Error in airspeed measurement due to the static-pressure field ahead of an airplane at transonic speeds

Thomas C. O'Bryan, Edward C. B. Danforth, J. Ford Johnston
naca-report-1239
1955


The magnitude and variation of the static-pressure error for various distances ahead of sharp-nose bodies and open-nose air inlets and for a distance of 1 chord ahead of the wing tip of a swept wing are defined by a combination of experiment and theory. The mechanism of the error is discussed in some detail to show the contributing factors that make up the error. The information presented provides a useful means for choosing a proper location for measurement of static pressure for most purposes.

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