The objective of the project was to investigate the feasibility of performing motorcycle safety helmet compliance tests to FMVSS 218 with three sizes of test headforms (A, B and D) in addition to the size C headform currently in use. The investigation covered the following: (1) Vertical and horizontal cross-sections of the A, B and D size headforms were plotted in a cartesian coordinate system to define the geometry of these headforms and to compare them with scaled data for the Z90.1 C size headform. (2) A DOT size C headform was compared to the Z90.1 C headform by performing standard DOT FMVSS 218 impact tests, using the DOT C headform on helmet models which had been previously tested using the Z90 headform. A resonance search for the impact apparatus with the DOT C size headform mounted was also performed. (3) The A, B and D headforms were balanced and impact tests were performed using these headforms with both fiberglass and polycarbonate helmet models. The test models were chosen on the basis of fit to the headforms. A resonance search was performed for the A, B and D headforms as mounted on the monorail drop test system. (4) Computer plots of vertical and horizontal cross-sections of the Z90 size C headform were made to better define this headform's geometry. (5) A second set of headforms, sizes A, B, C and D were balanced and resonance searches were performed on these headforms as mounted on the monorail drop test system. On the basis of the data obtained from items 1 through 5 above, an analysis of results and recommendations concerning the adequacy of the A, B and D headforms for FMVSS 218 compliance testing is given.

  • Supplemental Notes:
    • See also reported dated November 74, PB-244859, and Volume 2 dated June 78, PB-289042.
  • Corporate Authors:

    Southwest Research Institute

    6220 Culebra Road, P.O. Drawer 28510
    San Antonio, TX  United States  78228-0510

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bessey, R L
  • Publication Date: 1978-6

Media Info

  • Pagination: 54 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00190526
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT-HS-803-611 Final Rpt.
  • Contract Numbers: DOT-HS-6-01395
  • Files: NTIS, TRIS, USDOT
  • Created Date: Mar 14 1979 12:00AM