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From: Donna Ferron <FerronD_at_sanchez.com>
subject: [Paddlewise] Rescue Helmets
Date: Mon, 25 Jan 1999 14:32:40 -0500
Can rappelling helmets be used and provide the same amount of protection as
whitewater helmets? My rescue team wants to use various types of helmets and
I had an answer for those who wanted to use bike helmets.  I'm unfamiliar
with the construction of rappelling helmets, however.  Thanks very much!

Donna


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From: Product Information Department <pid_at_mec.ca>
subject: Re: [Paddlewise] Rescue Helmets
Date: Mon, 25 Jan 1999 12:02:34 -0800
At 02:32 PM 1/25/99 -0500, you wrote:
>Can rappelling helmets be used and provide the same amount of protection as
>whitewater helmets? My rescue team wants to use various types of helmets and
>I had an answer for those who wanted to use bike helmets.  I'm unfamiliar
>with the construction of rappelling helmets, however.  Thanks very much!
>
>Donna

Hi Donna,
I have far more experience paddling than climbing, but it seems to me you
should use a helmet designed for the particular activity. Climbing helmets
are often engineered contemplating a heavy impact from above (dislodged
rock), while the impacts to a paddler may come from other directions. The
other thing you need to consider is whether the helmet has enough slots to
allow water to "vent" in the event of an impact, thus dissipating the
transmission of shock via the water. This is a particular concern for your
eardrums, which could be broken if you were wearing, say a motorcycle
helmet and hit a rock while upside down in water. Air and water behave
quite differently under sudden pressure.
Philip T.
N49°16' W123°08' 
"The opinions expressed in this posting are not necessarily those of my
employer, or indeed, of any sentient being."
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From: Donna Ferron <FerronD_at_sanchez.com>
subject: RE: [Paddlewise] Rescue Helmets
Date: Mon, 25 Jan 1999 15:16:04 -0500
Thanks.  My dilemma has been that I haven't been able to offer a better
explanation other than "That's what I was told in all of the rescue courses
I took" or "That's what I've read."  When they ask me, I want to be able to
say why they shouldn't (or won't be allowed to on the team) use other
helmets.  

Donna


> -----Original Message-----
> From:	pid_at_mec.ca [SMTP:pid_at_mec.ca]
> Sent:	Monday, January 25, 1999 3:03 PM
> To:	Donna Ferron
> Cc:	paddlewise_at_lists.intelenet.net
> Subject:	Re: [Paddlewise] Rescue Helmets
> 
> At 02:32 PM 1/25/99 -0500, you wrote:
> >Can rappelling helmets be used and provide the same amount of protection
> as
> >whitewater helmets? My rescue team wants to use various types of helmets
> and
> >I had an answer for those who wanted to use bike helmets.  I'm unfamiliar
> >with the construction of rappelling helmets, however.  Thanks very much!
> >
> >Donna
> 
> Hi Donna,
> I have far more experience paddling than climbing, but it seems to me you
> should use a helmet designed for the particular activity. Climbing helmets
> are often engineered contemplating a heavy impact from above (dislodged
> rock), while the impacts to a paddler may come from other directions. The
> other thing you need to consider is whether the helmet has enough slots to
> allow water to "vent" in the event of an impact, thus dissipating the
> transmission of shock via the water. This is a particular concern for your
> eardrums, which could be broken if you were wearing, say a motorcycle
> helmet and hit a rock while upside down in water. Air and water behave
> quite differently under sudden pressure.
> Philip T.
> N49°16' W123°08' 
> "The opinions expressed in this posting are not necessarily those of my
> employer, or indeed, of any sentient being."
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From: Product Information Department <pid_at_mec.ca>
subject: RE: [Paddlewise] Rescue Helmets
Date: Mon, 25 Jan 1999 13:33:06 -0800
From: Michael Daly <mikedaly_at_interlog.com>
subject: Re: [Paddlewise] Rescue Helmets
Date: Mon, 25 Jan 1999 16:14:26 -0500
Donna Ferron wrote:

> Can rappelling helmets be used and provide the same amount of protection as
> whitewater helmets? My rescue team wants to use various types of helmets and
> I had an answer for those who wanted to use bike helmets.  I'm unfamiliar
> with the construction of rappelling helmets, however.  Thanks very much!

Philip T's points are valid. Another related thing I would point out is that rappelling
helmets that I've seen use web suspension while most (but not all) WW helmets
use foam.  The advantage of foam is that they reduce the amount of water in the
helmet when you surface.  There's nothing like finishing a roll in white water and
having a helmet full of water cascade over your face when you finally surface
gasping for breath.  Refreshing, blinding and choking.

Mike





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From: Rob Gendreau <gendreau_at_ccnet.com>
subject: RE: [Paddlewise] Rescue Helmets
Date: Wed, 27 Jan 1999 20:59:40 -0800
Philip added:

>Now that I've had lunch and the blood sugar is level up again, I can think 
>of yet another compelling argument against climbing helmets for kayaks. 
>Without large drainage holes, you're going to be working against the 
>weight of a lot more water when you roll (or perhaps when you try to 
>roll). If your head is coming out of the water last, as it should be, that 
>trapped water will basically be a huge suspended weight at the end of a 
>long lever (your neck and body) working against you.

I have tried this and Philip is absolutely correct. I once used my Joe 
Brown climbing helmet WW paddling. It's like a lot of climbing helmets, 
fairly full coverage with no vents. It acted as a cranial sea anchor when 
I came around to roll. Not only did the thing almost pull my head off, it 
did do the water-dumping thing. Not advised. Some more recently 
manufactured helmets, like the Petzel, might work: they've got more vents 
and fit tighter. But you'd be pressing your luck.


Rob Gendreau
Oakland, California
gendreau_at_ccnet.com

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From: <Bhansen97_at_aol.com>
subject: Re: [Paddlewise] Rescue Helmets
Date: Thu, 28 Jan 1999 13:04:53 EST
Being ignorant at the time (and I guess still ignorant now) I've used a Romer
hockey helmet for years, starting out in whitewater and now for surf practice
when sea kayaking. I've never had trouble rolling with the helmet on - or at
least, never had trouble that I could ascribe to the helmet. Certainly, I've
been lucky enough not to experience the "sea anchor" effect that Rob Gendreau
experienced. I have no experience with climbing helmets, though, on or off the
water - Bill Hansen.
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