- Industry: 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 ...
The altitude in standard atmosphere at which the pressure is the same as the existing pressure. Because a pneumatic altimeter operates solely on pressure, pressure altitude is the uncorrected altitude indicated by an altimeter when its barometric scale is adjusted to standard sea-level pressure of
29.92 inches of mercury, or 1013.2 millibars.
Industry:Aviation
The altitude of an aircraft determined by a radar-type radio altimeter. It is the actual distance between the aircraft and the nearest terrain feature.
Industry:Aviation
The altitude of an aircraft transmitted via the Mode C transponder feature that is visually displayed in 100-foot increments on a radarscope having altitude readout capability.
Industry:Aviation
The amount a crankshaft is bent. Runout is checked by supporting the crankshaft in V-blocks or rollers and mounting a precision dial indicator so its arm rides around the end of the crankshaft as it is rotated.
As the shaft is turned, the dial indicator shows the amount, usually in thousandths of an inch, the shaft is bent, or the amount it is run out.
Industry:Aviation
The amount a value changes from its at-rest, or normal, condition to its maximum condition.
Industry:Aviation
The amount by which one quantity is greater or less than another. The answer in a subtraction problem is called the difference.
Industry:Aviation
The amount of any substance dissolved or deposited in electrolysis is proportional to the total electrical charge passed.
Industry:Aviation
The amount of clearance between the teeth of two meshed gears. It is very important that the correct amount of gear backlash be maintained when meshing gears. If there is no backlash, the teeth cannot be properly lubricated, and the gears will wear excessively. If there is too much backlash, the load is not properly transmitted from one tooth to the other.
Gear backlash is measured by holding one gear still and measuring, with a dial indicator, the amount the meshing gear can move back and forth. Service manuals for equipment using gears specify the amount of gear backlash required.
Industry:Aviation
The amount of current needed to move the pointer of a voltmeter across its full scale. Voltmeter sensitivity, which is expressed in terms of ohms per volt, is found by dividing the total resistance of the meter by its full-scale voltage.
Industry:Aviation
The amount of curve of an airfoil section. The curve on the top of the airfoil is called the upper camber, and the curve on the bottom is called the lower camber.
The mean camber is a line drawn through a series of points, each of which is located midway between the upper and the lower camber.
Industry:Aviation
