Peacekeeper Rail Garrison Test of LCC Launch Car, EMS-2

Tests were performed on the Peacekeeper Rail Garrison Launch Control Car (LCC), EMS-2 according to specifications in Chapter XI of the Association o( American Railroads (AAR) Manual of Standards and Recommended Practices. The tests included vehicle characterization, service worthiness, and track worthiness. These tests address vehicle safety performance for freight equipment. The primary measurement of safety as described in Chapter XI is the ratio of lateral to vertical wheel force (L/V ratio). No examination of ride comfort is addressed. The LCC encountered high L/V's in the bunched spiral and standard spiral. The LCC performed within the Chapter XI 95th percentile; however, several high short duration L/V's did occur and the car was not tested at speeds above balance in sharp curves at the direction of the Air Force. The LCC also encountered high L/V's on the Dynamic Curving Test. The LCC became unstable above 55 mph, but hunting was not sustained as defined by Chapter XI. Vehicle motions at 55 mph are likely to be a source of passenger discomfort. The LCC performed satisfactorily in the Pitch and Bounce Test and the Twist and Roll Test. The LCC also performed well in the Yaw and Sway Test. Post-test modeling should be performed to examine car performance with possible design changes.

  • Record URL:
  • Corporate Authors:

    Association of American Railroads

    Transportation Test Center, P.O. Box 11130
    Pueblo, CO  United States  81001

    Federal Railroad Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Martin, Robert
  • Publication Date: 1991-9


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: 212p

Subject/Index Terms

Filing Info

  • Accession Number: 01666428
  • Record Type: Publication
  • Report/Paper Numbers: DOT/FRA/ORD-92/19
  • Contract Numbers: DTFR53-82-C-00282, Task Order 40
  • Files: TRIS, ATRI, USDOT
  • Created Date: Mar 12 2018 2:08PM