In 1976, the Urban Mass Transportation Administration established the present program--Study of Flywheel Energy Storage--to determine the practicality and viability of flywheel propulsion systems for urban mass transit vehicles. The study began with a review of the U.S. transit properties requirements, which showed that the most suitable vehicle for deployment of flywheel propulsion is the full-size transit bus. Several propulsion concepts were hypothesized and subjected to comparative analysis with present diesel buses, trolley coaches, and battery buses in regard to performance and life-cycle economics. This screening resulted in the establishment of the following basic concepts that can provide various types of high quality transit service: Pure flywheel propelled bus; Flywheel/diesel engine hybrid bus; Flywheel-augmented trolley coach; and Flywheel/battery hybrid bus. The design studies that were conducted for the four propulsion configurations showed a high degree of commonality of components among the four concepts. Final life-cycle cost analyses showed all four concepts to be in a competitive range with present transit vehicles. Plans were made for a Phase II development program that will result in the design, fabrication, and testing of all four propulsion configurations in full-size buses within 36 months. Volume 1 presentes the summary of the results of the Study of Flywheel Energy Storage. The study has shown the viability of flywheel-propelled buses, and a set of plans for successful deployment of these new vehicles has been prepared. The study recommends that the Phase II program leading to the development of prototype vehicles be promptly initiated. Volume 2 reviews, identifies, and defines the requirements for improved rubber-tired urban transit vehicles. It includes the quantification of three baseline vehicles: a 40-ft diesel bus, a trolley coach, and a battery bus. It discusses the requirement needs of 11 transit properties. Volume 3 describes the results of the system mechanization for the four flywheel propulsion configurations that scored highest in the screening: Pure flywheel drive; Flywheel/battery hybrid drive; Flywheel/diesel engine hybrid drive; and Flywheel-augmented trolley coach drive. Volume 4 describes the methodology developed to guide the life-cycle cost analysis of the flywheel propelled vehicles as compared with the three baseline vehicles. Volume 5 presents the major results of the tests performed on a 40-foot diesel bus and a trolley coach as related to the program methodology. It includes the test data from the 20-vehicle M.A.N. Electrobus demonstration program in Germany. Details of the tests, test data, and other test results are included in Appendixes A, B, and C of this report. /UMTA/

  • Supplemental Notes:
    • See also Vols. 2 through 5, NTIS PB-282653 through PB-282656 respectively, also available in set of 5 reports PC E14, PB-282651-SET.
  • Corporate Authors:

    AiResearch Manufacturing Company

    2525 West 190th Street
    Torrance, CA  United States  90509
  • Authors:
    • LAWSON, L J
    • Smith, A K
    • Davis, G D
  • Publication Date: 1977-9

Media Info

  • Pagination: 725 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00179869
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: UMTA-CA-06-0106-77-1Final Rpt.
  • Contract Numbers: DOT-UT-60097T
  • Files: NTIS, TRIS
  • Created Date: Oct 12 1981 12:00AM