compressibility correction

compressibility correction

[kəm‚pres·ə′bil·əd·ē kə′rek·shən]
(fluid mechanics)
The correction of the calibrated airspeed caused by compressibility error.

compressibility correction

A correction applied to rectified airspeed to get equivalent airspeed. This correction is always negative but is generally negligible below 200 to 240 knots.
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