pressure altitude—The altitude in the standard atmosphere at which the pressure is the same as at the point in question.
PRESSURE ALTITUDE - The apparent altitude which varies as air pressure (and this density) varies.
PROPELLER - A device with angled blades that is spun by the engine so as to push air backwards and thereby create forward motion or thrust.
Pressure Altitude: The standard altitude of a given pressure: Example 500 mb = 18,000 ft.
Pressure Change: The difference between the beginning reading of barometric pressure and the end of a particular time reading.
where Z is the actual altitude above mean sea level and Zp is the pressure altitude of the same point.
dadur"In India, a wind blowing down the Ganges Valley from the Siwalik hills at Hardwar.
dahatoe"See aloegoe.
Density Altitude - The pressure altitude corrected for temperature deviations from the standard atmosphere. It is used by pilots when setting aircraft performance.
A measure, in pressure altitude above sea level, at which the condensation level will be located. This is the approximate level, on a well mixed convective atmosphere (no inversions or caps), one will expect cloud bases to be at.
International Standard Atmosphere (ISA) is the 'average' atmosphere any pressure level has a standard corresponding altitude called 'pressure altitude' and temperature called the 'ISA temperature'.
Isobars ...
 See also: Pressure, Normal, Altitude, Temperature, Weather
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