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Cyclist hospitalised



 
 
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  #11  
Old May 6th 15, 09:49 AM posted to uk.rec.cycling
The Medway Handyman[_4_]
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Posts: 1,359
Default Cyclist hospitalised

On 04/05/2015 20:37, Rob Morley wrote:
On Mon, 04 May 2015 19:49:48 +0100
Bod wrote:

I don't wear a helmet whilst cycling, but I accept it is more
sensible to wear one


Why? You believe the purveyors of overpriced plastic? You do realise
they're only rated to withstand the impact of toppling off a stationary
bike, and have been implicated in neck and rotational brain injuries?

"Helmets are tested on three anvils of different shapes:
The flat anvil is used with a 2 meter drop. The helmet and headform are
traveling at 14 mph at impact.
The hemispheric anvil, about the shape of a grapefruit, is used with a
1.2 meter drop. (The point load makes it a severe test.) The helmet and
headform are traveling 11 mph at impact."

A stationary bike traveling at 14 mph?


Perhaps some statistics from New York City might change your mind?

Statistics from New York City

New York issued a statement on their bicycle safety study including
these numbers:
Bicycle helmets may reduce the risk of death.

Almost three-quarters of fatal crashes (74%) involved a head injury.
Nearly all bicyclists who died (97%) were not wearing a helmet.
Helmet use among those bicyclists with serious injuries was low (13%),
but it was even lower among bicyclists killed (3%).


--
Dave - The Medway Handyman www.medwayhandyman.co.uk
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  #12  
Old May 6th 15, 07:00 PM posted to uk.rec.cycling
TMS320
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Posts: 3,875
Default Cyclist hospitalised

"The Medway Handyman" wrote
On 04/05/2015 20:37, Rob Morley wrote:

You do realise
they're only rated to withstand the impact of toppling off a stationary
bike, and have been implicated in neck and rotational brain injuries?


A stationary bike traveling at 14 mph?


If you're standing up, hammering something at head height and you drop the
hammer, what is the hammer's vertical speed when it hits your foot? Answer
13mph.

It is assumed that the head of someone falling off a bike can hit the ground
with similar vertical speed because it travels a similar vertical distance.
Horizontal speed (bicycle speed) does not alter the vertical impact speed.


 




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