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To vent or not to vent a kite board for hydrofoiling?

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revhed
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To vent or not to vent a kite board for hydrofoiling?

Postby revhed » Mon Mar 10, 2014 1:06 pm

Hello,
I think I read here somewhere that a board builder recommends installing a "vent plug"
in boards. I did a search but did not find?
If you have info about this please share ideas and products, explanations.
I have a board that no matter how much I try to dry it out, off season, it always seems to open up again and bleed salt h2o. As it is airex core I don't worry to much but I have another with cheap strofoam? core and would like it to last.
Is this vent plug like a one way valve of some sort?
Thanx R H

zfennell
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby zfennell » Mon Mar 10, 2014 1:48 pm

hi,
the purpose of the vent is to prevent excessive expansion/contraction of the air inside your board.
hollow boards and those made with low density foam ( <2 lb/ft^3) can easily expand/deform with small changes in the pressure difference across the skin.

typical causes: the unpressurized cargo bay of a commercial airline or trunk of your car on a sunny day. also cheap XPS cores with poor bond strength to the skin

the vent is not intended to be a drain plug for leaks from other places in the skin.
but if you have a leak you intend to repair AND the internal structure of your board will allow ait to pass thru the core ..then why not use it?

once the skin expands regardless of the reason, delam from the core is likely and things go downhill from there.


i believe solid cores strong enough to be used for kite-boards do not need vents.
but sandwich skins on low density eps cores may find them useful.
pink XPS cores could use them but there is no way for the air to migrate thru the board.

regards,
-bill

ronnie
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby ronnie » Mon Mar 10, 2014 2:15 pm

This is a maintenance-free version of a vent plug. Uses a Goretex membrane, so air can get in and out but water can't.

http://www.standupzone.com/forum/index. ... ic=15918.0

revhed
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby revhed » Mon Mar 10, 2014 5:18 pm

Thanx for info guys,
Wow 30 usd for gortex vent plug, but it looks good!
R H

tkettlepoint
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby tkettlepoint » Mon Mar 10, 2014 5:34 pm

rev do it brother. the board will last that much longer. my sup will whistle when I pull the screw out of it for 30+ sec


terrie

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Re: To vent or not to vent a kite board for hydrofoiling?

Postby Randahl » Mon Mar 10, 2014 5:43 pm

You might be referring to the attached post
Attachments
Capture.JPG

revhed
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby revhed » Mon Mar 10, 2014 6:05 pm

HUGE thanx Terry, tkettlepoint and Randahl! :D
Yes this was what I saw, you guys are the best, I will do makes perfect sense! :!:
Again, super cool!!
R H

tkettlepoint
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby tkettlepoint » Mon Mar 10, 2014 11:00 pm

no worries... just like to help out.. I have seen a Production SUP with a vent plug in it bubble for hours when I did a 3 hour paddle last summer that was well in the water.

To me it is just insurance so your board doesn't delam before it's time

terrie
jellyfishboards.com
"chasing my dreams one letter at a time"

Tone
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby Tone » Tue Mar 11, 2014 10:30 am

Temavento boards don't have a vent.

I remember Jimmy saying something about the skin being thick enough and strong enough it wasn't needed.

regards

Tony

tkettlepoint
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Re: To vent or not to vent a kite board for hydrofoiling?

Postby tkettlepoint » Tue Mar 11, 2014 11:35 am

http://www.greenlightsurfsupply.com/ven ... -V314.aspx
14 usd each.

if a board is layed on the beach or in a car long enough there will be a large amount of pressure inside of it... If the glass is that thick you will loose feel of the board. ( won't feel like a surfboard) Yes we can make anything a person wants but I just think that for 14 dollars that is cheep insurance so the board won't crack. The thicker the board the more pressure it will make.

The first place that it will crack is around inserts or fin boxes, just a hair line crack. And then water slowly seeps in and delam happens over time... think of a zip lock bag with zipped shut and tossed on the ground in the sun for the day. what happens? it inflates and condensation happens inside. Well if a board can not breath what is going to happen. It is a sealed shell .

just my 2 cents and I will put them in

Terrie
www.jellyfishboards.com
"chasing my dreams one letter at a time"


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