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From: merijn wijnen <merijn_at_music.demon.nl>
subject: [Paddlewise] clamping down hatches
Date: Thu, 7 Jun 2001 22:35:43 +0200
Hi all,

I have a stitch and glue kayak with hatches that do leak a little. This 
is partially due to insufficient sealing but also due to the fact that I 
can not clamp the hatches tightly onto the deck.
The clamping consists on 1" webbing and buckles like those used 
for back packs. The friction between webbing and bucke is to hign 
to tighten it enough.
I once rented an Eddiline Raven (if I got the name right) that also 
used webbing, but in combination with an ingenious device to tighten 
the webbing. It was really simple, but I somehow can not remember 
how it worked. It was a kind of lever.
Is there somebody who can help me out? I want to make a few of 
those clamps myself, but my mind keeps wondering what was that 
simple trick. Bother. 

Any tips for making a really good seal between hatch and deck are 
also very welcome.

Happy paddling,

Merijn

******************************
Merijn Wijnen
Vinkenhofje 8
5613 CN Eindhoven
The Netherlands
Tel.: 040-2939991          (job: 040-2650539)
Fax:  same as tel., call before sending or try twice
E-mail: Home: merijn_at_music.demon.nl
        Job:  m.wijnen_at_ind.tno.nl
Web-site: http://www.music.demon.nl

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From: Alex Ferguson <a.ferguson_at_chem.canterbury.ac.nz>
subject: Re: [Paddlewise] clamping down hatches
Date: Fri, 08 Jun 2001 09:12:26 +1200
>I have a stitch and glue kayak with hatches that do leak a little. This
>is partially due to insufficient sealing but also due to the fact that I
>can not clamp the hatches tightly onto the deck.
>
>Any tips for making a really good seal between hatch and deck are
>also very welcome.

We all (or most of the S&G builders in this town) build hatches with rims 
so that we can fit neoprene covers (same as cockpits). Over this you can 
fit a hard shell cover, again with a soft seal to press against the 
neoprene cover and give double sealing. A correctly fitted neoprene cover 
is usually enough however. If you do not fit an over-cover, a hard panel 
should go under the neoprene. A "quick & dirty" fix is a sheet of PVC 
suitably curved with a hot-air gun.

The rim, though standing above the deck, does give extra volume for gear.

Alex



Alex (Sandy) Ferguson
Chemistry Department
University of Canterbury
New Zealand


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From: Dave Kruger <dkruger_at_pacifier.com>
subject: Re: [Paddlewise] clamping down hatches
Date: Thu, 07 Jun 2001 15:15:08 -0700
merijn wijnen wrote:
> 
> Hi all,
> 
> I have a stitch and glue kayak with hatches that do leak a little. This
> is partially due to insufficient sealing but also due to the fact that I
> can not clamp the hatches tightly onto the deck.
> The clamping consists on 1" webbing and buckles like those used
> for back packs. The friction between webbing and bucke is to hign
> to tighten it enough.
> I once rented an Eddiline Raven (if I got the name right) that also
> used webbing, but in combination with an ingenious device to tighten
> the webbing. It was really simple, but I somehow can not remember
> how it worked. It was a kind of lever.

Know the problem.  Two suggestions:

1. Fasten a half-round chunk of wood (nominal diameter about 2 cm), flat side
against the hatch, near the edge of the hatch where each strap piece crosses
the edge.  This will concentrate the compression of the straps on the neoprene
gasket seal, and may be enough to solve the problem.

2. The Eddyline-style lock-buckles are good (I have two yaks which use them),
but the ones which Current Designs uses are better.  CD may sell them, but I
know Pygmy (http://www.pygmyboats.com/) will sell them, because they use the CD
style for all the hatch kits of the type you must have.  Pygmy's are hard
marine alloy aluminum, I think, and I bet they'd sell you the complete kit,
straps, buckles, etc.

-- 
Dave Kruger
Astoria, OR
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