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Drive Systems Technology, Inc.

Mechanical Power Transmission Consultants

 

Raymond J. Drago, PE, Chief Engineer

24 Marlborough Lane

Glen Mills, PA 19342-1519

V: 610-358-0785 F: 610-358-2776 Web: www.gear-doc.com   E-Mail: GearDoctor@Verizon.net

 

1. DESIGN, FABRICATE, TEST, AND EVALUATE SPIRAL BEVEL SUPPORT BEARINGS (TAPERED ROLLER)

December 1972 - A. J. Lemanski, J. W. Lenski, Jr., and R. J. Drago, Contract DAAJ02-71-0025, Eustis Directorate, U. S. Army Mobility and Research Development Laboratory, Fort Eustis, VA

 

2. TEST RESULTS REPORT - GEAR TOOTH FORM EVALUATION, PE 327, HLH

November 1973 - R. J. Drago, Contract DAAJ01-71-C-0840 (P40), Boeing Document No. T301-10253-1

 

3. AN ANALYTICAL AND EXPERIMENTAL INVESTIGATION OF THE CONTACT CONDITIONS AT THE ROLLER END/CONE RIB OF A TAPERED ROLLER BEARING

November 1973 - R. J. Drago and J. W. Lenski, Jr., AGMA Paper No. 109.32, American Gear Manufacturers Association, 1973 Semi-Annual Meeting, New Orleans, Louisiana

 

4. NUTATING MECHANICAL TRANSMISSION (MAROTH DRIVE PRINCIPAL)

January 1974 - R. J. Drago and A. J. Lemanski, Contract N00014-72-C-0272, Department of the Navy, Office of Naval Research, Arlington, VA, DDC No. AD777988

 

5. HEAVY LIFT HELICOPTER BRINGS UP DRIVE IDEAS

March 1974 - R. J. Drago, Power Transmission Design, Pages 49-63

 

6. HIGH FREQUENCY VIBRATION MONITORING FOR GEAR/BEARING SYSTEM FAILURE DETECTION

October 1975 - R. J. Drago and D. B. Board, AGMA Paper No. 109.36, American Gear Manufacturers Association 1975 Semi-Annual Meeting, Montreal, Canada

 

7. LOAD CAPACITY RATING OF INVOLUTE SPLINES

February 1976 - R. J. Drago, Machine Design, Pages 104-109

 

8. HELICOPTER DRIVE SYSTEM DESIGN WITH APPLICATIONS OF ADVANCED TECHNOLOGY

April 1976 - Invited Lecture, R. J. Drago, Rochester Section, American Society of Mechanical Engineers, Rochester, NY

 

9. LIMITATIONS OF CURRENT TOOTH ROOT STRESS ANALYSIS

May 1976 - R. J. Drago, AGMA Paper No. 220.20, American Gear Manufacturers Association, Aerospace Gearing Committee Meeting, Atlanta, Georgia

 

 

 

10. HIGH FREQUENCY VIBRATION MONITORING TECHNIQUES FOR INCIPIENT FAULT DETECTION IN SPIRAL BEVEL GEAR SYSTEMS

April 1977 - R. J. Drago and R. B. Aronson, AGMA Paper No. 109.38, American Gear Manufacturers Association, Aerospace Gearing Committee Meeting, Orlando, FL

 

11. PREDICTING THE OCCURRENCE AND MONITORING THE PROGRESSION OF FAILURES IN ROTATING MACHINERY

October 1977 - R. J. Drago, Illinois Institute of Technology, National Conference on Power Transmission, Chicago, IL

 

12. ENGINEERING SERVICES TO CONDUCT QUALIFICATION TESTING OF PRECISION FORGED SPIRAL BEVEL GEARS

October 1977 - R. J. Drago, AVRADCOM Report No. 76-45, U. S. Army Aviation Research and Development Command, St. Louis, MO

 

13. PRELIMINARY SURFACE LOAD CAPACITY EVALUATION OF PRECISION, INTEGRALLY FORGED SPIRAL BEVEL GEARS

November 1977 - R. J. Drago, AGMA Paper No. 219.09, American Gear Manufacturers Association, 1977 Semi-Annual Meeting, New Orleans, LA

 

14. HELICOPTER TRANSMISSION VIBRATION AND NOISE REDUCTION PROGRAM - VOLUME 1, TECHNICAL REPORT

March 1978 - R. J. Drago, R. W. Howells, J. W. Lenski, Jr., E. G. Schaffer, and J. J. Sciarra, USARTL-TR-78-2A, Applied Technology Laboratory, U. S. Army Research and Technology Laboratories (AVRADCOM), Fort Eustis, VA

 

15. HELICOPTER TRANSMISSION VIBRATION AND NOISE REDUCTION PROGRAM - VOLUME 2, USER'S MANUAL

March 1978 - R. J. Drago, R. W. Howells, J. W. Lenski, Jr., E. G. Schaffer, and J. J. Sciarra, USARTL-TR-78-2A, Applied Technology Laboratory, U. S. Army Research and Technology Laboratories (AVRADCOM), Fort Eustis, VA

 

16. ON THE DESIGN AND MANUFACTURE OF INTEGRAL SPIRAL BEVEL GEARS FOR THE CH-47D HELICOPTER

March 1979 - R. J. Drago, American Gear Manufacturers Association, Aerospace Gearing Committee Meeting, Lake Tahoe, NE

 

17. INCIPIENT FAILURE DETECTION

February 1979 - R. J. Drago, Power Transmission Design, Pages 40-45

18. AN ANALYTICAL APPROACH TO THE SOURCE REDUCTION OF NOISE AND VIBRATION IN HIGHLY LOADED MECHANICAL POWER TRANSMISSION SYSTEMS

July 1979 - R. J. Drago, J. W. Lenski, Jr., and A. Royal, Fifth World Congress on the Theory of Machines and Mechanisms, Concordia University, Montreal, Canada

 

19. NOISE AND VIBRATION REDUCTION IN HELICOPTER GEARBOXES

April 1979 - R. J. Drago and G. A. Pizzigati, American Institute of Aeronautics and Astronautics / American Society of Mechanical Engineers / American Society of Civil Engineers / American Helicopter Society, 20th Joint Structural Dynamics and Materials Conference, St. Louis, MO

 

20. THE PROBLEM OF RESONANT RESPONSE OF HIGH SPEED, LIGHT WEIGHT HELICOPTER GEARING

April 1979 - R. J. Drago and F. W. Brown, American Institute of Aeronautics and Astronautics / American Society of Mechanical Engineers / American Society of Civil Engineers / American Helicopter Society, 20th Joint Structural Dynamics and Materials Conference, St. Louis, MO

 

21. HOW TO MAKE HIGH EFFICIENCY GEARS THAT COST LESS

April 1979 - R. J. Drago, Production, Pages 90-92

 

22. AN ANALYTICAL APPROACH AND SELECTIVE STIFFENING TECHNIQUE FOR THE SOURCE REDUCTION OF NOISE AND VIBRATION IN HIGHLY LOADED MECHANICAL POWER TRANSMISSION SYSTEMS

September 1979 - R. J. Drago, J. W. Lenski, Jr., and A. C. Royal, Fifth European Rotorcraft and Powered Lift Aircraft Forum, Amsterdam, The Netherlands

 

23. WHY GEARS EXPLODE

July 1979 - R. J. Drago and F. W. Brown, Power Transmission Design, Pages 77-80

 

24. THE ANALYTICAL AND EXPERIMENTAL EVALUATION OF RESONANT RESPONSE IN HIGH SPEED, LIGHT WEIGHT, HIGHLY LOADED GEARING

August 1980 - R. J. Drago and F. W. Brown, ASME Paper No. 80-C2/DET 22, Third International Power Transmission and Gearing Conference, San Francisco, CA

 

25. RECENT ADVANCES IN THE EVALUATION OF STRESSES IN HIGH SPEED, LIGHT WEIGHT, HIGHLY LOADED GEARING

August 1980 - R. J. Drago, F. W. Brown, and H. S. Faust, International Conference on Reliability, Stress Analysis, And Failure Prevention, San Francisco, CA

 

 

 

26. SOME PROGRESS IN THE ACCURATE EVALUATION OF TOOTH ROOT AND FILLET STRESSES IN LIGHT WEIGHT, THIN RIMMED GEARS

October 1980 - R. J. Drago and G. A. Pizzigati, AGMA Paper No. 229.21, American Gear Manufacturers Association Fall Technical Meeting, Washington, DC

 

27. NEW APPROACH FOR ANALYZING TRANSMISSION NOISE

November 1980 - R. J. Drago, Machine Design, Pages 114-120

 

 

28. HOW TO DESIGN QUIET TRANSMISSIONS

December 1980 - R. J. Drago, Machine Design, Pages 175-181

 

29. MINIMIZING NOISE IN TRANSMISSIONS

January 1981 - Raymond J. Drago, Machine Design, Pages 143-148

 

30. AN EXPERIMENTAL INVESTIGATION OF THE COMBINED EFFECTS OF RIM THICKNESS AND PITCH DIAMETER ON SPUR GEAR TOOTH ROOT AND FILLET STRESSES

October 1981 - Raymond J. Drago and Ronald V. Lutthans, AGMA Paper No. P229.22, Fall Technical Meeting, Toronto, Canada

 

31. ON THE AUTOMATIC GENERATION OF FEM MODELS FOR COMPLEX GEARS - A WORK-IN-PROGRESS REPORT

February 1982 - Raymond J. Drago, American Gear Manufacturers Association Aerospace Gearing Meeting, San Diego, CA

 

32. FUNDAMENTALS OF GEAR DESIGN

Seminar Text, Copyright 1982, Raymond J. Drago (807 Pages)

 

33. LE SOLLECITAZIONI DELLA RADICE E DEL RACCORDO DENTE NEGLI INGRANAGGI CILINDRICI

June 1982 - Raymond J. Drago, Oragami Di Transmissione, Pages 44-55 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

34. CONTINUING EDUCATION - ON THE ECONOMY PLAN

September 1982 - Raymond J. Drago and Leonard Marchinski, Mechanical Engineering, Volume 104, Number 9, Pages 67-71

 

35. AN IMPROVEMENT IN THE CONVENTIONAL ANALYSIS OF GEAR TOOTH BENDING FATIGUE STRENGTH

October 1982 - Raymond J. Drago, AGMA Paper No. P229.24, American Gear Manufacturers Association Fall Technical Meeting, New Orleans, LA

 

36. GEAR SYSTEM DESIGN FOR MINIMUM NOISE

Seminar Text, Copyright 1982, Raymond J. Drago (205 Pages)

 

37. DEVELOPMENTS IN THE DESIGN, ANALYSIS, AND FABRICATION OF ADVANCED TECHNOLOGY TRANSMISSION ELEMENTS

November 1982 - Raymond J. Drago and J. W. Lenski, Jr., AHS Paper No. RWP-12, American Helicopter Society Rotary Wing Propulsion System Specialists Meeting, Williamsburg, VA (17 Pages)

 

38. OPTIMUM LUBRICATING OIL STUDY

February 1983 - Raymond J. Drago, Naval Air Propulsion Test Center Contract N00140-82-C-3722, Final Technical Report (101 Pages)

 

39. TECHNICAL REPORT Volume I, LARGE ROTORCRAFT TRANSMISSION TECHNOLOGY DEVELOPMENT PROGRAM

February 1983 - Raymond J. Drago and B. R. Uppaluri, NASA Report CR-168116, National Aeronautics and Space Administration, Cleveland, OH (241 Pages)

 

40. COMPUTER PROGRAM USERS MANUAL - Volume II, LARGE ROTORCRAFT TRANSMISSION TECHNOLOGY DEVELOPMENT PROGRAM

February 1983 - Raymond J. Drago and B. R. Uppaluri, NASA Report CR-168117, National Aeronautics and Space Administration, Cleveland, OH (173 Pages)

 

41. COMPUTER PROGRAM FLOW CHARTS - Volume III, LARGE ROTORCRAFT TRANSMISSION TECHNOLOGY DEVELOPMENT PROGRAM

February 1983 - Raymond J. Drago and B. R. Uppaluri, and G. P. Walsh, NASA Report CR-168118, National Aeronautics and Space Administration, Cleveland, OH (307 Pages)

 

42. COMPUTER PROGRAM PARAMETER INDICES AND LISTINGS - Volume IV, LARGE ROTORCRAFT TRANSMISSION TECHNOLOGY DEVELOPMENT PROGRAM

February 1983 - Raymond J. Drago, B. R. Uppaluri, and G. P. Walsh, NASA Report CR-168119, National Aeronautics and Space Administration, Cleveland, OH (403 Pages)

 

43. DEVELOPMENT OF LARGE ROTORCRAFT TRANSMISSIONS

May 1983 - Raymond J. Drago, N. E. Samanich, and J. C. Mack, American Helicopter Society, Thirty Ninth Annual Forum, St. Louis, MO (10 Pages)

 

44. COMBINED EFFECTS OF RIM THICKNESS AND PITCH DIAMETER ON SPUR GEAR TOOTH STRESSES

July 1983 - Raymond J. Drago and R. V. Lutthans, Journal of the American Helicopter Society, Washington, DC (7 Pages)

 

45. RESULTS OF AN EXPERIMENTAL PROGRAM UTILIZED TO VERIFY A NEW GEAR TOOTH STRENGTH ANALYSIS

October 1983 - Raymond J. Drago, American Gear Manufacturers' Association, Fall Technical Meeting, Montreal, Canada (57 Pages)

 

46. BEVEL GEAR ASSEMBLY AND PATTERNING

October 1983 - Raymond J. Drago, Seminar Text

 

 

47. ADVANCED TECHNOLOGY TRANSMISSION ELEMENTS

October 1983 - Raymond J. Drago and Joseph W. Lenski, Jr. Journal of the American Helicopter Society, Washington, DC, Volume 28, Number 4, Pages 44 - 53 (10 Pages)

 

48. EVALUATION OF BEVEL GEAR LOAD CAPACITY

May 1984 - Raymond J. Drago, Bevel Gear Clinic, Society of Manufacturing Engineers, Rochester, NY (44 Pages)

 

49. SPECIAL POWER TRAIN REQUIREMENTS FOR THE NEXT GENERATION OF ROTARY-WING AIRCRAFT

October 1984 - Raymond J. Drago and Joseph W. Lenski, Jr. Advisory Group For Aerospace Research and Development, North Atlantic Treaty Organization (NATO), Neuilly Sur Seine, France: Presented at the 64th Symposium of the Propulsion and Energetics Panel on Gears and Power Systems for Helicopters and Turboprops, Lisbon, Portugal (12 Pages)

 

50. ANALYTICAL AND EXPERIMENTAL TOOTH STRENGTH STUDY OF SPUR PLANET GEARS WITH INTEGRAL BEARINGS

October 1984 - Raymond J. Drago and Bapa R. Uppaluri, American Gear Manufacturer's Association, Fall Technical Meeting, Washington, DC (8 Pages)

 

51. GEAR TOOTH SURFACE DURABILITY TESTING WITH FULL SIZE SPECIMENS

October 1984 - Raymond J. Drago and H. James Nonemaker, American Helicopter Society, National Specialists Meeting, Williamsburg, VA (20 Pages)

 

52. UN CONTRIBUTO ALL'ANALISI CONVENZIONALE DELLA RESISTENZA A FATICIA A FLESSIONE DEGLI INGRANAGGI DENTATI

November 1984 - Raymond J. Drago, Oragami Di Transmissione, Pages 60-73 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

53. A STUDY OF THE POTENTIAL BENEFITS OF THE DEVELOPMENT OF A DEDICATED HELICOPTER TRANSMISSION LUBRICANT

April 1985 - Raymond J. Drago, Pasquale Mangione, Raymond D. Wendrzycki, Advisory Group For Research and Development, North Atlantic Treaty Organization, Aircraft Gear and Bearing Tribological Systems Specialists Meeting, San Antonio, TX (11 Pages)

 

54. DESIGN GUIDELINES FOR HIGH-CAPACITY BEVEL GEAR SYSTEMS

September 1985 - Raymond J. Drago, SAE Technical Paper Series, Paper Number 851571, 1985 International Off-Highway & Powerplant Congress & Exposition, Society of Automotive Engineers, MECCA, Milwaukee, WI (17 Pages)

 

55. A STUDY OF THE POTENTIAL BENEFITS OF THE DEVELOPMENT OF A DEDICATED HELICOPTER TRANSMISSION LUBRICANT

October 1985 - Raymond J. Drago, Pasquale Mangione, Raymond D. Wendrzycki, SAE Technical Paper Series, Paper Number 851832, Aerospace Technology Conference & Exposition, Society of Automotive Engineers, Long Beach, CA (12 Pages)

 

56. CHAPTER 35, HELICAL GEARS, STANDARD HANDBOOK OF MACHINE DESIGN

1986 - Raymond J. Drago, Volume Edited by J. E. Shigley and C. R. Mischke, McGraw-Hill Publishing Company, New York (56 Pages)

 

57. ON THE STRENGTH OF A PLANET GEAR WITH AN INTEGRAL BEARING (A Revaluation)

October 1986 - Raymond J. Drago & Ravi Margasahayam, AGMA Technical Paper 86 FTM 9, Fall Technical Meeting, Hyatt Regency, Chicago, Il (13 Pages)

 

58. TOOTH STRENGTH STUDY OF SPUR PLANET GEARS

September/October 1986 - Raymond J. Drago & Bapa Uppaluri, GEAR TECHNOLOGY - The Journal of Gear Manufacturing, Pages 27-41

 

59. LARGE ROTORCRAFT DEVELOPMENT PROGRAM

November 1986 - Raymond J. Drago, American Helicopter Society Rotary Wing Propulsion Systems Specialists Meeting, Williamsburg, VA

 

60. STRESS ANALYSIS OF PLANET GEARS WITH INTEGRAL BEARINGS; 3D FINITE-ELEMENT MODEL DEVELOPMENT AND TEST VALIDATION

March 1987 - Raymond J. Drago & Ravi Margasahayam, 1987 MSC NASTRAN World Users' Conference, Los Angeles, CA (14 Pages)

 

61. FINITE-ELEMENT STRESS ANALYSIS OF HELICOPTER PLANETARY GEARS

May 1987 - Raymond J. Drago & Ravi Margasahayam, 43rd Annual Forum, American Helicopter Society, St. Louis MO. (15 Pages)

 

62. FINITE-ELEMENT STRESS ANALYSIS OF HELICOPTER PLANETARY GEARS

May 1987 - Raymond J. Drago, Advanced Gear Design Invited Lecture, The University of Pisa, Pisa, Italy

 

63. DEVELOPMENT OF A LARGE SPIRAL BEVEL GEAR ROTORCRAFT TRANSMISSION

June 1987 - Raymond J. Drago & John C. Mack, AIAA/SAE/ASME/ASEE 23rd Joint Propulsion Conference, San Diego, CA, (6 Pages)

 

64. CADAM-NASTRAN-PATRAN INTEGRATION IN THE DESIGN OF HELICOPTER GEARS

March 1988 - Raymond J. Drago, Ravi N. Margasahayam, and H. C. Lin, Spring National Design Engineering Conference, Chicago, IL, (14 Pages)

 

65. ANALYSIS OF THE RESONANT RESPONSE OF HELICOPTER GEARS WITH THE 3D FINITE-ELEMENT METHOD

March 1988 - Raymond J. Drago & Ravi Margasahayam, 1988 MSC/NASTRAN World User's Conference, Los Angeles, CA (15 Pages)

 

66. COMPARATIVE LOAD CAPACITY EVALUATION OF CBN-FINISHED GEARS

October 1988 - Raymond J. Drago, AGMA Fall Technical Meeting, New Orleans, LA, American Gear Manufacturers Association, Alexandria, VA (10 Pages)

 

67. FUNDAMENTALS OF GEAR DESIGN

1988 - Raymond J. Drago, Butterworth Publishers, Stoneham, MA, (560 Pages)

 

68. A NON-LINEAR FINITE ELEMENT APPROACH TO THE GEAR TOOTH LOAD SHARING PROBLEM

March 1988 - Raymond J. Drago & Ravi N. Margasahayam, 1989 MSC/NASTRAN World User's Conference, Los Angeles, CA (25 Pages)

 

69. GEAR TOOTH LOAD SHARING USING NON-LINEAR FINITE ELEMENT METHODS

November 1989 - Raymond J. Drago & Ravi Margasahayam, AGMA Fall Technical Meeting, Pittsburgh, PA, American Gear Manufacturers Association, Alexandria, VA (10 Pages)

 

70. CHAPTER 4, HELICAL GEARS, GEARING, A Mechanical Designer's Workbook

1990 - Raymond J. Drago, Volume Edited by J. E. Shigley and C. R. Mischke, McGraw-Hill Publishing Company, New York (72 Pages)

 

71. GEAR NOISE - THE MANUFACTURING CONNECTION

April 1990 - Raymond J. Drago, American Gear Manufacturers Association Gear Manufacturing Clinic, Radisson Hotel, Columbus, OH (22 Pages)

 

72. CHAPTERS 8 & 15, GEAR DESIGN - MANUFACTURING AND INSPECTION MANUAL

1990 - Raymond J. Drago, Volume Edited The SAE Gear & Spline Committee, SAE Publication AE-15, Society of Automotive Engineers, Warrendale, PA (25 of 643 Pages)

 

73. THE ADVANCED ROTORCRAFT TRANSMISSION PROGRAM, A STATUS REPORT

October 1990 - Raymond J. Drago, AGMA Fall Technical Meeting, Toronto, Ontario, Canada, American Gear Manufacturers Association, Alexandria, VA (15 Pages)

 

74. AIRCRAFT QUALITY HIGH TEMPERATURE VACUUM CARBURIZING

November 1990 - R. J. Cunningham and R. J. Drago, U. S. Army Materials Technology Laboratory Report MTL TR-90-42, U. S. Army Laboratory Command, Watertown, MA

 

75. CHAPTER 2, DUDLEY'S GEAR HANDBOOK, Second Edition

1991 - Raymond J. Drago, Volume Edited by Dennis Townsend, McGraw-Hill, Inc., New York, NY, (49 Pages)

 

76. DESIGN GUIDELINES FOR HIGH-CAPACITY BEVEL GEAR SYSTEMS

January/February 1992 - Raymond J. Drago, GEAR TECHNOLOGY - The Journal of Gear Manufacturing, Pages 16-29

 

77. TRANSMISSIONI AVANZATE PER ELICOTTERI

Part I: January 1992 & Part II: February 1992 - Raymond J. Drago & Joseph W. Lenski, Jr., ORGAMI DI TRANSMISSIONE Pages 28-35 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

78. ANALYTICAL EVALUATION OF RESONANT RESPONSE OF SPIRAL BEVEL GEARS IN THE RAH-66 HELICOPTER FANTAIL TRANSMISSION

July 1992, AIAA/SAE/ASME/ASEE 28th Joint Propulsion Conference and Exhibit, Nashville, TN, July 6-8, 1992, Paper No. AIAA 92-3495 (9 Pages)

 

79. THE DESIGN, DEVELOPMENT, AND MANUFACTURE OF ADVANCED TECHNOLOGY GEARING FOR HOT STRIP ROLLING MILL APPLICATIONS

October 1992 - Raymond J. Drago & Laurence E. Scott, AGMA Fall Technical Meeting, Baltimore, MD, American Gear Manufacturers Association, Alexandria, VA (23 Pages)

 

80. POWERFUL GEARS BREATHE NEW LIFE INTO ROLLING MILLS

March 1993 - Raymond J. Drago & Laurence E. Scott, Jr., Power Transmission Design, Pages 27 - 31

 

81. UPGRADING HOT STRIP MILL PERFORMANCE, PRODUCTION, & RELIABILITY THROUGH THE USE OF ADVANCED TECHNOLOGY GEARS

May 1993 - Raymond J. Drago & Laurence E. Scott, Association of Iron and Steel Engineers, 1993 AISE Spring Convention, Opryland Hotel, Nashville, TN, Paper –17, (25 Pages)

 

 

82. THE RELATIVE NOISE LEVELS OF PARALLEL AXIS GEAR SETS WITH VARIOUS CONTACT RATIOS AND GEAR TOOTH FORMS

October 1993 - Raymond J. Drago, Joseph W. Lenski, Robert H. Spencer. Mark J. Valco, & Fred B. Oswald, AGMA Fall Technical Meeting, Detroit, MI, American Gear Manufacturers Association, Alexandria, VA (17 Pages)

 

83. GEAR SOUND LEVELS WITH VARIOUS TOOTH CONTACT RATIONS AND FORMS

October 1993 - Joseph W. Lenski, Raymond J. Drago, Robert H. Spencer. Mark J. Valco, & Fred B. Oswald, AHS Rotary Wing Propulsion Specialists' Meeting, Williamsburg, VA, American Helicopter Society, Alexandria, VA (15 Pages)

 

84. OVERVIEW OF A FIVE-YEAR RESEARCH, DEVELOPMENT, AND TEST PROGRAM

(Conference Keynote Address)

September 1994 - Raymond J. Drago & Joseph W. Lenski, Jr., International Gearing Conference, University of Newcastle, Newcastle Upon Tyne, England (18 Pages)

 

85. INFLUENCE OF GEAR DESIGN PARAMETERS ON GEARBOX RADIATED NOISE

September 1994 - F. W. Oswald, D. P. Townsend, M. J. Valco, Raymond J. Drago, Joseph W. Lenski, Jr., & R. H. Spencer, International Gearing Conference, University of Newcastle, Newcastle Upon Tyne, England (18 Pages)

 

86. TRASMISSIONI AVANZATE PER LAMINATOI A CALDO: IL PROCESSO DI LAMINAZIONE

July 1995 - Raymond J. Drago & Lawrence E. Scott ORGAMI DI TRANSMISSIONE Pages 48-52 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

87. TRASMISSIONI AVANZATE PER LAMINATOI A CALDO: IL PROGETTO DEGLI INGRANAGGI

August 1995 - Raymond J. Drago & Lawrence E. Scott ORGAMI DI TRANSMISSIONE Pages 36-42 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

88. TRASMISSIONI AVANZATE PER LAMINATOI A CALDO: LA REALIZZAZIONE DEGLI INGRANAGGI

September 1995 - Raymond J. Drago & Lawrence E. Scott ORGAMI DI TRANSMISSIONE Pages 86-95 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

89. GEAR RESONANCE EXPERIENCE WITH F-22 AMAD

October 1996 - Raymond J. Drago, Frederick W. Brown, Ashok D. Sane, Dennis Stremick, 7th International power Transmission and Gearing Conference, ASME International, San Diego, CA, Paper Number 156PTG96, 7 pages

 

90. THE F-22 AMAD GEAR DRIVE - OPTIMIZATION OF RESONANCE CHARACTERISTICS BY DETUNING, COULOMB DAMPING, AND DAMPED FORCED RESPONSE ANALYSES

October 1996 - Raymond J. Drago, Frederick W. Brown, Ashok D. Sane, Dennis Stremick, American Gear Manufacturers Association 1996 Fall Technical Meeting, Cincinnati, OH, 16 Pages

 

91. GEAR MANUFACTURING - METHODS, MACHINES, & TOOLS

November 1996 - Raymond J. Drago, Society of Manufacturing Engineers, Section 15 Technical Meeting, Philadelphia, PA, 50 pages

 

92. UPGRADING MILL GEARING - HOW, WHY, RESULTS

November 1996 - Raymond J. Drago, Symposium on Steel Mill Gearing, Educational Systems Workshops, Pittsburgh, PA, 23 Pages

 

93. ULTRASAFE GEAR SYSTEMS FOR CRITICAL APPLICATIONS - INITIAL DEVELOPMENT

November 1997 - Raymond J. Drago, Frederick W. Brown, Ashok D. Sane, American Gear Manufacturers Association 1997 Fall Technical Meeting, San Diego, CA, 22 Pages

 

94. ADVANCED TECHNOLOGY GEAR DRIVES FOR FLUID MIXING APPLICATIONS

May 1998 - Raymond J. Drago, William F. Hutchings, Alan J. Olderstein, Canadian Society of Mechanical Engineers, CSME Forum 1998, Ryerson Polytechnic University, Toronto, Ontario, Canada, 8 Pages

 

95. THREE DIMENSIONAL CRACK PROPAGATION STUDIES

March 1999 - David G. Lewicki, Raymond J. Drago, Ashok D. Sane, & Paul A. Wawrzynek, 4th World Congress on Gearing and Power Transmission, Paris, France, 11 Pages

 

96. INGRANAGGI “ULTRASAFE” PER APPLICAZIONI CRITICHE - 1a PARTE: IMPOSTAZIONE DEL PROBLEMA

March 1999 - Raymond J. Drago, Ashok Sane & Frederick W. Brown ORGAMI DI TRANSMISSIONE Pages 58-66 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

97. DEVELOPMENT OF GEAR TECHNOLOGY AND THEORY OF GEARING (By Faydor L. Litvin) - A TECHNICAL BOOK REVIEW

July/August 1999 - Raymond J. Drago, , GEAR TECHNOLOGY - The Journal of Gear Manufacturing, Pages 14-15

 

 

 

98. INGRANAGGI “ULTRASAFE” PER APPLICAZIONI CRITICHE - 3a PARTE: OTTIMIZZAZIONE

July 1999 - Raymond J. Drago, Ashok Sane & Frederick W. Brown ORGAMI DI TRANSMISSIONE Pages 76-80 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

99. THE EFFECT OF MATERIAL DEFECTS ON GEAR PERFORMANCE - A CASE STUDY -

October 1999 - Raymond J. Drago & Alejandro Font Filax, American Gear Manufacturers Association 1999 Fall Technical Meeting, Lakewood, CO, 7 Pages

 

100. THE EFFECT OF MATERIAL DEFECTS ON GEAR PERFORMANCE - A CASE STUDY

March/April 2000 - Raymond J. Drago  & Alejandro Font Filax, Gear Technology - The Journal of Gear Manufacturing, pp 18 - 23

 

101. ULTRASAFE GEAR SYSTEMS - SINGLE TOOTH BENDING FATIGUE TEST RESULTS

October 2000 - Raymond J. Drago, Arron Issacson, and Nagesh Sonti, American Gear Manufacturers Association 2000 Fall Technical Meeting, Cincinnati, OH, 9 Pages

 

102. I DIFETTI DEL MATERIALE INFLUENZANO LE PRESTAZIONI

September 2000 - Raymond J. Drago, Alejandro F. Filax ORGAMI DI TRANSMISSIONE Pages 70-76 (Journal of the Italian Gear Manufacturers Association, In Italian)

 

103. ADVANCED TECHNOLOGY GEARING (ATG) IN STEEL MILL APPLICATIONS - UNDERSTANDING MILL GEAR FAILURES - EVALUATION, IDENTIFICATION, MODE, PROGRESSION MECHANISM, PREVENTION, CORRECTION, REDESIGN

February 2001 - Raymond J. Drago, Association of Iron & Steel Engineers, Technical Meeting, Merrillville, Indiana

 

104. UNDERSTANDING LARGE GEAR FAILURES - EVALUATION, IDENTIFICATION, MODE, PROGRESSION MECHANISM, PREVENTION, CORRECTION, REDESIGN

November 2001 - Raymond J. Drago, ASM Materials Solutions Conference, Indianapolis, IN

 

105. MATERIAL AND HEAT TREATMENT RELATED FAILURES OF LARGE MILL GEARS - SYMPTOMS, CAUSES AND REMEDIES

September 2002 - Raymond J. Drago, AISE 2002 Annual Convention and Expo, September 29 - October 2, 2002, Gaylord Opryland Hotel, Nashville, TN 37214, 14 pages

 

 

 

106. CRACK LENGTH AND DEPTH DETERMINATION IN AN INTEGRATED CARBURIZED GEAR/BEARING

October 2002 – Raymond J. Drago and James S. Kachelries, AGMA 2002 Fall Technical Meeting, Cincinnati, OH, 8 Pages

 

107. UNDERSTANDING FAILURES OF LARGE MILL GEARS – CAUSES, PREVENTION, CURES

September 2003 – Raymond J. Drago, 2002 Mill Drive Symposium, The Manufacturer’s Conference Center, Erie, PA, 50 Pages

 

108. CRACK LENGTH AND DEPTH DETERMINATION IN AN INTEGRATED CARBURIZED GEAR/BEARING

Spring 2003 – Raymond J. Drago and James S. Kachelries, AGMA News Digest, Alexandria, VA, 8 Pages

 

109. UNDERSTANDING GEAR FAILURES – MATERIALS AND HEAT TREATMENT ISSUES

October 2003 – Raymond J. Drago, AGMA Gear-Expo, Columbus, OH, 50 Pages

 

110. FAILURE ANALYSIS – THE APPLICATION OF FORENSIC GEAR ENGINEERING

January 2004, Raymond J. Drago, AGMA Regional Meeting, Las Vegas, NV, 143 Pages

 

111. IDENTIFICATION OF MILL GEAR FAILURES – EVALUATION, IDENTIFICATION, MODE, PROGRESSION MECHANISM, PREVENTION, CORRECTION, REDESIGN

April 2004 – Raymond J. Drago, Association for Iron and Steel Technology, Cleveland Regional Meeting, Independence, OH, 37 Pages

 

113. THE ROLE OF A GEAR TECHNOLOGY EXPERT WITNESS IN PRODUCT LIABILITY AND/OR PERSONAL INJURY LITIGATION

November 2004 – Raymond J. Drago.; Special Presentation to the American Gear Manufacturers Association Fall Technical Meeting, Milwaukee, WI

 

114. ADVANCED TECHNOLOGY GEARS IN STEEL MILL APPLICATIONS ENHANCED THROUGH THE APPLICATION LARGE, WELD FABRICATED, CARBURIZED, HARDENED & HARD FINISHED GEAR BLANKS

September 2005 - By Raymond J. Drago, Roy Cunningham, & Steve Cymbala; Mill Gearing Technology Symposium 5, Erie; PA

 

115. THE APPLICATION OF VERY LARGE, WELD FABRICATED, CARBURIZED, HARDENED & HARD FINISHED ADVANCED TECHNOLOGY GEARS IN STEEL MILL GEAR DRIVES

October 2005 - By Raymond J. Drago, Roy Cunningham, & Steve Cymbala; American Gear Manufacturers Association Fall Technical Meeting, Detroit, MI, 18 Pages

116. THE APPLICATION OF VERY LARGE, WELD FABRICATED, CARBURIZED, HARDENED & HARD FINISHED ADVANCED TECHNOLOGY GEARS IN STEEL MILL GEAR DRIVES

May 2006 - By Raymond J. Drago, Roy Cunningham, & Steve Cymbala; Association of Iron & Steel Technology AISTech Technical Meeting, Cleveland, OH, 18 Pages

 

117. A CRANE GEAR FAILURE ANALYSIS – CASE STUDY, OBSERVATIONS, LESSONS LEARNED, RECOMMENDATIONS

October 2006 – By Raymond J. Drago, American Gear Manufacturers Association Fall Technical Meeting, Orlando, FL, 10 Pages

 

118. THE EFFECT OF START-UP LOAD CONDITIONS ON GEARBOX PERFORMANCE & LIFE – FAILURE ANALYSIS AND CASE STUDY

October 2007 - By Raymond J. Drago, American Gear Manufacturers Association Fall Technical Meeting, Detroit, MI, 11 Pages

 

119. HYDROGEN AND INTERNAL RESIDUAL STRESS GEAR FAILURES – SOME FAILURE ANALYSES AND CASE STUDIES

October 2008 – AGMA Technical Paper 08FTM13, By Raymond J. Drago and Roy Cunningham, American Gear Manufacturers Association Fall Technical Meeting, San Antonio, TX, 11 Pages

 

120. THE ANATOMY OF A MICROPITTING INDUCED TOOTH FRACTURE FAILURE ▬ CAUSATION, INITIATION, PROGRESSION & PREVENTION

September 2009 - AGMA Technical Paper 09FTM12, By Raymond J. Drago, P. E., Chief Engineer; Roy J. Cunningham, Metallurgical Engineer; Steve Cymbala, Senior Drives Engineer; Drive Systems Technology, Inc, American Gear Manufacturers Association Fall Technical Meeting, Indianapolis, IN, 12 Pages