- 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 measure of the amount of travel provided by an airline, steamship line, or railroad. One passenger mile is the carriage of one passenger for one mile.
Industry:Aviation
A measure of the capacity of a battery when it is supplying a high rate of current, such as it would if it were being used to crank a cold engine.
The cold-cranking amps discharge rate is similar to the five-minute discharge rate that specifies the number of ampere-hours of capacity the battery has when it is discharged at a rate that will drop its cell voltage to a specified low value in five minutes.
The ampere hour capacity of a battery at its five-minute discharge rate is much lower than its capacity at the other discharge rates. The actual capacity at this rate is given in the specifications the manufacturer issues for each battery.
Industry:Aviation
A measure of the capacity of a thermodynamic system to undergo a spontaneous change. Entropy varies with the change in the ratio of the increment of heat taken in to the absolute temperature at which it is absorbed.
Industry:Aviation
A measure of the change in the viscosity of a fluid with a change in its temperature.
The higher the viscosity index, the less the viscosity changes with the temperature.
Industry:Aviation
A measure of the cooling effect of an air conditioning system. One ton of refrigeration is the amount of cooling produced when one ton of ice melts in a 24-hour period.
Industry:Aviation
A measure of the cooling effect of the wind. Wind chill factor is based on both the temperature of the air and the velocity of the wind.
Industry:Aviation
A measure of the ease with which lines of magnetic flux can pass through a material. The permeability of a material is found by dividing the flux density (B), in lines per square inch, by the magnetizing force (H), in ampere-turns per inch, needed to produce this flux density.
Air is used as the reference, and it is assigned a permeability of one. Pure iron has a permeability of about 200,000.
Industry:Aviation
A measure of the effectiveness of a system or device. Efficiency is found by dividing the output of the device by its input, and it is usually expressed as a percentage.
If the output of a device is exactly the same as its input, the device has an efficiency of 100%. If its output is only one half of its input, its efficiency is 50%.
Industry:Aviation
A measure of the effectiveness with which an aircraft engine converts the fuel it burns into useful thrust, and is the ratio of the thrust horsepower produced by a propeller to the torque horsepower of the shaft turning the propeller.
The more nearly the speed of the aircraft is to the speed of the exhaust jet or propeller wake, the less kinetic energy is lost in the jet or wake, and the higher the propulsive efficiency.
Industry:Aviation
A measure of the efficiency of a turboprop engine. It is the number of pounds of fuel burned per hour to produce one equivalent shaft horsepower (ESHP) and is found by dividing the fuel flow, in pounds per hour, by the ESHP.
Industry:Aviation
