Leak test
Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=755
Printed Date: 16 Aug 25 at 12:15am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Leak test
Posted By: ssailor
Subject: Leak test
Date Posted: 07 Jun 05 at 8:47pm
|
Does anyone have any idea what it means if a boat takes on water but
when it come to unscrewing the bungs after sailing you can hear the air
escape? to me it suggests its air tight!
------------- Any one in need of quality carbon fibre work (tillers etc) at decent prices! Int 14 Gbr 1244 'Nucking Futs' The New Port rule!!. |
Replies:
Posted By: Peter Rhodes
Date Posted: 07 Jun 05 at 8:56pm
could be the matterial soaking up water (nothing is totally inpermeable) or even the water in the cockpit!!! ------------- |
Posted By: Granite
Date Posted: 07 Jun 05 at 9:24pm
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Look for a pin hole below the waterline especialy if your boat has no
breather hole, the air in the hull contracts on the cold water and you
can get quite a negatave pressure to suck water in
------------- If it doesn't break it's too heavy; if it does it wasn't built right |
Posted By: sailor.jon
Date Posted: 07 Jun 05 at 10:02pm
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hen it come to unscrewing the bungs after sailing you can hear the air escaping this shud mean the hull is water tight or as near as dam it ------------- Jon Vortex 1169 http://www.yorkshiredales.sc/ - Yorkshire Dales Sailing Club |
Posted By: Scooby_simon
Date Posted: 07 Jun 05 at 10:51pm
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Most prolly the cause, when you then get on to the land, the boat heats up and QED + pressure ------------- Wanna learn to Ski - PM me.. |
Posted By: redback
Date Posted: 07 Jun 05 at 11:18pm
| You've got to remember the hull panels flex in and out as you hit the waves and so some of the time the pressure is less inside than out. A tiny leak will be alternatively sucking and blowing. If there is water around the leak then water will get sucked in but run to the lowest point inside so that air get expelled on the next blow. You then lift the boat out of the water and the air inside warms and expands. If you then open the bung you release that pressure but find a small amount of water in the hull. Its common and not to be worried about - just make sure you sponge it out, especially if its a wooden hull and especially if its likely to freeze overnight. |
Posted By: MikeBz
Date Posted: 08 Jun 05 at 9:00am
| I've had several boats which "whoosh" when you remove bungs or hatches but still take on water. Never got to the bottom of it though. |
Posted By: ssailor
Date Posted: 08 Jun 05 at 3:03pm
Cheers everyone whos put their point in  ,
weve got a feelin its where the spaceframe goes through the hull at one
point, once sealed hopefully itll wont leak!! we had noticed that the
boat only take the water in when its on its side , if we race and dont
capsize it doesnt leak!
------------- Any one in need of quality carbon fibre work (tillers etc) at decent prices! Int 14 Gbr 1244 'Nucking Futs' The New Port rule!!. |