it`s just absolutely totally insane what`s happening this year. we got snowheights NEVER EVER measured before in november. my homeresort has 60cm at the bottom and 150cm on top (1850m over sea). this is more than we had through the whole last season! :D :D :D :D :D :D :D :D :D unbelievable. there i...

... then a large second mode means that the ski could possibly loose edge hold -- that is, edge contact between the tip and the waist. likewise, the same might be true between the waist and to the tail. i'm not sure if i'm making any sense.... You are right, but probably the amplitude of the first ...

BigKam: I talked to the guy who did the measurements about one year ago, and I stepped in the article few weeks ago, just by chance. If I remember well, the first mode has one nodal point, aroud mid-ski, while second mode has two nodal points, about 15/20 cm from tip and tails, and so on. They say t...

Mikkelsen is right. Stregth of carbon fiber in compression is about the half than in tension, but Young modulus (stiffeness) is about the same. Carbon placed above the core will break easily. http://www.torayca.com/techref/en/images/comp02.html Since few years, special carbon fibers with high compre...

Here are some useful information on ski vibration.
http://www.ansys.com/magazine/issues/1- ... s-edge.pdf

Keep in mind that high frequencies are good, and only low frequencies vibrations (below 100 Hz) should be damped.

I made some prepreg this summer. I was working on a carbon fiber telemark boot, and I found out was quite difficult to impregnate the tissue on a 3D shape with the brush. I did exactly what you said: I impregnated the carbon tissue, sandwiched between two release films, and put under vacuum for time...

Just moved to Japan.
All my equipment is in Europe of course.

Anybody is making skis here?

Boiling water is fine. Cook tips for few minutes, than bend them.
http://aeg.isuisse.com/LabDavos06/Davos06.html

Hot tap water is not really enough: wood loose some bending afterwards.
http://forum.powdermag.com/photopost/da ... rebend.jpg

Thanks, that is what I was asking. Actually I did not notice your mistake...

If you have an pick-up (electric guitar) around you can attach a pice of iron on your strip, and use the pick-up to record the oscillations...

What do you mean by dampening? Does it sound more low pitch than the glass sample?

I think that heating is the best way to obtain a good resin penetration (it gets more fluid). Actually I made all my skis at low temperature, and I got no problems. I read few days ago a paper by some researcher in Australia, who showed that carbon composite parts made at low pressure in water-heate...

G-man, thanks for your test. I made a pair recently using base with the non treated side and I had in mind to do some stone griding to improve the structure, but it looks like the little grooves barely visible on the smooth surface are working great. I should go testing them soon. I took few more pi...

We also tried cutting them out with a Japanese hand saw. As Yoshi is doing below. This didn’t take much longer and didn’t really do any damage to the saw. Right, the ryoba works great. I usually use a kataba "meiko". http://aeg.isuisse.com/usine/kataba%20meiko.jpg http://aeg.isuisse.com/u...

By calculations and experience, glass can be replaced by carbon weighting one third, that is 400 g/m2 UD glass can be replaced by 150 g/m2 UD carbon in order to obtain the same stiffness. This holds in tension (bottom layer). In compression carbon is only slightly better than glass, so it would be b...