This is the fifty ninth of the Foundation's newsletters to the helmet manufacturing industry. The fifty eighth was sent out in March, 2012. Comments and items for inclusion in subsequent issues are invited.PDF version
The Foundation’s annual manufacturers meeting will be held the morning of February 14, 2013, in conjunction with the Indianapolis PowerSports Expo. Snell certified manufacturers are welcome to attend. Other interested parties may contact Ed Becker or Ms. Hong Zhang and request an invitation. The precise time and location will be emailed to invitees later.
Drafts for Snell M2015 and SA/K2015 are in preparation and are expected to be ready for distribution to Snell certified manufacturers and other interested parties for comment shortly after the new year.
We’ve gotten some questions on the thinking behind the different impact severities and criteria set for Snell certification and enforcement testing. The intent is to assure that uncertainties in test measurements do not interfere with the orderly administration of Snell programs. Once a model is certified, helmet units identical to those passing certification testing ought always to pass enforcement testing. A technical brief explaining the procedures has been posted on the Snell website.
The helmet swap program conducted jointly by the Snell Safety Education Center, the Livermore Police Department and the California Highway Patrol appears to have been a success. These organizations cooperated in a program funded by the California Office of Traffic Safety to trade Snell/DOT compliant motorcycle helmets for non-compliant headgear. The swaps were conducted at several different motorcycle venues and meetings; in all, 164 new, Snell/DOT compliant helmets were exchanged for non-compliant, obsolete or damaged headgear. There will be a follow-up survey to learn just what use is being made of these new helmets.
Snell has received several inquiries regarding similar helmet swap programs in other states. If it appears that the swap program actually results in the increased usage of effective motorcycle helmets, the effort will be worth repeating.
Ed Becker presented on motorcycle helmet standards at the recent IFZ conference held in conjunction with the Intermot motorcycle and accessories show in Cologne, Germany, last October. The gist of the presentation is that ECE 22-05 is inadequate. It demands less impact protective capability than the current US requirement, DOT, and the procedures allow “holes” in a helmet’s coverage in which the impact protection falls far short of even the low minimums that might be expected. Motorcyclists can and should wear better headgear. Becker’s paper and presentation are available on the Snell web site.
There has been much discussion of helmet performance in low severity impacts. Many in the industry think an advantage in injury reduction might be had by sacrificing some of a helmet’s high severity capability to increase shock attenuation in lower severity strikes.
Snell will conduct a series of tests to determine the response of a broad range of helmet models and types throughout a range of impact velocities. Although this effort will not answer the basic question of injury reduction, it may demonstrate the performance of current headgear and also establish whether a helmet’s low velocity performance might be inferred from tests conducted at higher velocities.
All the helmet samples in any single submission for Snell certification must be structurally identical. In particular, the shells, retention systems and liners must be exactly alike. In the case of Snell 2010 standards in which additional samples may be required for testing on the smallest appropriate head form, manufacturers are encouraged to configure these additional samples with thicker fit pads but the helmet shells, liners and retention systems must be identical to those of the other samples in the set. This includes liner density. For example, if the helmets incorporate EPS impact liners, the same EPS density must be used for all the samples in the set.
When submitting helmets for certification testing, please make sure that all the helmets are complete and in ready-for-use condition. All the samples should have all the necessary face shields, peaks (eye shades) and other accessories included with them. Lab managers may grant one-time exceptions to this policy but exceptions will be rare. If an exception s necessary, ask in advance, before sending samples.
Please direct any comments, suggestions or complaints about any aspect of the Snell programs or services to Ed Becker.
|Snell Memorial Foundation, Inc.|
|3628 Madison Avenue, Suite 11|
|North Highlands, CA 95660|
|Phone: 916-331-5073; Fax: 916-331-0359; Email: firstname.lastname@example.org|
|All Other:||Ed Beckeremail@example.com|
|4 Farnham Business Centre|
|Dogflud Way, Farnham|
|GU9 7UP UK|
|Contact:||Paul Walker, firstname.lastname@example.org|
|Phone:||+44 (0) 1252 714920|
|Fax:||+44 (0) 1252 737137|
Editor: Hong Zhang, Director of Education