Senior Drives Engineer

Publications & Seminars

RESUME’
Steve Cymbala, Senior Drives Engineer
Drive Systems Technology, Inc.
Mechanical Power Transmission Consultants
24 Marlborough Lane
Glen Mills, PA 19342-1519
Phone: 610-358-0785 Fax: 610-358-2776
Web: www.gear-doc.com; E-Mail: Steve.cymbala@comcast.net

Steve Cymbala was a 34-year employee of the Boeing Company where he held a position of Staff Engineer with the CH-46 Drive Systems Group at the Philadelphia Integrated Defense & Space Group when he retired in 2003. He graduated from The Spring Garden Technical Institute of Technology in 1966 with an Associate Degree in Mechanical Engineering. He also attended Widener University Bachelor of Mechanical Engineering program during 1973-1976 school year. He joined The Boeing Vertol Division in 1966 Mechanical Engineering Technician in the Model CH-46 Equipment Group where he supported design efforts of the various equipment projects, most notably the Rescue Hoist personnel retrieval thru the floor hatch as well as thru the rear door. In 1968 he transferred to the CH-46 Drive Systems Group where he supported design and sustaining engineering efforts of the CH-46 helicopter transmissions and shafting until his departure from the Boeing Company in 1970. In 1970 Steve accepted a Design Engineer position with General Technical Services located in Upper Darby, PA. While there he was responsible for all mechanical aspects of a space lab bound Biological Experiment “Arabidopsis” project sponsored by the University of Pennsylvania. This project involved designing and overseeing construction of a self-contained unit that would house a total of twelve (12) Arabidopsis plant seeds in their own individual environment. The seeds were contained in leak proof “test tubes”. The germination of all plants was started simultaneously and allowed to grow under “Grow Lux” lamps. The life span of the plant is approximately 24 hours from germination to extinction. During the experiment, the “life” of each plant would be terminated and fixed in time during different stages of the plants life, so that effects of weightlessness could be studied once the project returned to earth. The program required that each plant be photographed from the front and from the side every 10 minutes for the duration of the experiment which was to last approximately 24 hours. The unit also contained all necessary electronics and temperature control system. In 1973 Steve returned to the Boeing Company where he remained until his retirement. He resumed his position in the CH-46 Drive Systems Group and was fully engaged in the U.S. Navy Service Life Extension Program (SLEP). This program involved design and fabrication of new Accessory Gear Box (AGB) and Improved Engine Drive Shafting which supported a new torque meter system. Steve was intimately involved in the design, detail drawing creation, manufacturing and bench testing of these new components as well as client program reviews. Throughout the subsequent years, Steve was involved in many important projects such as UTTAS Program drive system, Model 360 Program drive system, CH-47C Program drive system, Model 234 Program drive system, CH-47D Modernization Program drive system, Osprey wing stow mechanism, RAH Program drive system, F-22 Fighter Airframe Mounted Accessory Drive (AMAD) and finally CH-46 DCU Program. Steve has vast experience in the field of system and component design and detail dimensioning using the GD&T methods. He has employed various CAD systems such as CADAM, CATIA and CAD-PACK and some AUTOCAD. In his earlier career days he use to create the drawings the old fashion way…by hand, on Velum or Mylar film using a pencil…what a novel way. As Staff Engineer, Steve directly interfaced with part suppliers by providing resolutions to problems and overseeing manufacturing progress.

Steve attended many transmission design related courses sponsored by Boeing, some of which are
listed below:
A. STATICS AND DYNAMICS FOR ENGINEERING TECHNICIANS (20 Hours)

  1. Boeing Vertol Company, Philadelphia, PA 1975
    B. BASIC GEAR AND SPLINE DESIGN (32 Hours)
  2. Boeing Vertol Company, Philadelphia, PA 1980
    C. Fundamentals of Gear Design (24 Hours)
  3. Boeing Vertol Company, Philadelphia, PA, October 1983
  4. Boeing Vertol Company, Philadelphia, PA January 1986
  5. Boeing Defense & Space Group, Helicopters Div., Philadelphia, PA, October 1994
    D. DRIVE SYSTEM DESIGN (12 Hours)
  6. The Boeing Training Center, Philadelphia, PA, June 1984
    E. Fundamentals of Gear Design Expanded (3 day sessions)
  7. The Boeing Company, Philadelphia, PA PART I (modified format), June 2000
  8. The Boeing Company, Philadelphia, PA PART II (modified format), June 2000
    In addition to his responsibilities at Boeing, Steve has served as a Senior Drives Engineer for the Drive Systems Technology, Inc. since 1973. In this capacity, Steve performs gearbox design functions as well as client’s drawing reviews prior to placement of orders. He also performs field gearbox failure investigations. Steve also travels to gear manufacturer facilities to witness various Non Destructive Examination inspections on behalf of DST Inc. clients.
    In addition, Steve reviewed and provided editorial comments for Mr. Drago’s book, “Fundamentals of Gear Design” published by Butterworth Publishers. Steve has co-authored three technical papers which have been presented at the Mill Gearing Technology Symposium, American Gear Manufacturers Association Fall Technical Meeting and Association of Iron & Steel Technology AISTech Technical Meeting.

PUBLICATION LIST

  1. 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
  2. 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
  3. 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

SEMINARS PRESENTED
Gearbox System Design – The Rest of the Story…Everything but the Gears and Bearings! – (24 Hours)

  1. American Gear Manufacturers Association, Ft. Worth, TX, May 2009
  2. American Gear Manufacturers Association, Concordville, PA, April 2010
  3. Pacific Rim Engineered Products, Surrey, BC, Canada, July 2010 (Special 36 hour presentation with additional drawing & design review session added)
  4. American Gear Manufacturers Association, Clearwater Beach, FL, December 2011
  5. American Gear Manufacturers Association, Clearwater Beach, FL, June 2012
  6. American Axle and Machine, Detroit, MI September 2012
  7. American Gear Manufacturers Association, Baltimore, MD March 2013
  8. American Axle and Machine, Detroit, MI May 2013
  9. American Gear Manufacturers Association, Clearwater Beach, FL, October 2013
  10. American Gear Manufacturers Association, Clearwater Beach, FL, May 2014
  11. American Gear Manufacturers Association, Clearwater Beach, FL May 2015
  12. American Gear Manufacturers Association, Clearwater Beach, FL May 2016
  13. American Gear Manufacturers Association, Clearwater Beach, FL, May 2017
  14. American Gear Manufacturers Association, Las Vegas, NV, February 2018



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