Twizz 2011/2012

twizzstyle · Post by **twizzstyle** » Sat Nov 19, 2011 6:27 pm

Won't be hard, you snowboarders are easy targets, just lying around on the snow most of the day.

...knuckledraggers *shakes fist*

Brazen · Post by **Brazen** » Sat Nov 19, 2011 6:30 pm

Hater

skidesmond · Post by **skidesmond** » Sat Nov 19, 2011 6:33 pm

Nice skis Twizz! Nothing like taking a new set of skis out for their first run. Man I wish we had some snow here!

doughboyshredder · Post by **doughboyshredder** » Sat Nov 19, 2011 6:47 pm

Brazen wrote:So hey twizz, I don't often ask favors of people, but the next time you see DBS would you mind yanking his pants down when you get off the lift?

hahahahahaha

Bwaaahaahaa, gotta catch me first. LOL.

Good to meet you to twizz. Skis looked beautiful.

twizzstyle · Post by **twizzstyle** » Sat Nov 19, 2011 9:45 pm

doughboyshredder wrote:
Bwaaahaahaa, gotta catch me first. LOL.

Good to meet you to twizz. Skis looked beautiful.

Thanks dude! Once alpy opens, chinese downhill from the top, it's on :p

vinman · Post by **vinman** » Sun Nov 20, 2011 5:51 am

They look nice twizz. I like the green base and sidewall. The bamboo veneer looks sweet too.

twizzstyle · Post by **twizzstyle** » Mon Jan 16, 2012 4:08 pm

So after doing this for a couple of years, I had my first catastrophic failure of a home-built ski.

Landed WAY backseat off of a big drop at Hyak today, had a bit of a spill. Got back on the lift, then Kevin pointed out that my top sheet looked a little funny. Upon closer inspection we saw this...

Of course, the conditions were way too good to give up, so I kept skiing for another ~2 hours or so, this ski was just VERY soft in the tail

Now the mode of failure was actually the bamboo core that broke, not a real delamination of layers. The bamboo I used for these skis was a little different than the normal stuff I use. They were flooring boards like usual, but had a middle layer of bamboo with the grain running laterally instead of longitudinally. If you can imagine the profiled core, in the center of the ski where it's thickest, the bamboo fibers are longitudinal... as it gets thinner, you get to the middle layer with lateral fibers... then as it gets thinnest towards the tips, it's back to longitudinal fibers. The failure happened where the fibers are lateral, I think it's kind of crappy bamboo, the grain is very loose, and it just tore. Lesson learned, don't use that bamboo!

Only got 3 days on these skis, and they've been epic, so I've got to make a new pair as quickly as I can. Nothing wrong with excuses to make more skis!

sammer · Post by **sammer** » Tue Jan 17, 2012 9:23 pm

Ya know since I started hanging out here that's the first broken ski that I can remember.

Shouldn't be too hard to build another with a better quality core.
I think you have a bit of a quiver to keep you skiing in the meantime

sam

Sherpa Burns · Post by **Sherpa Burns** » Tue Jan 17, 2012 10:06 pm

So, were you using the bamboo ply that is the 3 layer cross laminated stuff?

Sherpa Burns · Post by **Sherpa Burns** » Tue Jan 17, 2012 10:10 pm

And those bright green sidewalls look very familiar. I think I still have a sheet of it.

twizzstyle · Post by **twizzstyle** » Wed Jan 18, 2012 7:28 am

Sherpa Burns wrote:So, were you using the bamboo ply that is the 3 layer cross laminated stuff?

Yes. They were flooring boards, but they had a middle layer with the fibers running laterally. The middle layer also seemed to be a very loose grain, almost like it was crap bamboo and that's why they used it as a core. I should have known better...

Picked up more bamboo yesterday, the plan is to make another pair identical to these. I've still got some of the green sidewall left too

rockaukum · Post by **rockaukum** » Fri Jan 20, 2012 10:55 am

An thus the "invention" of rocker.
ra

twizzstyle · Post by **twizzstyle** » Sun Jan 22, 2012 6:38 pm

rockaukum wrote:An thus the "invention" of rocker.
ra

HAHAHAHAHAH

Did a little work today and yesterday after skiing... got the cores cutout for the replacements for the broken skis, tomorrow I'll epoxy on the sidewalls.

I'm working on a new all-mountain ski - I basically took the last bamboo-veneer skis I did, and made the tip and tail wider. Looks like an awesome ski! I got the cores cut out and epoxied the sidewalls on tonight. Thinking I might be ready to press a couple of skis next weekend.

vinman · Post by **vinman** » Mon Jan 23, 2012 4:42 am

What epoxy do you use to attach your sidewalls? Do you heat cure this? If so how do you clamp it and do the clamps get in the way of the heat blankets?

I've been thinking about using epoxy instead of PU glue but the lonny cure times and the clamps being in the way of the blankets have deterred me. I was thinking of building a full length sidewall clamp jig thing but haven't had the motivation since I'm not actively building during ski season.

twizzstyle · Post by **twizzstyle** » Mon Jan 23, 2012 6:34 am

Yep, I'd love to use the heat blanket, but the clamps get in the way

I use the same epoxy I do for the layup (using supersap for this pair), and once it's clamped up I use a heat gun to get things nice and warm. After 24 hours it's cured enough to take the clamps off (at least this worked the last few times I did it... I'll see this evening if it worked). Then I'll remove the clamps and lay it on the heat blanket at a low heat (something like 130deg F) to post-cure it a little more. I'm not too worried about it being completely cured, that can happen during the layup, as long as it holds well enough for profiling (which it never does)

Ski Builders Forum

Ski Builders Forum

Twizz 2011/2012