Eight Army rotary wing aviators made judgments concerning the ground speed and altitude of a UH-1 helicopter. Combinations of three ground speeds and four altitudes were used across four visual conditions including daylight and simulated night environments. In general, the results indicate: (1) Absolute error in ground speed estimations increased as altitude increased; (2) At ground speeds above 50 knots there was a tendency to underestimate ground speeds, and below 50 knots ground speed estimates were dependent upon visual cinditons. (3) Absolute error in altitude judgment increases with aircraft altitude; and (4) At low altitudes the trend is toward understimation and as altitude and airspeed increase the tendency is to overestimate altitude. These and other results are discussed as well as their possible implications for conduct of safe flight. (Author)


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    Title :

    Perceived Velocity and Altitude Judgments During Rotary Wing Aircraft Flight


    Contributors:
    R. N. Armstrong (author) / M. A. Hofmann (author) / M. G. Sanders (author) / L. W. Stone (author) / C. A. Bowen (author)

    Publication date :

    1975


    Size :

    30 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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