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Old 20th October 2006, 07:55 AM   #13
Roger
Dream Team - School Guru
 
Join Date: Aug 2006
Posts: 2,110
Default RE: Help - Water in the hole!

Hi Greenroom and Egor,
For Greenroom:
If you were somehow "in a hurry" to get the water out of your board, yes, you could do several cycles per day if you have good hot sunshine and a cool dry de-humidified place to allow the board to cool for a few hours.
What's actually taking place when you allow the board to "heat up" in the sun is that some percentage of the "liquid water" is converted to water vapor and this develops some "vapor pressure"
The warm moisture laden "vapor" then escapes out the vent hole due to a "pressure differential" between the captive moisture laden "vapor" and water inside your board and the normal atmospheric pressure outside your board.
As far as the "wick" is concerned, check out Eva Holiman's "The Board Lady.com" site. Eva is a well know yacht and materials engineer and she really knows all the tricks here.
Eva suggests twisting the paper towel into a wick and putting the end down in the "pool" of liquid water at the base of the vent plug hole.
This will pull the water up into the paper towel (wicking action here) and Eva further suggests placing a fan so it blows on the fanned out paper towel outside your board to turn the moisture collected by the wick into water vapor to keep the wick "drawing".
It's a good idea to leave the vent plug in for a little while after placing the board in the sun (especially when you wicked out all possible "liquid water" at the bottom of the vent hole) as this will build up a little vapor pressure (and eventually after enough cycles, simple dry air pressure) so the board will "hiss" slightly when you remove the plug. This indicates a positive vapor pressure inside the hull and that will want to escape to the lower atmospheric pressure outside the hull, carrying moisture out of the board as the moist air expands. Warm air carries significantly more moisure than cold air.
So, leave the plug sealed for a few minutes to create some pressure inside your board (not too much, only leave it in a few minutes or you risk some delamination of the skin composites from the foam) and then let that pressure carry as much moisture out of your board as possible.
Overall, if you know someone with a vacuum pump, or you can rent one, about 8 in. of vacuum should cause the vapor pressure inside your board to make the water "boil" and it will come out of the board far more quickly and effectively.
For Egor:
Amusing, but we don't want to offend the ladies that read this forum, right?
And be sure you don't get the kind that cause "Toxic Shock Syndrome".
Our boards don't need that.
Walking into the gynecologists office with your board under your arm or on your head would be even harder to explain......right?
Hope this helps
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