Calibrations of the static-pressure or 'position' errors of the service airspeed installations of 10 present-day airplanes are presented. The installations are representative of most of the systems in use at the present time and include static-pressure vents on the nose and the rear section of the fuselage and pitot-static tubes mounted on the wing, the vertical tail, and the nose of the fuselage. Each of the installations was calibrated under steady flight conditions by means of a trailing static-pressure tube. The tests were conducted from speeds near the stall to maximum indicated speeds not exceeding 260 miles per hour. Calibrations of representative flight conditions (climb, glide, Wave-off, and landing) were obtained in order to show the variation of static-pressure error with engine power and flap setting. The position errors for the various flight conditions are presented as static-pressure errors and as airspeed and altitude errors. Analysis of the data presented showed that the static-pressure error for static vents on the rear section of the fuselage remained approximately constant with angle of attack and became more negative with flap deflection. The static-pressure errors for the wing, fuselage-nose, and vertical-tail installations became more negative with increasing angle of attack and more positive with flap deflection; the effect of engine power for these installations followed no consistent trend.


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    Title :

    Position Errors of the Service Airspeed Installations of 10 Airplanes


    Contributors:
    W. Gracey (author)

    Publication date :

    1949


    Size :

    45 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English