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Backyard Kite Surfboard Builders - what are you working on?

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Created by FOT 3 months ago, 5 Sep 2017
FOT
WA, 70 posts
5 Sep 2017 9:52PM
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I've been mucking around with building a few boards in the shed since December - mostly poly blanks with stringers, mix of glass / carbon / innegra, epoxy resin and now vac bagging - great fun.

May other backyard builders out there? What have you been working on?

Five boards so far, from first in Jan'17 to latest in August '17;
4"11 Vader copy - too many materials to mention, hand layup, PU blank epoxy resin.


Botched shape, but great construction - 6' Wainman Magnum copy, Balsa Deck with carbon polyflex glass. First Vac Bagged board.

5'2" Vader copy - exposed cork deck with Carbon tail and rails. Cork goes really well (grippy, doesn't affect flex).


First surfboard and resin tints - 6'4" Hypto Krypto shape - 6/4 4/4 glass.




Latest board for a mate - 5'2" Vader with bat tail and flyers. inserts, detailed resin tints - best one so far. Dek layup is Cork, inegra and quad poly flex with reinforcement on the heels, bottom is carbon tapes in the middle, then quad polyflex and 2x 4oz glass (solid board). all Vac bagged.



davnom
VIC, 80 posts
6 Sep 2017 8:29AM
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Great jobs,ever tried to work out what it costs for each board,roughly ?
would love to do that but can't stand the smell of the resins and vapours thinners ect.

FOT
WA, 70 posts
6 Sep 2017 6:49AM
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Select to expand quote
davnom said..
Great jobs,ever tried to work out what it costs for each board,roughly ?
would love to do that but can't stand the smell of the resins and vapours thinners ect.



Depends how much 'fancy' glass/ carbon etc you put in. The hypto copy is pretty ordinary constuction (just st 4 and 6 oz glass, epoxy resin), its probably $250 all up in WA (blanks are a bit more expensive at $120 odd).

The last board there with reinforced strap inserts, cork, colour and fancy glass (inegra abd carbon) was closer to $500 in materials.

On smells etc - its not bad with epoxy - much lower VOCs than poly snd you can remove the use of acetone if you want. Still wear a mask because of the amine in the hardener thou which can have long term ill affects.

sanded
NSW, 55 posts
6 Sep 2017 12:38PM
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Nice work! Good to see you have the shaping bug! What fin system are you using? Footstrap inserts?

Lambie
VIC, 641 posts
6 Sep 2017 7:51PM
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"mucking around with building a few boards in the shed " ???? Check out the shed - thats not just mucking around!! LOL

I 'muck around' fixing boards but 'your' shed beats 'my' shed hands down!! Nice boards :-)

Plummet
3986 posts
6 Sep 2017 5:59PM
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Lambie said..
"mucking around with building a few boards in the shed " ???? Check out the shed - thats not just mucking around!! LOL

I 'muck around' fixing boards but 'your' shed beats 'my' shed hands down!! Nice boards :-)


Hehe. Yep. Awesome but. Certainly that's not mucking around! Looks like a professional set up!

bene313
WA, 1309 posts
6 Sep 2017 8:10PM
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Plus a kids board right?

Your run rate is a board a month!

FOT
WA, 70 posts
6 Sep 2017 8:27PM
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You're right on getting the bug.... may have over invested in the setup in the shed..! Good fun thou!

@Sanded im using futures and 5 hole strap plugs from shapers. Keen to try some of thst basalt and flax cloth with the cork!


.... no other shed shapers out there??

mazdon
737 posts
6 Sep 2017 10:35PM
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Far out!! Where do you kite?
wouldnt mind seeing some of these at the beach...

wish i had the skills and time (and shed)
have tried to prod a mate who does a few diy boards to post here but he never does.

Please keep posting finished and during construction board though, even though I can't contribute, I enjoy looking at them. Have heard good things about the cork for absorbing energy, haven't ever ridden though and no idea how it lays up, or eventually effects flex

bene313
WA, 1309 posts
7 Sep 2017 10:00AM
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mazdon said..
Far out!! Where do you kite?
wouldnt mind seeing some of these at the beach...


citys-trigg in pretty much any conditions because alex is such a frother!!

Surfer62
VIC, 1136 posts
7 Sep 2017 7:50PM
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Home made in '83, last surfed in '84, might give it a run this weekend just for nostalgia







FOT
WA, 70 posts
7 Sep 2017 10:34PM
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Surfer62 said..
Home made in '83, last surfed in '84, might give it a run this weekend just for nostalgia








Awesome! Glad to see you've still got it!

Select to expand quote
mazdon said..
Far out!! Where do you kite?
wouldnt mind seeing some of these at the beach...

wish i had the skills and time (and shed)
have tried to prod a mate who does a few diy boards to post here but he never does.

Please keep posting finished and during construction board though, even though I can't contribute, I enjoy looking at them. Have heard good things about the cork for absorbing energy, haven't ever ridden though and no idea how it lays up, or eventually effects flex


A few in progress pics Mazdon of the last colouful board; photos.app.goo.gl/yqAzIel1ncPD3hFl2



sanded
NSW, 55 posts
9 Sep 2017 1:51PM
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FOT said..
You're right on getting the bug.... may have over invested in the setup in the shed..! Good fun thou!

@Sanded im using futures and 5 hole strap plugs from shapers. Keen to try some of thst basalt and flax cloth with the cork!


.... no other shed shapers out there??


Good to see your experimenting! The Basalt innegra hex weave we do has had good reports for kiteboards!! and the Flax is getting popular. With Cork is would go pretty epic!

Mark _australia
WA, 17054 posts
9 Sep 2017 6:45PM
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Almost done - 5'9" x 19.75" x 2" - 24L. Single concave into slight tail vee, 50/50 hard-ish rails, conventional toe and cant, but bit more tail kick and a fat ass.

I haven't built a board for while (only do repairs now) but needed an off season project. I don't kite either so its all for the love!

XPS, corecell inserts in foot area, normal surfboard glassing schedule as no point wasting heaps of materials on a prototype!








FOT
WA, 70 posts
9 Sep 2017 9:27PM
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Mark _australia said..
Almost done - 5'9" x 19.75" x 2" - 24L. Single concave into slight tail vee, 50/50 hard-ish rails, conventional toe and cant, but bit more tail kick and a fat ass.

I haven't built a board for while (only do repairs now) but needed an off season project. I don't kite either so its all for the love!

XPS, corecell inserts in foot area, normal surfboard glassing schedule as no point wasting heaps of materials on a prototype!










Looks nice! Like the wide tail. How was the xps to shape?

kitcho207
NSW, 817 posts
10 Sep 2017 12:03PM
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Hey. Making a vader type quad with 12inch boxes for foil attachment.
Question...
Do i run the quuads parallel or with toe in. If so how much toe.
Cheers

Mark _australia
WA, 17054 posts
10 Sep 2017 12:14PM
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Its not that wide, well not unconventionally wide. Maybe bit of an illusion in pics
Son says its like a fish, but not so he has named it the Mulie hahhaha as you never know it might stink

XPS was a prick but having said that my planer needs new blades. Plus you want it rough anyway to avoid delam. I only used it as I got a sheet of 100mm that was bent so nobody wanted it and was half price. The bend was damn near a rocker line :)

I can see why XPS is nice it bends a long long way before snapping. Probably why its a bit harder to shape. Its just that damn delam problem if you don't rough it and let it offgas and even then it won't handle a hot hot car in summer. Thus the corecell under the feet as normal heel dents would delam on XPS.

FOT
WA, 70 posts
11 Sep 2017 7:50AM
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Select to expand quote
kitcho207 said..
Hey. Making a vader type quad with 12inch boxes for foil attachment.
Question...
Do i run the quuads parallel or with toe in. If so how much toe.
Cheers


I've been running parallel with no issues. Can have a few mm to in if you want

SugarQube
WA, 485 posts
11 Sep 2017 9:59AM
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Mark _australia said..
Its not that wide, well not unconventionally wide. Maybe bit of an illusion in pics
Son says its like a fish, but not so he has named it the Mulie hahhaha as you never know it might stink

XPS was a prick but having said that my planer needs new blades. Plus you want it rough anyway to avoid delam. I only used it as I got a sheet of 100mm that was bent so nobody wanted it and was half price. The bend was damn near a rocker line :)

I can see why XPS is nice it bends a long long way before snapping. Probably why its a bit harder to shape. Its just that damn delam problem if you don't rough it and let it offgas and even then it won't handle a hot hot car in summer. Thus the corecell under the feet as normal heel dents would delam on XPS.


Hi Mark, nice effort.

Unless you put some divini cell / PVC under the feet area those XPS boards will delam every time, the problem is not the adhesion to the foam, its the foam getting crushed and breaking off, this will start under the impact areas. not worth the heart ache if you dont use PVC aswell.

PU is still the best for boards that you want to last.

FOT
WA, 70 posts
13 Sep 2017 2:44PM
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Select to expand quote
SugarQube said..

Mark _australia said..
Its not that wide, well not unconventionally wide. Maybe bit of an illusion in pics
Son says its like a fish, but not so he has named it the Mulie hahhaha as you never know it might stink

XPS was a prick but having said that my planer needs new blades. Plus you want it rough anyway to avoid delam. I only used it as I got a sheet of 100mm that was bent so nobody wanted it and was half price. The bend was damn near a rocker line :)

I can see why XPS is nice it bends a long long way before snapping. Probably why its a bit harder to shape. Its just that damn delam problem if you don't rough it and let it offgas and even then it won't handle a hot hot car in summer. Thus the corecell under the feet as normal heel dents would delam on XPS.



Hi Mark, nice effort.

Unless you put some divini cell / PVC under the feet area those XPS boards will delam every time, the problem is not the adhesion to the foam, its the foam getting crushed and breaking off, this will start under the impact areas. not worth the heart ache if you dont use PVC aswell.

PU is still the best for boards that you want to last.


100% agree on the PU comment - in kitesurfing where weight isn't really an issue (unless you're into full on Mitu air style), PU let's you use a much simpler and cheaper construction (avoiding HD foam sandwich etc).

On a cost basis, an eps blank when bought in bulk (20 blanks) cut from foam runs around $30... But you need to buy ****loads so not accessible to most backyard shapers, an needs $70+ of hd foam, or carbon etc to get the strength for kiting.

I've been buying blanks from Colin Earle Surf Supplies - good range of Burford Blanks - Burford Blue are the strong ones which Delta use, I'd you're vac bagging you can get away with green (slightly lower density)...

Do you shape your boards in WA Sugarqube?

Mark _australia
WA, 17054 posts
28 Nov 2017 10:04AM
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Hi wind board just finished

5'3" x 18.5 - 18L


Hi density foam underfoot (BTW as did the other one Sugarqube, its not my first rodeo )








Peahi
VIC, 839 posts
28 Nov 2017 10:22PM
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Mark _australia said..
Hi wind board just finished

5'3" x 18.5 - 18L


Hi density foam underfoot (BTW as did the other one Sugarqube, its not my first rodeo )





good job. where is the mast plug tho...? :)

CAUTION
WA, 1022 posts
29 Nov 2017 10:46AM
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Select to expand quote
FOT said..

SugarQube said..


Mark _australia said..
Its not that wide, well not unconventionally wide. Maybe bit of an illusion in pics
Son says its like a fish, but not so he has named it the Mulie hahhaha as you never know it might stink

XPS was a prick but having said that my planer needs new blades. Plus you want it rough anyway to avoid delam. I only used it as I got a sheet of 100mm that was bent so nobody wanted it and was half price. The bend was damn near a rocker line :)

I can see why XPS is nice it bends a long long way before snapping. Probably why its a bit harder to shape. Its just that damn delam problem if you don't rough it and let it offgas and even then it won't handle a hot hot car in summer. Thus the corecell under the feet as normal heel dents would delam on XPS.




Hi Mark, nice effort.

Unless you put some divini cell / PVC under the feet area those XPS boards will delam every time, the problem is not the adhesion to the foam, its the foam getting crushed and breaking off, this will start under the impact areas. not worth the heart ache if you dont use PVC aswell.

PU is still the best for boards that you want to last.



100% agree on the PU comment - in kitesurfing where weight isn't really an issue (unless you're into full on Mitu air style), PU let's you use a much simpler and cheaper construction (avoiding HD foam sandwich etc).

On a cost basis, an eps blank when bought in bulk (20 blanks) cut from foam runs around $30... But you need to buy ****loads so not accessible to most backyard shapers, an needs $70+ of hd foam, or carbon etc to get the strength for kiting.

I've been buying blanks from Colin Earle Surf Supplies - good range of Burford Blanks - Burford Blue are the strong ones which Delta use, I'd you're vac bagging you can get away with green (slightly lower density)...

Do you shape your boards in WA Sugarqube?


FOT, pretty sure ive seen some of ur boards on the beach. looking good!
Ive been using std PU surfboards from VON for around 10 years now and get good lifespan out of them.
After trying some paralell rail boards, i think the stiffer rails is what makes them more efficient for going upwind and creating a different feel.
They are really fun when waves are puss, like our std downwinders. kind of like a mix between a twinnie and a surfboard.
My theory is a PU board with innegra continued up the full rail or 75% instead of just the tail like most surfboard shapers do, with std glassing should work. Keep those rails stiff to stop the torsion. I recon when you start going heavy glass the feel goes to crap.
Sheesh $250-500 bucks, got my ears pricked up to throw some beers your way together with some of my shape ideas...

jamesperth
WA, 497 posts
29 Nov 2017 12:17PM
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I've ridden FOT's 4'11 Vader copy on the metro downwinder.

At 180cm and 85-90kgs I was expecting pretty poor outcome but fark me - it was awesome.

Whether it's FOTs skills In the shed or good fundamental design I don't know but it was heaps of fun and went upwind really well.

Definitely need to think about downsizing for my next SB.

FOT - is my foilboard finished yet ?

(Check out this progress pic everyone )


heyjoe
WA, 26 posts
29 Nov 2017 3:13PM
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Those look awesome mate??
You've obviously done it before!

Below are some pics of my first ever build last year.
$15 foam blank
Couldn't afford a real blank ($300 plus with freight??)
Didn't have a plan apart from wanting to do channels on the bottom like a Firewire evo.
Strange carbon pattern on deck was a combo of not having a plan and the resin going off so just slapped it on fast??
10-12 Oz of cloth to reinforce weak blank.
Its a super fun board. Sounds hollowish when riding??. Goes well in chest to over head waves. Holds the rail on the bottom turn and skatey off the top.
Was worth the effort despite not having the right tools for the job.

Enjoyed the process and will do a super cheap dodgy job again some day!








richswing
WA, 706 posts
29 Nov 2017 6:04PM
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Hey Guys,

FOT loaned me a template of his Vader board and I made the below from scratch including the blank. Her name is "DAFT VADER"

1. Blank made from close cell polystyrene used for insulation. Rocker profile cutout and laminated together with 3 paulonia stringers.
2. Carbon rails, used thin double sided tape, used for sticking fabric together like they use on kites, to stick the carbon fibre strips to the board so it did not move when laminating and also to get the position right.
3. Inserted balsa strips in for the channels so had a hard surface to shape up to.
4. Two 4 oz glass fibre on bottom and 4oz and 6oz ontop.

The board was a bit of an experiment. I found that when shaping the blank the foam sanded quicker than the glue used to laminate the rocker profile strips together leaving ridges. Used light weight spackle to smooth it all off and watered down PVA wood glue to seal.

Sprayed the blank with waterbased epoxy enamel to hide all the imperfections.

Got some rice paper, taped it to overhead projector sheets and printed out the decal using a bubble jet printer.

Findings:
The fibreglass does not sick too well to the blank, I think it is due to the blank being non absorbant and alos the paint.








Took her for her maiden voyage and hit Trigg beach point puting a big hole in the bottom and ripping off the two side fins. Surprisingly she still handled OK I think due to the massive channels.







FOT
WA, 70 posts
1 Dec 2017 4:45AM
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Looks awesome Rich, still need to see it in the flesh!

The Evo looks like heaps of fun heyJoe, where do you ride it?



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