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Old 03 April 2007, 18:01   #1
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Helmets

I know this sounds like i am doing it on the cheep but my brother in law as given me a new open faced crash helmet with a wrap around visor
My question is will it work on the rib
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Old 03 April 2007, 18:04   #2
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If you fall in at speed with the strap done up make sure the helmet can't 'bucket' and snap your neck.
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Old 04 April 2007, 05:18   #3
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I use one as a matter of choice in the depths of winter. We have a number of proper boating hemets for clients but they do not allow you to hear conversations unless an ear plug is taken out -and then the wind literally whistles thru and they are cold. Bike helmet is warm, I can hear everything and the visor is great. Coming back from february fishing trips I have my own micro climate in there-visor down, neck warmer up - very toastie. We never fasten the strap on any of them however and have cut the straps off my bike helmet.
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Old 04 April 2007, 11:26   #4
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If you fall in at speed with the strap done up make sure the helmet can't 'bucket' and snap your neck.
What is the documented evidence for this outside racing? I.e. risk in a 35 knt rib...
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Old 04 April 2007, 13:29   #5
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I just dont like wearing the strap anyway, and if ya leave it loose it rattles around and clatters on the helmet.
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Old 05 April 2007, 12:39   #6
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What is the documented evidence for this outside racing? I.e. risk in a 35 knt rib...
There's plenty. Ask the RNLI or a few other rescue services.

Certainly there's documented case history from South Africa and I seem to recall a case from Australia as well.

The theoretical speed required given the average weight of such a helmet, combined with the velocity of water to create a bucket effect is about 6 knots.
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Old 05 April 2007, 14:14   #7
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There's plenty. Ask the RNLI or a few other rescue services.

Certainly there's documented case history from South Africa and I seem to recall a case from Australia as well.

The theoretical speed required given the average weight of such a helmet, combined with the velocity of water to create a bucket effect is about 6 knots.
I still wonder if this is a bit of an urban myth - maybe Mythbusters should have a go at it?

Looking at it logically an open face should be fine - the visor will just rip open. A closed hemlet should be worse but there is a very small gap for the water to get in - most racers in open boats were closed helmets and they still seem to have their heads attached!!!
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Old 06 April 2007, 04:16   #8
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Depends what helmet/visor it is-visors don't usually go up past 90 degrees specifically to stop air doing the same thing at speed.
It's very unnerving and quite painful at times having a visor fly past horizontal at 100mph and catching the wind.

Simple test for how much 'bucketing' will hurt-chuck a kids bucket on a rope in at 30 knots and try and hold on. Imagine the same thing happening to your neck.

I don't think it's about how much water gets in/can get in but more about the lip of the helmet catching on the water at the point of impact. At speed water is more like a solid object.
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Old 06 April 2007, 05:07   #9
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does this apply to gecko helmets.
Also if the strap is not done up will it be ok or as ok as it can be.
To be honest i only want it when the weather is bad.
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Old 06 April 2007, 05:25   #10
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its all a matter of personal choice and personal risk assesment.
Other factors inslude will a non boating helmet foul the lifejacket if it inflates and push your head forward compromising the airway? And is the helmet heavy to possibly cause neck injury? All that is a matter of personal choice and risk evaluation so I would never say yes wear that or this - thats your choice. What i would say is that I use my non boating helmet, to keep my head warm and to carry the visor, and have been using fast small boats for more years than I care to remember all over the world-and I am still in one piece! (oo-er thats tempting fate isnt it!)
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