JNR
New Member
Physics teacher. If the helmet breaks apart upon impact, it will act simirlarly to an air bag, or a crumple zone in a car. They are both good things to have in crashes.
I was interested to read one of the earlier posts that talked about problems caused by crashing in traditional-shaped lids (twisting etc). I must admit that I'd never considered the idea that there might actually be hazards associated with wearing one. All the same, I always wear one on or off road. The off-road one is a bit uncomfortable (Met Parachute with detachable chin bar) but makes me feel safer. I've seen my riding buddy cock up a jump that we do pretty much every week, and he has - quite literally - SNAPPED three helmets. I think he may have a skater style one now. I wouldn't like to imagine what the consequences would have been if the first thing to hit the dirt were his skull. When I'm on the road I wear my other lid and I don't find it uncomfortable in the least, though I often wonder how much protection it really offers, I'd still rather have it on than not. There are one or two experienced riders in our road group who don't wear helmets - that's up to them and I wouldn't presume to say anything. However, a large majority of the riders prefer to wear them.
I wouldn't dream of riding my motorbike without a helmet and all the rest of the gear, even if I knew I wouldn't exceed 30 (yeah, right!). OK, if I did ride without a lid I'd get nicked for it, but I still do not wish for the government to tell me that it's illegal to ride a motorbike without the leathers, boots and gloves. But when I think that I sometimes exceed 40mph on the bicycle wearing just Lycra, a polystyrene lid and some fingerless gloves, it makes me cringe to think what would happen if I crashed. And I skied hard for years before someone persuaded me to wear a crash helmet.
The post that Cunobulin posted about that poor child is indeed tragic, but I'm not going to walk around in a crash helmet every time it snows. I suppose it's just about deciding what level of risk there is in what you are doing, and what measures you are prepared to take to mitigate that risk.
Then again, when I was a lot younger and used to hang in a skate park, there was a kid called Barry the Radish. He would do the most death-defying stunts on the concrete half-pipes and bowls, including jumping an enormous stack of piled-up bikes on his BMX, whilst doing a 360 tail whip. He would just keep trying, getting more and more bruised and bloody until he had succeeded. Amazing tenacity and bike skill, but you don't get a nickname like "Radish" for nothing. I'm not sure whether he actually needed a helmet to protect anything in there!
Physics teacher. If the helmet breaks apart upon impact, it will act simirlarly to an air bag, or a crumple zone in a car. They are both good things to have in crashes.
. I must admit that I'd never considered the idea that there might actually be hazards associated with wearing one.
Not really, no, as the energy it absorbs in breaking is very little (think about it, you can snap polystyrene foam with your hands). If it works as it's supposed to it will crush, not just break apart.
I don't really want to get into this, but snapping polystyrene with your hands is very, very different from the forces it will experience during collision on someones head in a crash hat.
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Keep track of the energy.
I'm not sure 'beginners' is the right place for this, but you've made me think that some well reasoned technical research on helmet effectiveness by those willing to back up their arguments with rather more than opinion or anecdote would be really useful, and well within the scope & capability of this very widely knowedgeable forum. We could maybe organise some properly instumented experiments without pressure from commercial or political interests.
My own degree is in engineering, and I'm only too aware that much of the underlying science had to be skipped over rather lightly to meet the schedule. It was also some time ago, but at least the maths hasn't changed much, and I know there are others on this forum with a huge range of relevant technical knowledge and qualifications covering the science, engineering, medical aspects from both a practical and theoretical view.
So - could we contribute anything worthwhile?
I don't really want to get into this, but snapping polystyrene with your hands is very, very different from the forces it will experience during collision on someones head in a crash hat.
Keep track of the energy.
I'm not sure 'beginners' is the right place for this, but you've made me think that some well reasoned technical research on helmet effectiveness by those willing to back up their arguments with rather more than opinion or anecdote would be really useful, and well within the scope & capability of this very widely knowedgeable forum. We could maybe organise some properly instumented experiments without pressure from commercial or political interests.
My own degree is in engineering, and I'm only too aware that much of the underlying science had to be skipped over rather lightly to meet the schedule. It was also some time ago, but at least the maths hasn't changed much, and I know there are others on this forum with a huge range of relevant technical knowledge and qualifications covering the science, engineering, medical aspects from both a practical and theoretical view.
So - could we contribute anything worthwhile?
Would you wear a helmet if you were riding a motorbike? You may be a great cyclist, but there are some shocking drivers out there.