If you wanna have a less stiff ski without sacrificing strength you can make the ud bottom laminate lighter than the one above. Makes quite a big difference in stiffness. And I might help you out with the composite calculations to get exactly the same flex as one of your fg boards. If you're interes...

Epic fail: printed the wrong version of the design which wasn't mirrored and realized it just now when it is too late to redo the whole story...




... Shit happens... Cheers, Reto

carbon uni and flax will be a very cool combo for a light weight ski, not too damp and not too nervous...

Not sure if i get that right or not, but you planed to use just the biax flax as reinforcement without a uni layer? Because the biax is usually used to control torsional stiffness, and with 350gsm flax it will be already stiff with a single layer (one above, one below the core - obviously)... I woul...

So, cores are milled In the making: http://home.rega-sense.ch/arnold.aebischer/nit_swisskiters/reto/Ski/018.jpg Tip spacer: http://home.rega-sense.ch/arnold.aebischer/nit_swisskiters/reto/Ski/019.jpg Hardpoint for the binding: http://home.rega-sense.ch/arnold.aebischer/nit_swisskiters/reto/Ski/020.j...

The main advantage of flax is its ratio stiffness per weight. As stiffness is about the same as glass fiber, but at half the density, its about double as good as glass. So I would use flax where ever a ski is designed for rigidity - so for torsion then. And basalt is as natural as fiber glass. They ...

this is a shop i would kill for

1) According composite theory it is better to put the biax layer on the core. Like that you have a smoother transition in the stiffness of each layer. And if your core is too thin then this is another reason to do so, because the fibers at 0° will be further away from each other. 2) Rubber on UHMWPE...

You can get the cores directly via Bcomp. These cores are test planks which can be ordered without any minimum quantities. They cost around 15€ a piece (piece, not pair). These cores make quite a difference in weight but they are a little tricky to machine... And thanks for the remark with the base....

For the moment it's just a standard balsa core made from end grain and flat grain balsa with flax fiber shear-webs. But once the core is profiled I'm going to mill a pocket below the binding and put a birch-plywood reinforcement in there.

so my thread was already quite far down, time to show some progress. But things go on slowly because my shop is not where I live... But I managed to make all the templates for my fatties: http://home.rega-sense.ch/arnold.aebischer/nit_swisskiters/reto/Ski/013.jpg Cut out one base: http://home.rega-s...

@Richuk
Of course the main reason for a stringer core is to obtain something more homogenous. But you don't change that by much if you take 2mm stringers instead of 5mm or so. And I don't think they use epoxy for glueing - I would bet on PU, what indeed makes it tougher!

This is pretty standard in ski industry to have cores made of about 3mm wide strips! I guess it is easier to produce - like that they can use veneers instead of planks, so they can produce much bigger blocks without having troubles of putting one plank next to the other in order to get the with need...

I think what Twizz wanted to know is what type of topsheet material you're using (i.e. manufacturer and model). And I kinda want to know that too ;) Ah sry, I didn't get that. Honestly I have no clue what kind of top sheet that is. Its just something which was laying around here... For me it feels ...

its the layup I planed for the ski, I'm not even sure if I mentioned it before: Topsheet epoxy paint UD Fiberglass Biax flax fiber then the core and flax and fiberglass again. Flax is a natural fiber with more or less the same stiffness as fiberglass at half the density. I probably going to produce ...