The use of a strake or spoiler on a helicopter tail boom to beneficially change helicopter tail boom air loads was suggested in the United States in 1975. The anticipated benefits were a change of tail boom loads to reduce required tail rotor thrust and power and improve directional control. High tail boom air loads experienced by the YAH-64 and described in 1978 led to a wind tunnel investigation of the usefullness of strakes in altering such loads on the AH-64, UH-60, and UH-1 helicopters. The wind tunnel tests of 2-D cross sections of the tail boom of each demonstrated that a strake or strakes would be effective. Several limited test programs with the U.S. Army's OH-58A, AH-64, and UH-60A were conducted which showed the effects of strakes were modest for those helicopters. The most recent flight test program, with a Bell 204B, disclosed that for the 204B the tail boom strake or strakes would provide more than a modest improvement in directional control and reduction in tail rotor power.


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    Titel :

    Development in Helicopter Tail Boom Strake Applications in the US


    Beteiligte:
    J. C. Wilson (Autor:in) / H. L. Kelley (Autor:in) / C. C. Donahue (Autor:in) / K. R. Yenni (Autor:in)

    Erscheinungsdatum :

    1988


    Format / Umfang :

    19 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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    Wilson, John C. / Kelley, Henry L. / Donahue, Cynthia C. et al. | NTRS | 1988


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    Adams, Mark | Online Contents | 2004


    The tail boom strake

    Adams, Mark / Newman, Simon | Emerald Group Publishing | 2004


    Flight Characteristics Test of the UH-60A with Tail Boom Mounted Strake

    R. A. Lockwood / W. A. Kelly / R. W. Carson | NTIS | 1986


    Helicopter Tail-Boom Strakes

    Kelley, H. L. / Phelps, A. E., III / Wilson, J. C. | NTRS | 1986