Re: [Paddlewise] bulging and burping

In a message dated 12/17/99 6:07:46 AM Pacific Standard Time, 
Bhansen97_at_aol.com writes:

> I don't think I've ever 
>  seen water leak into a compartment as a result of VCP or KajakSport hatch 
>  covers sucking in or bulging, so the accounts of this happening have been 
of 
> interest to me. 


I have.  I reproduced this effect some years ago when someone complained of 
water leakage in the rear of a VCP boat.  The round front hatch did not leak, 
but the oval rear hatch did.  I set the boat out in the sun and let it heat 
up, poured water into the channel around the bade of the covers, then cooled 
the boat with a combination of shade and water from the garden hose.  A very 
little water was sucked through the long sides of the oval hatch.  I'm don't 
recall, but I think it only happened when the hatch cover was fully sealed 
onto the opening rim, but not fully pressed down into the deck recess 
(double-sealed).

 
>  For sure I've never seen a hatch cover pop off or completely  
>  implode from this sort of thing.

I've never seen this, but there was a mention of it having happened to 
someone in a letter to one of the paddling magazines once.  The negative 
pressure can definitely make it much harder to remove the covers though.

Harold
***************************************************************************
PaddleWise Paddling Mailing List - All postings copyright the author and not
to be reproduced outside PaddleWise without author's permission
Submissions:     paddlewise_at_lists.intelenet.net
Subscriptions:   paddlewise-request_at_lists.intelenet.net
Website:         http://www.paddlewise.net/
***************************************************************************