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pressure altitude
- Definição1
- 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.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 2nd ed. Renton: ASA, 1991.
- Definição2
- The height above the standard pressure level of 29.92 in. Hg. It is obtained by setting 29.92 in the barometric pressure window and reading the altimeter.
- Fonte2
- FEDERAL AVIATION ADMINISTRATION. Rotorcraft flying handbook (FAA-H-8083-21). Washington, DC: FAA, 2000. Disponível em: http://www.faa.gov/library/manuals/aircraft/media/faa-h-8083-21.pdf. Acesso em: 10 fev. 2012.
- Contexto
- Pressure altitude, as opposed to true altitude, is an important value for calculating performance as it more accurately represents the air content at a particular level. The difference between true altitude and pressure altitude must be clearly understood. True altitude means the vertical height above mean sea level and is displayed on the altimeter when the altimeter is correctly adjusted to the local setting.
- Subárea
- Meteorology
- Broader Term
- altitude
- Français
- altitude-pression