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[QUOTE 2876296, member: 45"]Sorry, I thought I was being clear. Obviously not.
This is only a small point, but I feel it worthwhile to mention, but as with the last time I did it is turned in to a couple of pages of banter....
I could trip up a kerb while walking at 3mph. If there's a wall in front of the kerb the lever effect (if that's what it's called) could result in my head hitting the wall at a speed in excess of 3mph as I fell. Now, I could come off my bike at 30mph, scrub off most of my speed by sliding, and then make head contact with a kerb at a relatively low speed. I may end up with severe road rash though, as of course there's going to be more energy around at that speed as you say.
So what I'm saying is that the speed you're travelling at when you go into an incident does not link to the speed that your head might hit something (if it does hit anything). So when someone makes a claim that an incident when riding at say 30mph is outside of the design parameters of a cycle helmet it's not an accurate statement, because usually the person is relating the speed that the helmet hits the anvil in a test with what's showing on your Cateye.[/quote]
You might hit your head at a greater velocity but it most probably it would be slower. However, that does not detract from the principle that the probability that you will suffer an impact, or series of impacts that exceed the helmet's capacity of energy absorption scale with with the square of the speed you are travelling at.
But this really is a bit besides the point, isn't it? And certainly not worth a whole two pages of banter! (Sighs of relief all round ) What is important is this impression that cycling is some unusual activity with high risks. I don't think that educating people on statistics is the way forward. There are no shortage of people who're still scared of flying, despite all the statistics that abound showing that it's the safest way to travel. Instead we need to encourage the view that cycling is a normal everyday activity rather than some sporting activity done only by athletes who need special equipment (and that includes the hi-viz and helmets). After all, you don't see people strap on protective equipment for the everyday activity of crossing busy roads.
This is only a small point, but I feel it worthwhile to mention, but as with the last time I did it is turned in to a couple of pages of banter....
I could trip up a kerb while walking at 3mph. If there's a wall in front of the kerb the lever effect (if that's what it's called) could result in my head hitting the wall at a speed in excess of 3mph as I fell. Now, I could come off my bike at 30mph, scrub off most of my speed by sliding, and then make head contact with a kerb at a relatively low speed. I may end up with severe road rash though, as of course there's going to be more energy around at that speed as you say.
So what I'm saying is that the speed you're travelling at when you go into an incident does not link to the speed that your head might hit something (if it does hit anything). So when someone makes a claim that an incident when riding at say 30mph is outside of the design parameters of a cycle helmet it's not an accurate statement, because usually the person is relating the speed that the helmet hits the anvil in a test with what's showing on your Cateye.[/quote]
You might hit your head at a greater velocity but it most probably it would be slower. However, that does not detract from the principle that the probability that you will suffer an impact, or series of impacts that exceed the helmet's capacity of energy absorption scale with with the square of the speed you are travelling at.
But this really is a bit besides the point, isn't it? And certainly not worth a whole two pages of banter! (Sighs of relief all round ) What is important is this impression that cycling is some unusual activity with high risks. I don't think that educating people on statistics is the way forward. There are no shortage of people who're still scared of flying, despite all the statistics that abound showing that it's the safest way to travel. Instead we need to encourage the view that cycling is a normal everyday activity rather than some sporting activity done only by athletes who need special equipment (and that includes the hi-viz and helmets). After all, you don't see people strap on protective equipment for the everyday activity of crossing busy roads.