A flight evaluation of the AN/APN 191 radar altimeter was conducted to determine its accuracy and suitability as a test instrument. The testing consisted of 9.7 flight hours with the altimeter system installed in a UH-1C helicopter. Results show that the AN/APN 191 altimeter system has a large random error and is not as accurate as present altitude determination methods. Therefore, this altimeter is unsatisfactory as a test instrument. The indicator scale and sensitivity were excellent; and the accuracy was not affected by attitude, vertical speed, or airspeed variations. (Author)


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    Title :

    Flight Evaluation An/Apn 191 Radar Altimeter


    Contributors:
    G. L. Bender (author) / J. R. Burden (author)

    Publication date :

    1970


    Size :

    29 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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