Comments:
[log in] or [register] to leave a comment for this document file.
Go to: all document files
19-Jan-2014 All-female flat-track roller derby league in Chicago, IL [9456]
• In order to pass the CPSC test a helmet must reduce a 1000 G energy pulse to under 300 G's. A 1000 G energy pulse is equivalent to falling roughly 7 ft. to the ground or a 14 mph impact into a flat surface.
Document file preview see url detail
Auto preview is off. Preview document, or open document in new window.