The preliminary airworthiness evaluation of the UH-1H helicopter equipped with the receiver antenna of the Terrain Mapping Radar System was conducted in Lakehurst, New Jersey, between 21 November and 8 December 1986. The evaluation required 12 flights for a total of 14.8 hours, or which 12.0 hours were productive. Performance, handling qualities, and structural dynamic response tests were conducted. The modified UH-1H equipped with the receiver antenna demonstrated adequate handling qualities for the terrain mapping mission. However, the proposed mission profile requires extensive operation of the helicopter in an out-of-ground effect (OGE) hover. Although the handling qualities are acceptable, the degraded autorotational characteristics may preclude a safe autorotational landing in the event of a sudden engine failure at an OGE hover below 1000 feet above ground level. The minimum directional control margin and high pilot workload to maintain heading during low speed flight were a shortcoming. Three additional shortcomings were found during the evaluation.


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    Title :

    Preliminary Airworthiness Evaluation of a UH-1 Equipped with a Terrain Mapping Receiver Antenna


    Contributors:
    F. W. Stellar (author) / J. D. Brown (author) / C. P. Butler (author)

    Publication date :

    1987


    Size :

    38 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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