altimeter correction

altimeter correction

altimeter correctionclick for a larger image
The amount of height that must be added to the height indicated by an altimeter to obtain true height above the sea level. The altimeter is set to the standard altimeter setting.
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The hypsometric equation combines the hydrostatic equation used in the above stack effect formula with the ideal gas law and is the basis for the table values published in the Aeronautical Information Manual for altimeter correction when flying between airports at different temperatures.
Building Static Pressure In Cold Climates
It's partially the data that's evaluated during the test and then recorded on an altimeter correction card affixed to the logbooks (each altimeter in the aircraft should always be mated with a correction card).
Pitot/static checks: the FARs require biennial inspections because a lot can go wrong in 24 months, regardless of whether you fly behind glass or steam gauges
Regardless, such a system may require activation by maintenance personnel during installation in order to be functional, and some systems may apply temperature ased altimeter corrections all the time.
Fine print: It your job to determine if it legal to fly an approach procedure, not ATC's. Find the answers you need in the notes on the appropriate chart
The system of putting altimeter corrections in the maintenance logs is one of the biggest tricks played upon pilots by mechanics.
Cold-air altimeters: perhaps you have a dusty memory that cold weather has an unwanted effect on altimeter readings. Does this really matter? It can

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