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Backyard Kite Surfboard Builders - what are you working on?

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Created by FOT > 9 months ago, 5 Sep 2017
Mark _australia
WA, 22340 posts
20 Sep 2018 5:21PM
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New one- more suited to bigger waves but still going to carve up the smaller stuff.
'Experiment in very light construction- still same foam, still heavier glassing than a surfboard, with wood and carbon kevlar in standing area- and way lighter then production boards due to vacuum bagging and care.







FOT
WA, 101 posts
22 Sep 2018 3:51AM
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Select to expand quote
Mark _australia said..
New one- more suited to bigger waves but still going to carve up the smaller stuff.
'Experiment in very light construction- still same foam, still heavier glassing than a surfboard, with wood and carbon kevlar in standing area- and way lighter then production boards due to vacuum bagging and care.









That looks awesome Mark! I've been outbid the shaping bay for a while so nothing to show just yet.

How did you get the pro matt finish? Looks great.

bjw
QLD, 3615 posts
22 Sep 2018 6:20AM
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Mark, your board building always impresses me. Can you explain why the vacuum bagging increases the strength? How many layers are you using of glass?

Mark _australia
WA, 22340 posts
23 Sep 2018 10:30PM
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Sorry - big weekend

FOT- pro matt...?

BJW - vacuum bagging reduces resin usage and forces it to flow better into the base material (foam, wood whatever) and all the little gaps in between cloth layers. Stronger, thinner laminate.
But it can seriously change the rockerline unless its done correctly so its not used on normal surfboards, nobody would pay for all that extra labour.
Laminating the bottom as normal (the green board about is 10oz bottom) and then bagging all the deck layers on using a rocker spine to keep it all true in the vac bag is the go.
Deck is 4oz, wood but only in back to front foot like an hourglass shape, CK over back half then 4oz again.
Really its a sufboard lam with a more serious deck patch and some wood. Very little extra, but where its needed

Factory kiteboards will use same EPS blank, wood and glass each side and just compression mould it. Strong but a bit heavier than handmade care.... and the glass is usually minimal and crap quality, its almost just a sealer over the wood. And same as windsurf boards - I've seen some extraordinary lies, and some gross mistakes. You never know whats actually in it till it breaks....


FOT
WA, 101 posts
24 Sep 2018 4:31AM
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Mark _australia said..
Sorry - big weekend

FOT- pro matt...?

BJW - vacuum bagging reduces resin usage and forces it to flow better into the base material (foam, wood whatever) and all the little gaps in between cloth layers. Stronger, thinner laminate.
But it can seriously change the rockerline unless its done correctly so its not used on normal surfboards, nobody would pay for all that extra labour.
Laminating the bottom as normal (the green board about is 10oz bottom) and then bagging all the deck layers on using a rocker spine to keep it all true in the vac bag is the go.
Deck is 4oz, wood but only in back to front foot like an hourglass shape, CK over back half then 4oz again.
Really its a sufboard lam with a more serious deck patch and some wood. Very little extra, but where its needed

Factory kiteboards will use same EPS blank, wood and glass each side and just compression mould it. Strong but a bit heavier than handmade care.... and the glass is usually minimal and crap quality, its almost just a sealer over the wood. And same as windsurf boards - I've seen some extraordinary lies, and some gross mistakes. You never know whats actually in it till it breaks....




I mean the finish on the surface of the board. It looks like a mat-finish (as opposed to shiney finish).

I like the idea of just vsc bagging the top, after doing the bottom to maintain the rocker - less material costs too.

Mark _australia
WA, 22340 posts
24 Sep 2018 10:57AM
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OH yeah - just matting additive, I always spray 2K so this is 50% matting additive (full matte). Over the CK is just gloss clear.

Funny story though, the grey-blue colour was for a windsurf board repair that I had to match. I have limited leftovers but stuffed around for about 20mins getting the colour right - light grey, blue/grey, black, drip of orange. Spot on. Then stuffed around a bit getting the right amount of matting additive but was very happy, its was spot on.
Used the leftovers on the kiteboard.

Then realised it just looks like primer with a drop of blue

FOT
WA, 101 posts
24 Sep 2018 11:21AM
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Mark _australia said..
OH yeah - just matting additive, I always spray 2K so this is 50% matting additive (full matte). Over the CK is just gloss clear.

Funny story though, the grey-blue colour was for a windsurf board repair that I had to match. I have limited leftovers but stuffed around for about 20mins getting the colour right - light grey, blue/grey, black, drip of orange. Spot on. Then stuffed around a bit getting the right amount of matting additive but was very happy, its was spot on.
Used the leftovers on the kiteboard.

Then realised it just looks like primer with a drop of blue


Cool. Will have to hit you up for some tips on spraying when I finally get my room up and running again. Haven't done any sprays, just resin tints.



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"Backyard Kite Surfboard Builders - what are you working on?" started by FOT