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Hollow Wood Strip Kiteboard
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Post new topic   Reply to topic    Northwest Kiteboarding -> Gorge / Portland / Oregon Coast
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Kitesail

Since 23 Jun 2006
108 Posts
The Gorge
Stoked



PostSun Feb 22, 09 11:13 am     Reply with quote

Huh -
Turned out to be lighter than I expected. My scale at home is a spring type (4.5lbs); so I wanted to see what the difference with the digital scale at work would be....
4lbs Shocked nice..........

1rst Coat; Prep before glassing.


   JB-Fish-Weight.jpg 
   PrepCoatT.jpg 

_________________
John B
A good day is any day; A great day is a WINDY day!

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jsj

Since 11 Sep 2006
83 Posts
Hood River
 



PostSun Feb 22, 09 11:35 pm     Reply with quote

*sweet* workmanship. I admire your dedication too. I'm astounded how fast you've progressed on it.

Best Regards

-John

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bwd

Since 04 Aug 2007
385 Posts

Obsessed



PostMon Feb 23, 09 8:43 am     Reply with quote

Looking better every day.
The board I popped was a lightwind ply twin tip. The design was thin ply skins, and a 1/4 inch thick core, with big cavities each side of a center stringer to lighten it.
I used hardware store $%#@! foam, and only had a few vent holes, which weren't enough, so it popped. So it was small amount of space, rigid board, and poor planning. Eventually finished it, the ply was crap too, it all checked, now its under a couch. Rode once, for like a minute -lame, lessons learned. I think it weighs 100# or so.

A better way might be to determine the expansion of a mix-it-yourself marine foam under your conditions, and calculate the volume you have to fill, before very carefully trying to inject it. I'd practice on a mock-up.
I'd also want a vent hole every inch or 2 probably, which might be ugly, although you could cut contrasting plugs for the holes to make a cool pattern, it would be a lot of work. In my humble opinion, you might still be playing craps with your nice board though.

If I tried a hollow surfboard, with foam inside, I'd put the foam in before the top skin of the board was glued on. I've made a couple of more successful twin tips that way.
But I'd rather just strip the top deck without gluing it to the backbone, then pop it off, and add 8oz glass underneath the standing area, so the part you stand on could be a sandwich, but no foam.

Or you could just try an extra couple layers of glass on the outside in the standing area. Wink

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Kitesail

Since 23 Jun 2006
108 Posts
The Gorge
Stoked



PostThu Feb 26, 09 7:41 pm     Reply with quote

bwd -
Thanks for the info. Wink
I did find some poly foam with minimal expansion. I injected some into the area where the vent plug will go; (top side near the tip) you may see the hole in the pic's below. The foam has plenty of air space to expand, it all went fine no worries.
I never intended to foam the whole board, I feel it's plenty strong as is.

I'm only going to inject foam for setting foot plugs and fin boxes. It will provide a secure bond between the upper and lower decks and provide a well for the plugs.

Mt. Hood Meadows has been awesome this week, so I'm not done yet. It's all glassed now top and bottom. I'll set the boxes next.

John


   Taped.jpg 
   Extra-Glass1.jpg 
   Extra-Glass2.jpg 
   Top-Glass1.jpg 
   Top-Glass2.jpg 
   Bottom-Glass1.jpg 
   Bottom-Glass2.jpg 

_________________
John B
A good day is any day; A great day is a WINDY day!

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Sella

Since 21 Apr 2007
1794 Posts
Doin' The Dalles
FLY'IN HIGH PIE GUY



PostFri Feb 27, 09 5:30 am     Reply with quote

Looking fantastic John. Keep those pics coming...my brother and I are watching this and are very curious about setting the boxes. Shocked

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Yardsale

Since 29 Mar 2005
387 Posts
Portlanastan
Obsessed



PostFri Feb 27, 09 3:13 pm     Reply with quote

But will she float????? Hah ha, nice work John....can't wait to ride it.....but you can try it first! Very Happy Very Happy Very Happy

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jbruxer

Since 24 Jul 2005
398 Posts
Beaverton, OR
Obsessed



PostFri Feb 27, 09 3:58 pm     Reply with quote

Hey John, just curious...and sorry if you mentioned this earlier, but what made you decide on the swallow tail design? Looking great! And to ecco what the others are saying, keep the pics coming. Very Happy

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jbruxer

Since 24 Jul 2005
398 Posts
Beaverton, OR
Obsessed



PostFri Feb 27, 09 3:59 pm     Reply with quote

Hey John, just curious...and sorry if you mentioned this earlier, but what made you decide on the swallow tail design? Looking great! And to ecco what the others are saying, keep the pics coming. Very Happy

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Kitesail

Since 23 Jun 2006
108 Posts
The Gorge
Stoked



PostSat Feb 28, 09 12:38 pm     Reply with quote

jbruxer -
I chose the Swallow Tail for a couple of reasons.
1. It allows for a wider tail, which helps with the Quad Fin Layout.
It also helps to release the flow and keep it centered.
2. Using the Quads/Swallow Tail; the two rear fins do not cause any turbulance allowing the center to flow free.

At least that's my theroy Cool

Some pic's of the fin box installation. I'll probally do it different next time since I now know some alternatives, that might work to an advantage. Wink

enjoy.......


   FinBox1.jpg 
   FinBox2.jpg 
   FinBox3.jpg 
   FootPlug1.jpg 
   HotCoat2.jpg 

_________________
John B
A good day is any day; A great day is a WINDY day!

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blancoh2o

Since 15 Mar 2005
1154 Posts
Oregon
Phishy



PostSat Feb 28, 09 4:12 pm     Reply with quote

John,

That board is going to be the best riding board in the world for you.

You know why?

Because you can say you built it on your own.

That is one beautiful piece of art.

I wish I had the patients and skills/guts to try and build something like that. All I would be thinking is don't F this thing up. Then I would say to myself "if I don't finish it, I can't screw it up" so it would sit there halfway done and collect dust. And my wife would say "what are you going to do with that thing in the garage"?

Awesome Johnny B, Awesome!

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Kataku2k3

Since 14 Aug 2005
3753 Posts
Los Angeles, CA
Videographer



PostSat Feb 28, 09 4:22 pm     Reply with quote

Awesome! Just out of curiousity, do you use some sort of jig on a router to cut the fin boxes out?

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rePete

Since 18 Dec 2007
215 Posts
Mosier, Oregon
Stoked



PostSat Feb 28, 09 10:49 pm     Reply with quote

John, are you going to have your beautiful work of art at the shop tomorrow? I'll stop by. The fin lay out looks very nice! You're getting close!!
Pete

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kitebot

Since 20 Feb 2007
251 Posts

Obsessed



PostSun Mar 01, 09 8:47 am     Reply with quote

What a beauty, nice work John. Thanks for sharing the pictures with us.

Cheers,

Adam (the guy who bought a used Waroo from you a couple years ago and who now secretly hopes there'll be a used woodstrip kitesurfboard posted one of these days Wink )

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blowhard

Since 26 Dec 2005
2026 Posts

Windward



PostSun Mar 01, 09 8:49 am     Reply with quote

Kataku2k3 wrote:
Awesome! Just out of curiousity, do you use some sort of jig on a router to cut the fin boxes out?

futures makes a jig and router kit
used to be $180

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Bolt

Since 02 Nov 2008
111 Posts
Floras Lake
Stoked



PostSun Mar 01, 09 11:24 am     Reply with quote

beautiful, looks like some serious craftsmanship!

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pdxmonkeyboy

Since 16 May 2006
6081 Posts
forever labled as the
retired kiter & motorhead Unicorn Master



PostSun Mar 01, 09 12:01 pm     Reply with quote

Seriously nice craftsmanship. Makes me want to post pictures of my latest wood project but my mortise and tennon skills would be somewhat embarrassing. Working with wood is a subtractive art and is not easy at all.

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Kitesail

Since 23 Jun 2006
108 Posts
The Gorge
Stoked



PostSun Mar 01, 09 5:10 pm     Reply with quote

Thanks so much, you all have been great!!!
7.2lbs and solid; as solid or maybe even more than any epoxy board I've owned.

Next pic's will have to be some action shots Wink

Hopefully some wind this week Very Happy

BYT: I did make a template for the Quads.

John


   HotCoat5.jpg 
   Finished-Weight.jpg 
   Finished-Bot.jpg 
   Finished-Top.jpg 
   Padded.jpg 
   HomeFurniture.jpg 

_________________
John B
A good day is any day; A great day is a WINDY day!

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