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  • Comparison of transmission error predictions with noise measurements for several spur and helical gears [microform] / Donald R. Houser ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Adelphi, MD] : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • Analytical and experimental vibration analysis of a faulty gear system [microform] / F.K. Choy ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Adelphi, Md. : U.S. Army Research Laboratory ; Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • TLIFE--a program for spur, helical and spiral bevel transmission life and reliability modeling [microform] / M. Savage ... [et al.].

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program ; [Springfield, Va. : National Technical Information Service, distributor], 1994.
    • 1994

  • Computerized design of low-noise face milled spiral bevel gears [microform] / Faydor L. Litvin, Yi Zhang, and Robert F. Hanschuh.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Adelphi, Md.] : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • Analytical and experimental study of vibrations in a gear transmission [microform] / F.K. Choy ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [St. Louis, Mo.] : US Army Aviation Systems Command, Aviation R&T Activity ; [Springfield, Va. : National Technical Information Service, distributor, 1991?]
    • 1991

  • Advanced Rotorcraft Transmission (ART) Program [microform] : Boeing helicopters status report / Joseph W. Lenski, Jr. and Mark J. Valco.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [St. Louis, Mo.] : US Army Aviation Systems Command, Aviation R&T Activity ; [Springfield, Va. : For sale by the National Technical information Service, 1991?]
    • 1991

  • Face-gear drives [microform] : design, analysis, and testing for helicopter transmission applications / F.L. Litvin ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [St. Louis, Mo.] : US Army Aviation Systems Command ; [Springfield, Va. : National Technical Information Service, distributor, 1992]
    • 1992

  • A review of transmission diagnostics research at NASA Lewis Research Center [microform] / James J. Zakrajsek.

    • Text
    • Cleveland, Ohio : The Center ; [Springfield, Va. : National Technical Information Service, distributor, 1994]
    • 1994

  • Design, manufacture, and spin test of high contact ratio helicopter transmission utilizing self-aligning bearingless planetary (SABP) [microform] / Dezi Folenta and William Lebo.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Scientific and Technical Information Division ; [Springfield, Va. : National Technical Information Service, distributor], 1988.
    • 1988

  • Displaceable spur gear torque controlled driver and method [microform] / inventor, Joseph S. Cook, Jr.

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

  • Bevel gear driver and method having torque limit selection [microform] / inventor, Joseph S. Cook, Jr.

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

  • Study of the kinematic and load sharing properties of wormgearing with non-symmetric tooth profiles [microform] / D.C. Sun and Qin Yuan.

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

  • A system-level mathematical model for evaluation of power train performance of load-leveled electric vehicles [microform] / G.P. Purohit, C.J. Leising ; prepared for U.S. Department of Energy ... by Jet Propulsion Laboratory.

    • Text
    • Pasadena, Calif. : The Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1985]
    • 1984

  • Efficiency study comparing two helicopter planetary reduction stages [microform] / Timothy L. Krantz and Robert F. Handschuh.

    • Text
    • [Washington, D.C.] : NASA ; [Cleveland, Ohio] : US Army Aviation Systems Command, Aviation R&T Activity ; [Springfield, Va. : For sale by the National Technical Information Service, 1990?]
    • 1990

  • Using hob offset to balance dynamic strength in spur gears [microform] / Chuen-Huei Liou ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Adelphi, Md.] : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • Diagnosis of helicopter gearboxes using structure-based networks [microform] / Vinay B. Jammu and Kourosh Danai, David G. Lewicki.

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

  • Design and dynamic simulation of a fixed pitch 56 kW wind turbine drive train with a continuously variable transmission [microform] / C. Gallo ... [et al.].

    • Text
    • [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1986]
    • 1986

  • Influence of tooth profile modification on spur gear dynamic tooth strain [microform] / Fred B. Oswald and Dennis P. Townsend.

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

  • Computerized design and generation of low-noise gears with localized bearing contact [microform] / F.L. Litvin ... [et al.].

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

  • Bell Helicopter Advanced Rotorcraft Transmission (ART) program [microform] : final report / [Zachary S. Henry].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Adelphi, Md.] : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • Transmission diagnostic research at NASA Lewis Research Center [microform] / J.J. Zakrajsek ... [et al.].

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

  • Experimental and analytical assessment of the thermal behavior of spiral bevel gears [microform] / Robert F. Handschuh and Thomas P. Kicher.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration ; [Adelphi, Md.] : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1995]
    • 1995

  • Effects of planetary gear ratio on mean service life [microform] / M. Savage, K.L. Rubadeux, and H.H. Coe.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration, U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Effects of planetary gear ratio on mean service life [microform] / M. Savage, K.L. Rubadeux, and H.H. Coe.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration, U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1997]
    • 1997

  • Gear and transmission research at NASA Lewis Research Center [microform] / Dennis P. Townsend.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration ; [Springfield, Va. : National Technical Information Service, distributor, 1997]
    • 1997

  • Dynamic analysis of spur gear transmissions (DANST) [microform] : PC version 3.00 user manual / Fred B. Oswald, Hsiang Hsi Lin, Irebert R. Delgado.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Experimental study of split-path transmission load sharing [microform] / Timothy L. Krantz and Irebert R. Delgado.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Computerized design and generation of gear drives with a localized bearing contact and a low level of transmission errors [microform] / F. Litvin ... [et al.].

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Evaluation of navy 9 cst oil in Bell helicopter M412 HP gearboxes [microform] / Zachary S. Henry and William R. Stapper.

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

  • A preliminary study on the vapor/mist phase lubrication of a spur gearbox [microform] / Wilfredo Morales, Robert F. Handschuh.

    • Text
    • [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center : U.S. Army Research Laboratory ; Springfield, VA : National Technical Information Service, distributor, [1999]
    • 1999

  • Improving the performance of the structure-based connectionist network for diagnosis of helicopter gearboxes [microform] / Vinay B. Jammu and Kourosh Danai ; David G. Lewicki.

    • Text
    • [Washington, DC] : National Aeronautics and Space Administration : U.S. Army Research Laboratory ; [Springfield, Va. : National Technical Information Service, distributor, 1996]
    • 1996

  • Evaluation of carburized and ground face gears [microform] / David G. Lewicki ... [et al.].

    • Text
    • [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1999]
    • 1999

  • Development of gear technology and theory of gearing [microform] / Faydor L. Litvin.

    • Text
    • [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center ; [Springfield, Va. : National Technical Information Service, distributor, 1997]
    • 1997

  • Design, generation and tooth contact analysis (TCA) of asymmetric face gear drive with modified geometry [microform] / Faydor L. Litvin ... [et al.].

    • Text
    • [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center ; Hanover, MD : Available from NASA Center for Aerospace Information, [2001]
    • 2001
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS22963

  • Testing of YUH-61A helicopter transmission in NASA Lewis 2240-kW (3000-hp) facility [microform] / Andrew M. Mitchell, Fred B. Oswald, and Fredrick T. Schuller.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; Springfield, Va. : For sale by the National Technical Information Service, 1986.
    • 1986

  • System life and reliability modeling for helicopter transmissions [microform] / M. Savage and C. K. Brikmanis.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; Springfield, Va. : For sale by the National Technical Informationc Service, 1986.
    • 1986

  • Comparison of predicted and measured temperatures of UH-60A helicopter transmission [microform] / Harold H. Coe.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.
    • 1989
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS60001

  • Advanced Rotorcraft Transmission Program [microform] / Robert C. Bill.

    • Text
    • [Cleveland, Ohio : Lewis Research Center, 1990]
    • 1990
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS65734

  • Effects of gear box vibration and mass imbalance on the dynamics of multi-stage gear transmissions [microform] / Fred K. Choy, ... [et al.].

    • Text
    • [Cleveland, Ohio : Lewis Research Center, 1991]
    • 1991
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS65735

  • Determination of real machine-tool settings and minimization of real surface deviation by computerized inspection [microform] / Faydor L. Litvin, Chihping Kuan, and Yi Zhang.

    • Text
    • [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program ; [Springfield, Va. : For sale by the National Technical Information Service], 1991.
    • 1991
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS67014

  • Non-linear dynamic analysis of geared systems. Part II, final report [microform] / Rajendra Singh, Donald R. Houser, and Ahmet Kahraman.

    • Text
    • [Columbus, Ohio] : The Ohio State University, Dept. of Mechanical Engineering ; Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, [1990]
    • 1990
    • 1 Resource

    Available Online

    http://purl.access.gpo.gov/GPO/LPS69738

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