sorry i have to differ to some of you comments.
i have contacted snell and have confirmed that the only difference between K2005 and SA2005 is that the SA must have a fireproof lining.
i was also asking about using a m2010 standard helmet for karting.
here are copies of the emails
myself to snell
hello there
i have been reading with interest the various standards that you experiment helmets to. i am particularly interested in the helmet standards being used in racing cars and motorcycles.
i am asking for information as i am a member of the Motor Sports Association of Great Britain and i am interested in your standards.
from my understanding there are two standards used in automotive racing, these being SA2005 and K2005. after reading your guidance on your website, the only difference between these two standards is that the SA2005 standard test the flame retardance of the helmet. would i be correct in thinking that the only difference between the K2005 and SA2005 standards in the resistance to flame?
i also have been reading your guidance on the M2010 Standard for motorcycle helmets. from what i have read the M2010 Standard does not test for resistance to flame. also the helmet require a greater field of vision compare to automotive standards.
i would like to now talk about the differences and similarities between the M2010 and the K2005 standards. from what i have read the main difference is the require field of vision is greater in a M2010 standard helmet. could this greater field of vision be detrimental to use if used for kart racing applications. also in your guidance you state that each standard is tested to the conditions that could be expected for the helmets intended use. could you explain the differences in testing helmets for the M2010 and K2005 standard.
if there are further differences to the M2010 and K2005 standards i would be very grateful if you would you be able to elaborate on further differences between these standards. also could you explain the similarities between the standards.
from this then, in the foundations view could a M2010 standard helmet be accepted in conjuntion with a K2005 standard helmet and both be used in kart racing. i also understand that my racing association must authorize the use of the M2010 standard before a helmet can be used in racing conditions.
thank you very much for your time
Adrian Criddle
snell reply
Dear Mr. Criddle,
Thank you for your email, and I apologize for the late reply. You wrote:
would i be correct in thinking that the only difference between the K2005 and SA2005 standards in the resistance to flame? Yes, that is essentially the only difference between K98 and SA2005. (SA2005 has a slightly lower front test line)
M2010 Standard does not test for resistance to flame. also the helmet require a greater field of vision compare to automotive standards. Yes, the M standards require the larger field of view, and only the SA helmets require flame resistance.
could you explain the differences in testing helmets for the M2010 and K2005 standard. The differences are too lengthly for an email discussion. The move to M2010 and SA2010 was in response to recent anthropometric measurements of the human head. Thus, we went from a constant 5kg drop mass to a variable mass impact testing approach. The new requirements have forced some redesigns of current head gear, particularly in the smaller sizes. Snell M2010 and SA2010 helmets may also be able to meet the European demands in ECE 22 05. For the first time in many years, manufacturers may be able to build the same helmets for distribution throughout the United States and Europe. The K2005/SA2005 standards are still excellent head protection but will likely not meet the "softer liner" considerations inhearent in passing ECE 22 05. Conversely, ECE 22 05 certified helmets are not able to pass M2005 or SA2005.
could a M2010 standard helmet be accepted in conjuntion with a K2005 standard helmet and both be used in kart racing. The M standard(s) may have too wide a field of view for optimum kart racing, but from an impact standpoint both helmets provide excellent head protection.
Gib Brown
Lab Manager
Snell Memorial Foundation
cheers
adey
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helmet sticker? by 'FullCanRacer' (20 Aug 2009 @ 10:47)
