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  • Forward sweep, low noise rotor blade [microform] / inventor, Thomas F. Brooks.

    • Text
    • [Washington, DC : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • Computation of helicopter rotor acoustics in forward flight [microform] / Roger Strawn, Rupak Biswas.

    • Text
    • [Moffett Field, Calif.] : Research Institute for Advanced Computer Science, NASA Ames Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • Helicopter tail rotor noise analyses [microform] : final technical report ; period, June 1, 1985 - January 31, 1986 / Albert R. George and S.-T. Chou.

    • Text
    • Ithaca, New York : Sibley School of Mechanical and Aerospace Engineering, Cornell University ; [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1986]
    • 1986

  • Evaluation of a doubly-swept blade tip for rotorcraft noise reduction [microform] / Brian E. Wake and T. Alan Egolf.

    • Text
    • Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1992]
    • 1992

  • Flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise predictions [microform] : semi-annual report to NASA Langley for worked performed under the grant / principal investigators: William J. Devenport, Stewart A.L. Glegg.

    • Text
    • [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • An analysis of blade vortex interaction aerodynamics and acoustics [microform] / by Duck Joo Lee.

    • Text
    • Stanford, CA : Stanford University, Dept. of Aeronautics and Astronautics : Joint Institute for Aeronautics and Acoustics ; [Springfield, Va. : National Technical Information Service, distributor, 1985]
    • 1985

  • UHB engine fan broadband noise reduction study [microform] / Philip R. Gliebe, Patrick Y. Ho, Ramani Mani.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • Reduction of Blade-Vortex Interaction (BVI) noise through X-force control [microform] / Fredric H. Schmitz.

    • Text
    • Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • The spectral and statistical properties of turbulence generated by a vortex/blade-tip interaction [microform] : final technical report ... / William J. Devenport, principal investigator; Kenneth S. Wittmer; Christian W. Wenger.

    • Text
    • Blacksburg, VA : Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University ; [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1997]
    • 1997

  • Helicopter blade-vortex interaction noise with comparisons to CFD calculations [microform] / Megan S. McCluer.

    • Text
    • [Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Mod1/HIRES [microform] : methodology and users' manual / D. Douglas Boyd, Jr. ... [et al.].

    • Text
    • Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1998]
    • 1998

  • Experimental blade vortex interaction noise characteristics of a utility helicopter at 1/4 scale [microform] / David A. Conner and Danny R. Hoad.

    • Text
    • Hampton, Va. : National Aeronautics and Space Administration, Langley Research Center ; [St. Louis, Mo. : United States Army Aviation Research and Development Command, 1984]
    • 1984

  • Helicopter impulsive noise [microform] : theoretical and experimental status / F.H. Schmitz and Y.H. Yu.

    • Text
    • Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; St. Louis, Mo. : United States Army Aviation Research and Development Command, [1983]
    • 1983
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS99773

  • Helicopter model rotor-blade vortex interaction impulsive noise [microform] : scalability and parametric variations / W.R. Splettstoesser ... [et al.].

    • Text
    • Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; St. Louis, Mo. : United States Army Aviation Systems Command, [1984]
    • 1984
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS101194

  • Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Modl/HIRES : methodology and users' manual / D. Douglas Boyd, Jr. [and three others].

    • Text
    • Hampton, Virginia : National Aeronautics and Space Administration, Langley Research Center, March 1998.
    • 1998-3
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo82973

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