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From: Kenneth Cooperstein <cprstnc1_at_optonline.net>
subject: [Paddlewise] Durability Testing -- "Boof Number"
Date: Fri, 07 Jan 2000 06:55:39 -0500
It sounds to me that what some people want is a new measure of sea kayak
durability, most accurately called a "boof number."  Whitewater kayakers
call a horizontal launch off a rock or waterfall, followed by a drop and
horizontal impact a "boof" -- because of the sound it makes.

Manufacturers could simply advise buyers of the boat's Boof Number (in
feet of survivable boof) and those interested in such things could act
accordingly.  In passing, I note that if my sea kayaks were as hefty as
my whitewater kayak, they would weigh 150 lbs. and require way too much
effort to paddle, especially with a load.

Ken Cooperstein


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From: Patrick Maun <pmaun_at_bitstream.net>
subject: Re: [Paddlewise] Durability Testing -- "Boof Number"
Date: Fri, 7 Jan 2000 12:30:25 -0600
At 6:55 AM -0500 1/7/00, Kenneth Cooperstein wrote:
>[SNIP]
>Manufacturers could simply advise buyers of the boat's Boof Number (in
>feet of survivable boof) and those interested in such things could act
>accordingly.  In passing, I note that if my sea kayaks were as hefty as
>my whitewater kayak, they would weigh 150 lbs. and require way too much
>effort to paddle, especially with a load.

The problem with boofing a fiberglass boat is that gel-coat is not 
meant to flex that much. In fact, I have seen a couple manufactures 
who were delving into kevlar boats with lousy results because of 
cracking gel coat (kevlar in a light layup flexes more I believe, 
someone correct me if I'm wrong). Drop a glass boat and you're going 
to get cracks. Part of the appeal of glass is its stiffness. Now a 
baidarka...

My main concern with durability is to avoid getting holes in the hull 
(which I have done). I currently paddle a Current Designs GTS which I 
love, but wish it had a heavier layup. Paddling in Lake Superior nice 
sandy landings are few and far between. Surf and storm landings and 
launches on rocky can wear a boats gel-coat down pretty quickly. I 
will most likely add a keel strip this spring.

-Patrick
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