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GB70 course racing board

here you can exchange your experience and datas about your home build boards


zmax
Rare Poster
Posts: 42
Joined: Thu Apr 15, 2010 10:51 pm
Kiting since: 0
Local Beach: Belmont Shores
Style: Freeride
Gear: North rebel '09 14m or 9m
homemade surfboard and twintip
Brand Affiliation: None

Re: GB70 course racing board

Postby zmax » Sat Aug 04, 2012 4:52 am

Thanks for the kind words about he board.
I was riding a surfboard before I got on a race board. You'd think it would be an easy transition, but it's much different. Almost felt like I was learning to kite all over again. If you do end up making a raceboard, make sure to get the foot straps in the correct position. Makes all the difference in how the board will ride.
Didn't get a chance to weigh before everything was on. Board with pad, straps, fins it comes in at 20 lbs. I don't think that's real heavy, but it not exactly light either. The new race board coming out now are in the 12-13lb range without fins.

gbleck
Very Frequent Poster
Posts: 546
Joined: Mon Oct 08, 2007 4:39 am

Re: GB70 course racing board

Postby gbleck » Sun Aug 05, 2012 7:49 pm

If memmory serves around 7.5-8kg bare deck so way heavy. I'm not sure on that though it may be lower then finished weight. I'm interested to see how the 1lb holds up.

Big thanks again to Garry Menk at kiteracing.com for his information and advice on the design and building technique.

zmax
Rare Poster
Posts: 42
Joined: Thu Apr 15, 2010 10:51 pm
Kiting since: 0
Local Beach: Belmont Shores
Style: Freeride
Gear: North rebel '09 14m or 9m
homemade surfboard and twintip
Brand Affiliation: None

Re: GB70 course racing board

Postby zmax » Fri Mar 08, 2013 11:02 pm

Raceboard round 2.
189cm x 70cm, 2lb eps core, Carbon rails, 2mm paulownia wood bottom, vac bagged. Learned a lot from my first build. This one came out much better in my opinion. Foot strap placement can make so much difference in how the board rides. Got this one pretty close on the first try. Just had to move the front strap back a couple of holes on the inserts. If you use the measurements that Garry suggest you'll have a good start.
http://kiteracing.com/forum/index.php?topic=778.0
Attachments
IMG_1331.JPG
IMG_1330.JPG

BWD
Very Frequent Poster
Posts: 2775
Joined: Thu Jun 05, 2003 3:37 am

Re: GB70 course racing board

Postby BWD » Fri Mar 08, 2013 11:19 pm

Looks cool!
Is the deck all glass or is there a sandwich layer in the deck patch area?
Hard to tell from picture, can you divulge the layup?
Thinking about venturing into EPS cored boards myself....

zmax
Rare Poster
Posts: 42
Joined: Thu Apr 15, 2010 10:51 pm
Kiting since: 0
Local Beach: Belmont Shores
Style: Freeride
Gear: North rebel '09 14m or 9m
homemade surfboard and twintip
Brand Affiliation: None

Re: GB70 course racing board

Postby zmax » Fri Mar 08, 2013 11:41 pm

Layup
RR epoxy
deck- 2 layers 4oz glass full length of board wrapped over carbon rails.
-1 layer 4 oz 3/4 deck patch
-2 additional 4oz patches at 45deg over footstrap inserts and fin boxes.
bottom -1 layer 4oz under with 2 layers os 4oz around fin boxes
2mm paulownia wood
-layer 4oz over.
carbon rail are 8oz woven carbon fiber. Probably could have gone with 6oz, but got a good deal on the 8oz.
My idea was to keep it somewhat light and put the additional glass in the areas that take more abuse.

The different color on the deck is the traction additive. I just used some epoxy paint nonskid additive to some RR epoxy. Rolled it on with a paint roller. Works great.

gbleck
Very Frequent Poster
Posts: 546
Joined: Mon Oct 08, 2007 4:39 am

Re: GB70 course racing board

Postby gbleck » Sat Mar 09, 2013 3:31 pm

Nice. Looks light and solid. Still working on cleaning and rebuilding my shaping room.

BWD
Very Frequent Poster
Posts: 2775
Joined: Thu Jun 05, 2003 3:37 am

Re: GB70 course racing board

Postby BWD » Sun Mar 10, 2013 2:32 am

That thing is cool. Hope it serves you well!
Wish I could get paulownia more easily here in US

zmax
Rare Poster
Posts: 42
Joined: Thu Apr 15, 2010 10:51 pm
Kiting since: 0
Local Beach: Belmont Shores
Style: Freeride
Gear: North rebel '09 14m or 9m
homemade surfboard and twintip
Brand Affiliation: None

Re: GB70 course racing board

Postby zmax » Sun Mar 10, 2013 3:40 pm

Paulownia is pretty hard to find. A couple of guys making surfboards on swaylocks sourced paulownia strips from Ikea blinds. I've used them on several boards now and had great results. I'll have to post a pic of the bottom of that board. Used these strips:
http://www.ikea.com/us/en/catalog/products/10117518/.

gbleck
Very Frequent Poster
Posts: 546
Joined: Mon Oct 08, 2007 4:39 am

Re: GB70 course racing board

Postby gbleck » Thu Mar 21, 2013 4:37 pm

I think I may have found a palwina vainer supply in Wisconsin.

BWD
Very Frequent Poster
Posts: 2775
Joined: Thu Jun 05, 2003 3:37 am

Re: GB70 course racing board

Postby BWD » Thu Mar 21, 2013 5:57 pm

blinds, that's brilliant!
I knew there had to be something in the space between cheap asian junk furniture and overpriced raw planks!
gbleck, I'm all ears if you care to post or pm that info... Hope it pans out!
I like working with cedar, but eventually too much gets in my nose, then the project becomes a pain until sealed... :x


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