Sounds a little like the drama after Princess Di crashed. Mercedes said "We want a rigid box!" Everyone else said "Crumple Zones FTW!" Not sure anyone came out on top.
Rigid box or not, the only lesson worth learning from Di's crash is to buckle your fucking seat belt.
The controversy about the Snell motorcycle helmet standard dates back to 2005, when Dexter Ford of
Motorcyclist Magazine wrote an article, "Blowing the Lid Off", which was critical of Snell:
There's a fundamental debate raging in the motorcycle helmet industry. In a fiberglass-reinforced, expanded-polystyrene nutshell, it's a debate about how strong and how stiff a helmet should be to provide the best possible protection.
Why the debate? Because if a helmet is too stiff it can be less able to prevent brain injury in the kinds of crashes you're most likely to have. And if it's too soft, it might not protect you in a violent, high-energy crash. What's just right? Well, that's why it's called a debate. If you knew what your head was going to hit and how hard, you could choose the perfect helmet for that crash. But crashes are accidents. So you have to guess.
Motorcyclist has apparently disappeared the article (it was not well received by advertisers), but it is available
here as a PDF, courtesy of SMARTER USA, a private motorcycle safety advocacy group. Visit their
home page and spend some time wandering around. They're good people and have collected some great material.
Harry Hurt had some things to say about helmet standards in a 2005
Motorcycle Consumer News interview with Wendy Moon:
Hurt insists that there is no reason the vaunted Snell certification should be preferred by motorcyclists over the more common DOT certification, though Snell uses more severe test impacts. The Snell criteria, he says, "have never been based on a rational evaluation of accident events... there are completely artificial, unsubstantiated elements in their standards."
The interview is available
here as a PDF at
All Things (Safety Oriented) Motorcycle. It is the only place I know of that has preserved Moon's work from the now-defunct MCN. If you visit the site, I recommend that you check out the Safety Tips section, and you might also find useful information in the Forums.