A limited evaluation of the capability of the UH-1H helicopter to fly in an artificial icing environment was conducted at Fort Wainwright, Alaska, from 17 September through 29 October 1973. Testing was performed by the United States Army Aviation Systems Test Activity and consisted of 13.7 productive flight hours. During this test, one enhancing characteristic, three deficiencies, and four shortcomings were noted. Heat from the engine exhaust prevents ice from accumulating on the tail rotor and on inboard sections of the synchronized elevator and vertical stabilizer, and is an enhancing characteristic. The deficiencies are asymmetrical shedding of ice from the main rotor system, obscured forward vision due to formation of ice on the windshield, and the inability to maintain autorotational rotor speed within operational limits with ice accumulation on the main rotor blades. Four shortcomings attributable to the UH-1H helicopter are obscured downward view due to formation of ice on the chin bubble, the scratching of the windshield by the wiper blade, large-amplitude oscillations of the FM whip antenna after accreting small amounts of ice, and inaccurate outside air temperature indications for flight in icing conditions. (Modified author abstract)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Artificial Icing Tests UH-1H Helicopter. Part I


    Contributors:
    W. E. Griffith (author) / R. B. Smith (author) / L. K. Brewer (author) / M. L. Hanks (author) / J. S. Reid (author)

    Publication date :

    1974


    Size :

    65 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Artificial Icing Tests AH-1G Helicopter

    C. F. Mittag / R. B. Smith / M. L. Hanks et al. | NTIS | 1974


    Artificial Icing Tests CH-47C Helicopter

    C. F. Mittag / J. C. O'Connor / L. Kronenberger | NTIS | 1974


    Artificial Icing Tests UH-1H Helicopter. Part 2. Heated Glass Windshield

    W. E. I. Griffith / C. F. Mittag / M. L. Hanks et al. | NTIS | 1974


    Artificial Icing Tests UH-1H Helicopter. Part II. Heated Glass Windshield

    W. E. Griffith / C. F. Mittag / M. L. Hanks et al. | NTIS | 1974