Search found 175 matches

by SleepingAwake
Sun Oct 22, 2017 10:51 am
Forum: Journals: Log Your Ski Building Progress
Topic: Back and looking forward to building!
Replies: 22
Views: 15397

Some cool ideas coming out simply by someone wanting to try somethung different, that's cool. I would email the info desk at Henkel, they have always really gone out of their way when i have had a question for them. They might have a VOC free option. I have always thought that VOC free epoxy had a ...
by SleepingAwake
Sat Oct 21, 2017 1:53 am
Forum: Journals: Log Your Ski Building Progress
Topic: Back and looking forward to building!
Replies: 22
Views: 15397

Hey guys I work quite a bit with entropy resins, and while I generally like their products a lot I would like to point out that it is still an epoxy and the source of the raw materials doesn't mean it's any better for your health. But with proper handling epoxies are really pretty safe to use and gl...
by SleepingAwake
Sat Oct 14, 2017 9:53 am
Forum: Journals: Log Your Ski Building Progress
Topic: Divide Rides
Replies: 332
Views: 207267

Weird thing is though.....the running length was affected more than the tips. I figured it would be the other way around as there is less wood thickness for glass to offset it the tips? This looks mint! and I actually really like the blodgynes :) Regarding the spoon - I would assume that the temper...
by SleepingAwake
Thu Oct 05, 2017 7:55 am
Forum: Journals: Log Your Ski Building Progress
Topic: 13 SKIS Building proces
Replies: 20
Views: 18249

I strongly disagree with that and I know of a few cases where this lead to problems. You generally try to have a smooth transition in stiffness in order to avoid shear stress on the interface. So always core to biax to UD. If you want to have the UD against the core I would recommend putting a very...
by SleepingAwake
Thu Oct 05, 2017 1:22 am
Forum: Journals: Log Your Ski Building Progress
Topic: 13 SKIS Building proces
Replies: 20
Views: 18249

I strongly disagree with that and I know of a few cases where this lead to problems. You generally try to have a smooth transition in stiffness in order to avoid shear stress on the interface. So always core to biax to UD. If you want to have the UD against the core I would recommend putting a very ...
by SleepingAwake
Wed Oct 04, 2017 6:31 am
Forum: Journals: Log Your Ski Building Progress
Topic: 13 SKIS Building proces
Replies: 20
Views: 18249

I do not understand what's going on in your second picture, could you elaborate?
by SleepingAwake
Tue Aug 29, 2017 2:11 am
Forum: Ski/Snowboard Design and Layup
Topic: Ski stiffness change with width
Replies: 8
Views: 10716

So i quickly run a calculation in my calculation programm. This depends on the Layup and core so those values here are not 100% exact, but the difference is probably smaller than your production tolerances (no offense ;)) In general the stiffness is linear dependent of the ski width. So a 20% wider ...
by SleepingAwake
Sat Aug 26, 2017 11:56 pm
Forum: Ski/Snowboard Design and Layup
Topic: Carbon and Flax Fiber Layup
Replies: 8
Views: 8241

The fiber volume content you get with a flax fabric depends hugely on the fabrics architecture. With the stitched biax or the uni fabric from bcomp the fiber volume ratio is quite good. It seems tho that you need a lot of resin as well, as the density of flax is so low. So a fabric with 350gsm is ju...
by SleepingAwake
Fri Aug 04, 2017 5:32 am
Forum: Ski/Snowboard Design and Layup
Topic: colouring resin
Replies: 2
Views: 3106

Hey guys I have to agree that colored resin to laminate the carbon fiber will not nearly be enough. I would paint the back of the topsheet with a white epoxy based paint. This worked really well for me in the past, but make some adhesion tests first. I had to press the skis while the paint was still...
by SleepingAwake
Thu May 18, 2017 2:34 am
Forum: Materials and Supplies
Topic: Coated fiberglass?
Replies: 12
Views: 9415

It's kinda hard to see but it might be a very thin PA mesh that is applied to stabilize the fabric. This helps a lot to maintain the fiber angle for a biax fabric during handling.

cheers, Reto
by SleepingAwake
Thu Mar 23, 2017 6:24 am
Forum: Journals: Log Your Ski Building Progress
Topic: Fjør Skis
Replies: 2
Views: 3922

Sweet, looking forward to see all of that.
by SleepingAwake
Thu Mar 16, 2017 1:47 am
Forum: Journals: Log Your Ski Building Progress
Topic: WRONG 2017
Replies: 63
Views: 44511

Interesting point, I had made him the board for free, not even cost of materials. He had just split up with his Fiancée and I thought it might help him take his mind off things and move forward. The thanks you get eh HAHA. I'll still cut out the edge and repair it if he brings it around, mainly ju...
by SleepingAwake
Tue Mar 14, 2017 11:23 pm
Forum: Journals: Log Your Ski Building Progress
Topic: In the press today - as Swiss as it gets :)
Replies: 36
Views: 25289

I built my last couple of skis with biax flax and unidirectional glass or carbon and this makes for a really nice calm ski. Probably not what you want in a race ski, but wonderful in a freeride ski.
by SleepingAwake
Mon Mar 13, 2017 11:54 pm
Forum: Journals: Log Your Ski Building Progress
Topic: In the press today - as Swiss as it gets :)
Replies: 36
Views: 25289

Yes with a thicker core the skis might have the stiffness, but with very thin composite face sheets the strength might be critical. Strength and stiffness are not related. Or not necessarily at least. But if you had good results with similar layups in the past then is all good! If it ain't broke don...
by SleepingAwake
Mon Mar 13, 2017 12:52 am
Forum: Journals: Log Your Ski Building Progress
Topic: In the press today - as Swiss as it gets :)
Replies: 36
Views: 25289

woah that is a very thin layup. The biax glass layer doesn't do much when its not balanced above and below the core. So it won't make a huge difference, especially as you combined it with carbon that is so much stiffer than the glass.