Forums > Windsurfing General

Forgot to tighten the vent screw,

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Created by dring44 > 9 months ago, 6 Oct 2010
dring44
WA, 38 posts
6 Oct 2010 4:16PM
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Hey , so i screwed up,

i forgot to tighten up the little screw and now i presume there is a bit of water in my board, i left it out in the sun for a day and there was a little water that had seemed to 'rise' up to the vent screw. (evaporate in the board then condensate near the opening) however i was wondering if there is a surefire way to know how much is left or if theres any more inside?

cheers,

Darkplague
SA, 197 posts
6 Oct 2010 7:17PM
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I have done the same recently.
Just roll some paper towels/serviettes into a cigar type shape and shove them in the vent hole, this will act like a wick and suck the remaining water out.

Its best to leave the board in a dry/hot place like inside your house whilst its drying.
You will know its fully dry when the "wick" is dry. If the wick feels damp it is still wet inside the board

Pugwash
WA, 3861 posts
6 Oct 2010 4:50PM
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Place mouth over vent hole and suck. If water in mouth. Taste = yuck. Water = in board.

dring44
WA, 38 posts
6 Oct 2010 4:55PM
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Yea, thx

i have had a wick in it for the last few day left it out in the sun under a black sheet and it isn't damp anymore. however i have weighed the board and its about 1kg heavier than it should be, (8 instead of 7) but that might have something to to with the weights taken without bootstraps and a fin possibly..., either way i think its as close as it will get for now.

busterwa
3407 posts
6 Oct 2010 5:45PM
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I had a similar problem i ran into a sandbar a full speed (heading towards the sun) i cracked my finbox sheared front fin bolt , broke a harness line and nearly my face in ankle deep water
The board is a total write off and takes in water I still use it occasionally but the water is a problem and now i think there is so much water in it its starting to crack from expansion etc around the bolt holes for the rear straps. I constantly leeks thru the plug even when its tight.
After about half hours sailing it becomes almost waterlogged.

I just leave it out doors in the sun to dry out There is no point really loostening the bung because now and it weaps water from the mast slot. finbox top and bottom , both back straps and the 6 inches around the nose.

Board for sale ........ Used once lol

busterwa
3407 posts
6 Oct 2010 5:53PM
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Whats more funny is when i had a boat i left the bung out and we put it in the water tied it up I drove the car up and parked it and my mate went for a piss When we came back the back of the boat was underwater all the tackle boxes and fuel tank was floating ;-)
Infact i did heaps of dumb **** like that in my boat. i took of with the anchor down and didnt relize i turned around to see the rope and anchor bouncing about like 10 foot out of the water ;-) behind the boat

Hausey
NSW, 325 posts
6 Oct 2010 9:10PM
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Best way to get water out of a styro core board is to:

1. drill a hole at each end through all laminates into the core
2. spin the board on a device that turns the board horizontally - a bit like the old school garden sprinkler.... the centrifical force will remove the water if it is a low density core and recently waterlogged.....

desertyank
1214 posts
6 Oct 2010 6:19PM
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Hausey said...

Best way to get water out of a styro core board is to:

1. drill a hole at each end through all laminates into the core
2. spin the board on a device that turns the board horizontally - a bit like the old school garden sprinkler.... the centrifical force will remove the water if it is a low density core and recently waterlogged.....





Might be faster if You cut the board in half before You spin it

DrJ
ACT, 481 posts
6 Oct 2010 10:39PM
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Attach a vacuum pump, to vent plug whole, use a tube that will not collapse. The pump does not have to be very powerful a good fish tank pump would probably work. Place in warm place and leave for a while under constant vacuum ..... Voilà board dry again.

terminal
1421 posts
6 Oct 2010 8:35PM
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As soon as you realise, its a case of setting the board in a warm dry room with the board flat with the deck down.
You can check if its dry by putting cling film over the vent area and warming the area SLIGHTLY for a while with a hair dryer. then let it cool again and if there is condensation on the cling film, its still damp inside.

If you are in a humid area, cling film over the vent with some dessicant or salt inside it might help dry it out.

the skipper
QLD, 89 posts
6 Oct 2010 10:56PM
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The best way to rid yourself of a heavy board is on the Buy and Sell section of this site.

Mark _australia
WA, 16937 posts
6 Oct 2010 9:06PM
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DrJ said...

Attach a vacuum pump, to vent plug whole, use a tube that will not collapse. The pump does not have to be very powerful a good fish tank pump would probably work. Place in warm place and leave for a while under constant vacuum ..... Voilà board dry again.


but with a hole drilled in the tail to get some flow... and not when it is cool and raining outside (so u have warm and low humidity air flow)
.
Then plug hole in tail with knead it or similar epoxy putty, and repeat process with hole in the nose preferably.

Haircut
QLD, 6120 posts
7 Oct 2010 11:45AM
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many moons ago it was recommended to me to do the following after a leaky vent plug issue:

- during hot part of the day put board in hot sun to get the inside air to expand and push the water out, placed deck down with a tissue wick in vent plug

- before the day cools down or the board cools down, tighten vent plug back up so that moisture doesnt get drawn further into the board as the inside air shrinks

repeat till wick is dry

sboardcrazy
NSW, 5988 posts
7 Oct 2010 12:52PM
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busterwa said...

I had a similar problem i ran into a sandbar a full speed (heading towards the sun) i cracked my finbox sheared front fin bolt , broke a harness line and nearly my face in ankle deep water
The board is a total write off and takes in water I still use it occasionally but the water is a problem and now i think there is so much water in it its starting to crack from expansion etc around the bolt holes for the rear straps. I constantly leeks thru the plug even when its tight.
After about half hours sailing it becomes almost waterlogged.

I just leave it out doors in the sun to dry out There is no point really loostening the bung because now and it weaps water from the mast slot. finbox top and bottom , both back straps and the 6 inches around the nose.
Board for sale ........ Used once lol




No Thanxs..

sboardcrazy
NSW, 5988 posts
7 Oct 2010 12:53PM
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the skipper said...

The best way to rid yourself of a heavy board is on the Buy and Sell section of this site.


No chance if people read the forums..

barn
WA, 2848 posts
7 Oct 2010 10:53AM
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if it was salt water, the salt will destroy the foam causing unlamination... so u have to rinse the foam out several times. Its pretty easy only 3 simple steps.

1: stick a hose in the tail and dill anther hose in the nose.. then flush fresh water through the foam of the board..

2: ??

3: good as new.

jp747
1546 posts
7 Oct 2010 11:29AM
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DrJ said...

Attach a vacuum pump, to vent plug whole, use a tube that will not collapse. The pump does not have to be very powerful a good fish tank pump would probably work. Place in warm place and leave for a while under constant vacuum ..... Voilà board dry again.


just curious does the tube have to be air tight on the vent hole and bore a small hole somewhere else to suck in air at the same time???

FormulaNova
NSW, 5971 posts
7 Oct 2010 2:40PM
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I think the vacuum method is relying on the water evaporating at a lower pressure and temperature. If you have a hole in the board as well, you aren't going to get that lower pressure and you will be just drawing air through the board.

The boardlady again has a section somewhere on her site talking about the process of drying boards this way.

Ian K
NSW, 2479 posts
7 Oct 2010 5:08PM
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The evaporation of water depends on the partial pressure of water in the air. Vacuuming to 1/2 an atmosphere will half that partial pressure but you can do better by drying the air before passing it thru the board. Run a few coils of the pick up hose thru the fridge and use gravity to separate the condensate before it goes into the board. (Haven't tried this, just a guess)

flipper4444
VIC, 1214 posts
7 Oct 2010 5:27PM
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Pugwash said...

Place mouth over vent hole and suck. If water in mouth. Taste = yuck. Water = in board.


spot on

Mark _australia
WA, 16937 posts
7 Oct 2010 2:28PM
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FormulaNova said...

I think the vacuum method is relying on the water evaporating at a lower pressure and temperature. If you have a hole in the board as well, you aren't going to get that lower pressure and you will be just drawing air through the board.

The boardlady again has a section somewhere on her site talking about the process of drying boards this way.


Yes, it will evaporate easier but where will it go to with no flow?

Much better to run air through the board witha hole in oen end and vacuum on the vent hole

FormulaNova
NSW, 5971 posts
7 Oct 2010 5:46PM
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Mark _australia said...

FormulaNova said...

I think the vacuum method is relying on the water evaporating at a lower pressure and temperature. If you have a hole in the board as well, you aren't going to get that lower pressure and you will be just drawing air through the board.

The boardlady again has a section somewhere on her site talking about the process of drying boards this way.


Yes, it will evaporate easier but where will it go to with no flow?

Much better to run air through the board witha hole in oen end and vacuum on the vent hole


If its like any of my older boards it will leak around the footstap inserts anyway

I took a look anyway, to refresh my memory:

www.boardlady.com/waterextraction.htm

DrJ
ACT, 481 posts
7 Oct 2010 11:38PM
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FormulaNova said...

I think the vacuum method is relying on the water evaporating at a lower pressure and temperature. If you have a hole in the board as well, you aren't going to get that lower pressure and you will be just drawing air through the board.

The boardlady again has a section somewhere on her site talking about the process of drying boards this way.


This is correct don't drill a whol unless you are talking about a lot of water in which case drill a whole in the. Very end remove vent plug and stand on end let water run out

DrJ
ACT, 481 posts
7 Oct 2010 11:41PM
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Mark _australia said...

FormulaNova said...

I think the vacuum method is relying on the water evaporating at a lower pressure and temperature. If you have a hole in the board as well, you aren't going to get that lower pressure and you will be just drawing air through the board.

The boardlady again has a section somewhere on her site talking about the process of drying boards this way.


Yes, it will evaporate easier but where will it go to with no flow?

Much better to run air through the board witha hole in oen end and vacuum on the vent hole


No flow required, as the water evaporates the vacuum pump pulls out the vapor . It requires a vacuum to work... If you drill a hole you won't get a vac, and will have to rely on normal evaporate which is quite slow.

Ian K
NSW, 2479 posts
8 Oct 2010 12:43AM
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Here's a graph of vapour pressure of water vs temperature. 1 atm = 760 torr. ie. 100 deg at the boiling point.

Have found out that the foam core of a board doesn't like less than 1/2 an atmosphere. So at 40 degrees C you need air as well as water vapour inside otherwise the board will collapse. The graph shows water vapour alone will only provide a ****teenth of an atmosphere at that temperature.

The vacuum pump can hardly separate the water from the air. You've got to have flow thru.



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"Forgot to tighten the vent screw," started by dring44