NASA sample of clear air turbulence from flight operations of U-2 airplanes was extended to 820,000 mi for altitudes between 20,000 and 75,000 ft; flight measurements indicate that for higher altitudes (40,000 to 75,000 ft), turbulence is less frequent and less severe than for lower altitudes (20,000 to 40,000 ft); turbulence appears to be present at high altitudes less than 1% of time; intensity of turbulence decreases in orderly pattern with increasing altitude and less than 50% of turbulent areas exceeded 10 mi in length; maximum measured value of derived gust velocity was 20 fps at altitude of 52,000 ft; on basis of rough approximations, value corresponds to true gust velocity of 58 fps.


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    Title :

    Review of NASA high-altitude clear air turbulence sampling programs


    Additional title:

    J Aircraft


    Contributors:
    Steiner, R. (author)

    Published in:

    Publication date :

    1966


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :