar transistor.
Industry:Aviation
