Does carbon fiber along the stringer actually make your board less likely to snap?

[GromsDad]

EPS

FYI I did an experiment. I took a off cut of US Blanks Superfused 1.5 lb EPS from a recent build. I weighed it on a postal scale with a stone on top. Then I took the stone and eps and fully submerged them in water for for 7 hours. Weighed it again. No change. Zero. So, at least with...

forum.surfer.com

That test is seriously flawed. Superfused is better though as I understand it.

 

[One-Off]

That test is seriously flawed. Superfused is better though as I understand it.

How is it flawed?

 

[GromsDad]

How is it flawed?

For starters, if you put a rock on top of a piece of eps in water you are compressing it thereby preventing it from absorbing water. An EPS board draws in water via expansion and contraction due to internal pressure changes.

 

[Sharky]

I've seen carbon fiber on boards that was nothing more than a rice paper lam. As in fake carbon fiber? From a big manufacture. That charged extra for the carbon fiber.

 

[One-Off]

For starters, if you put a rock on top of a piece of eps in water you are compressing it thereby preventing it from absorbing water. An EPS board draws in water via expansion and contraction due to internal pressure changes.

For starters, the foam was totally submerged...for 7 hours.

The piece of EPS was about 12" x 3" x 1-1/2". Surface area approximately 54 square inches. How many square inches is the typical ding? The pebble was the size of a kiwi and rounded.The surface of the stone touching the foam was probably 3/8" square, so less than 1% of the total surface area. It was not heavy enough to (visually) compress the foam. The compression of the foam would have been water pressure over 99% of the surface. I guarantee that pebble itself was not preventing water intrusion. That's a silly assertion.

If you want to say that some cheap builds have water intrusion problems like Sharky said in the EPS thread, that's one thing, but I will stand by my assertion that a ding on a board made with US Blanks superfused EPS will not suck water.

I still recommend fixing dings as soon as you get them.

 

[Drumsurf]

I'm convinced all carbon fiber type strips are for show.

Same. Last two customs I’ve ordered have been without. I just like the more traditional/clean, look. White board with a stringer. No stripes.

 

[Mr J]

EPS

FYI I did an experiment. I took a off cut of US Blanks Superfused 1.5 lb EPS from a recent build. I weighed it on a postal scale with a stone on top. Then I took the stone and eps and fully submerged them in water for for 7 hours. Weighed it again. No change. Zero. So, at least with...

forum.surfer.com

what you would need to do is take a tail offcut or something of that width approximately, plane it both sides, then glass it with a layer of 4oz completely wrapping all sides, give it a filler coat. Puncture it. Place it in wide tray of water - then using your foot hop up and down on it until you get some light footwells, while the puncture is immersed in water. You would have created yourself a pump that squeezes out air thru the puncture then sucks water back in - see how superfused does then.

Better still would be a long piece of foam, glassed and punctured, then flex it under load while immersed a number of times without putting in footwells.

Another experiment might be to put that punctured glassed foam in a hot car for a while, then immerse it in cold water.

 

[GromsDad]

what you would need to do is take a tail offcut or something of that width approximately, plane it both sides, then glass it with a layer of 4oz completely wrapping all sides, give it a filler coat. Puncture it. Place it in wide tray of water - then using your foot hop up and down on it until you get some light footwells, while the puncture is immersed in water. You would have created yourself a pump that squeezes out air thru the puncture then sucks water back in - see how superfused does then.

Better still would be a long piece of foam, glassed and punctured, then flex it under load while immersed a number of times without putting in footwells.

Another experiment might be to put that punctured glassed foam in a hot car for a while, then immerse it in cold water.

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This guy gets it. Also expose the sample to rapid 20 degree temperature changes.

 

[One-Off]

what you would need to do is take a tail offcut or something of that width approximately, plane it both sides, then glass it with a layer of 4oz completely wrapping all sides, give it a filler coat. Puncture it. Place it in wide tray of water - then using your foot hop up and down on it until you get some light footwells, while the puncture is immersed in water. You would have created yourself a pump that squeezes out air thru the puncture then sucks water back in - see how superfused does then.

Better still would be a long piece of foam, glassed and punctured, then flex it under load while immersed a number of times without putting in footwells.

Another experiment might be to put that punctured glassed foam in a hot car for a while, then immerse it in cold water.

I'll do that.

 

[GromsDad]

Its the breathing of the board's internal pressure changes that sucks the water in through dings. The majority of the water stays just under the glass as it spreads among the beads that get opened up as the board is shaped and in any space it can find between beads.

If you've ever repaired an EPS board on a warm day you can have problems with air bubbles as the air escapes. If you put a bag of ice on the board near your repair you can get the board to stop blowing air bubbles or draw resin in. That's an example of how the board breathes and can draw water in.

 

[menobrah]

what you would need to do is take a tail offcut or something of that width approximately, plane it both sides, then glass it with a layer of 4oz completely wrapping all sides, give it a filler coat. Puncture it. Place it in wide tray of water - then using your wanger pump up and down on it until you get some light footwells, while the puncture is immersed in water. You would have created yourself a pump that squeezes out air thru the puncture then sucks water back in - see how superfused does then.

Better still would be a long piece of foam, glassed and punctured, then flex it under load while immersed a number of times without putting in footwells.

Another experiment might be to put that punctured glassed foam in a hot car for a while, then immerse it in cold water.

fixed for your pleasure