R equipment

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satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

R equipment

Post by satch » Mon Dec 15, 2014 6:19 am

hey y'all!

Thought that maybe someone wanted to see my first snowboard. It's supposed to be a christmas gift to my girlfriend.

measurements:
Length 1550
Shape 298 / 251 / 278
Radius 7.7m
stance 500 -600 mm
setback 25 mm
shape:
Image

Thanks to everyone who provided input!


Hybrid S-Rocker with camber under the backfoot and a long nose rocker starting right under the front foot (thanks. 3/4- Edges with aluminum tip and tail savers.

1) base with edges and tip and tail savers spray glued to my adjustable mold
Image

2) profiled core with wooden tip spacer
Image

3)layup under vacuum
Image

4) base before flashing
Image

5) finished board with epoxy topcoat
Image

if you've got any questions I'm happy to answer them.
Only thing to do now is grind away the epoxy that got onto the base. Do you guys have a clue how to do that by hand? the base is a bit convex and my local shop is afraid they'd grind through the base in the middle if they run it through their machine.

Cheers,
Sebastian

Dtrain
Posts: 546
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Location: Prince Rupert/Terrace B.C.

Post by Dtrain » Mon Dec 15, 2014 7:09 am

Looks rad. You paint those graphics ? To sand you can use a belt sander. First use a metal scraper and some elbow grease. The shop should be able to do it if they don't use the autofeed. I don't think I've ever had a truly flat board the wasn't a split. I do prefer convex though. Concave all you can do is push hard and grind away those edges . Huge weight savings though Lol

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falls
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Location: Wangaratta, Australia

Post by falls » Mon Dec 15, 2014 4:17 pm

looks great
Did you do anything special for aluminium bonding?
Does the aluminium have a step in it like the edges?
Don't wait up, I'm off to kill Summer....

gav wa
Posts: 375
Joined: Tue Feb 18, 2014 8:58 pm
Location: Perth

Post by gav wa » Tue Dec 16, 2014 1:31 am

That looks sweet as man.

It's a powder board right?
How far convex is it? Your talking base would grind first in the middle during base grind right? (Some people seem to look at this the other way)
If it is too much to safely grind you could do it by hand with a belt grinder and leave some of the convexity, it will be a bit loose on the groomers but wont matter in powder.

satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

Post by satch » Tue Dec 16, 2014 2:13 am

Thanks! I'm pretty happy with the result myself! And as the board has some pink paint and glitter on it my girlfriend will be happy as well.

the pink stripes and my logo are painted using water based acrylic paint. directly painted on the base. after pressing I sealed the top with epoxy before using the paint and then a second coat of epoxy.

The aluminum has some holes in it i used to hold it on my cnc. in addition i used a coarse sandpaper to help bonding.

Yeah supposed to be used mainly in powder. just checked the base again. it's only really convex in the rockered part . if i hold a straight ruler to the base so that it touches the edge on one side the distance between edge an ruler is about a mm. I'mm gonna risk it and give it to the shop.

gav wa
Posts: 375
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Location: Perth

Post by gav wa » Mon Dec 22, 2014 4:41 pm

If its only out that much you will be fine. Thats only half a mm proud in the middle. She's gonna love it. Nice job.
Maybe just point out the convex area to the shop so they can be careful with it.

satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

Post by satch » Mon Jan 19, 2015 12:05 pm

the board was a success! my local shop did a really good job with the first service and my girlfriend could not believe her eyes when she saw it.

Next project is nearly finished. A stiff powder ski for myself.
the dims:
length: 1960mm
tip 146mm
mid 126mm
tail 140mm
radius 23000mm
matching rocker radius
Image
core made of fir with epoxy/graphite sidewalls
tip and tail spacer made from corecell

Image

CNC ed die cut base.
Top sheet consists of a very light hybrid carbon/kevlar weave. Unfortunately it doesn't look black and yellow as the dry cloth does. even from upclose it seems to be some kind of military olive grey.

need some final coats of polyurethane varnish and a base grind.
questions welcome

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falls
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Location: Wangaratta, Australia

Post by falls » Mon Jan 19, 2015 4:42 pm

looks pretty cool
did you centre the full rocker radius at the waist point of the ski?
3mm corecell? and is it exposed to the outside at the edges or you said you had some type of sidewall as well?
Don't wait up, I'm off to kill Summer....

satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

Post by satch » Tue Jan 20, 2015 1:23 am

from the cd screenshot you can see that there is a two step nose lift in the front starting 500mm in front of the waist point.
it's 3mm corecell. i used a cap construction in tip and tail so that the corecell is not exposed to humidity. The sidewalls consist of epoxy mixed with graphite powder and cotton fibres. I ran out of PU. I'm pretty sure they'll hold up.

pmg
Posts: 435
Joined: Sat Dec 01, 2012 8:59 am
Location: Sonthofen

Post by pmg » Tue Jan 20, 2015 9:46 am

Hey,

nice rocker Profile - with the right snow this ski surely rocks as hell!

What is that green stuff on your base?

satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

Post by satch » Wed Jan 21, 2015 1:55 am

It's green base material. I could use the cnc cutter at my university to cut my bases. As the table isn't long enough I had to cut multiple parts anyway.

satch
Posts: 49
Joined: Wed Mar 28, 2012 5:38 pm

Post by satch » Mon Feb 02, 2015 10:04 am

Hey All!

I had some leftovers from the girlie pow board. So I decided to build one for myself. I had a spare core with about 1560mm. As I'm 193cm tall I'd usually go for a much longer board. So I decided to build a board similar to the hovercraft by jones snowboards. A friend cnc'd the templates for base and core. I'm just not so suire any more about binding positioning.
Here is the boards outline. Where would you guys put the center of the stance (currently set at 700mm from the tail)?
Image

I'll be using camber between the feet and a continous rocker starting under the front foot.

Cheers,
Sebastian

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chrismp
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Location: Vienna, Austria

Post by chrismp » Tue Feb 03, 2015 12:30 am

I'd say look for the middle of your sidecut and set the stance back about 10-20mm.

gav wa
Posts: 375
Joined: Tue Feb 18, 2014 8:58 pm
Location: Perth

Post by gav wa » Tue Feb 03, 2015 5:52 am

Yeah I would agree exactly with what Chris said.

If you build a swallow tail you can move the bindings forward of the center of sidecut and you get a quicker turning board with a lot of power and feedback but for this shape I would say just a little set back.

RYM Experimentals
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Location: Fall City, Wa.
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Post by RYM Experimentals » Thu Feb 19, 2015 7:45 pm

Id go a little farther and put your setback at 35-50mm for that deck. Its a true powder deck so give it a good surf stance.

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