Interpreting the pictures and your description it seems to be more likely that the foam itself was overloaded by the shearing forces. If there has just happened a delamination there wouldn't be much foam left on the laminate. Another option might be that the bonding wasn't deep enough - did you pain...

They use wet lamination. Generally there shouldn't be much exess resin when applying the resin correctly to the fiberglass. If you press out more then a few gramms per Ski you're applying way to much. You can find out the correct amount if you take the weight of the fiberglass you want to use and ta...

I'm interested in 100 pieces (10mm) if we can have a reasonable shipping price. As i'm in Germany maybe we can combine our orders Buuk (shipping to Europe together).

Yes - it's still the same ski - i just wanted to post my experiences with Airex once again as there seems to be more and more interest in using foam. I will go on using a mixture of airex and wood for my next skis that are currently in production. The picture shows the skis without topsheet. I used ...

You may use a partially capped construction (as Dynastar uses e.g.) with sidewall in the middle of the ski and capped at tip and tail. This provides strength at the edges where it's needed.

I've got an engineering degree in aircraft construction. Working with composites was allways my passion starting with model aircrafts about 20 years ago. During my studies i've been working with a company building gliders from composites with all kinds of fibers.

I use airex c 70.75 in the shovel area (first 20cm) of my current ski. It shows no signs of fatigue yet (after about 20 days hard skiing). You can see the airex here (green part): http://www.wildplaces.de/bilder/oben.jpg Airex has very small closed cells so it is not sucking a lot of epoxi. With an ...

A good source for buying cheap and high quality vacuum pumps is ebay - i bought mine for about 30 $. This is definetly the cheapest way to get a good press!

I'm using this type of pump:

http://www.knf.com/oemini.htm

You should use epoxy made for laminating puposes which is quite fluid. Alternatively you may use a thinner which is available for most epoxy resins. The easiest way to apply it to the fabric is a plastic scraper. If you've got epoxy with a long potlife you may use a paint-brush which is the way to g...

What about using carbon for the biax +/- 45° layer and glass for unidirectional? You can save a lot of weight compared to a glass ski, gain torsional stiffness an the ski is not as likely to fail due to torsional overloading. @kelvin: I'm using an airex core on my current ski in the tip area with no...

I would really like a sticker with "not made in China" and skibuilders logo for putting it on my skis! The edges logo is great but only for real insiders....

This is the way i repaired the sidewall after damages - but it not very strong. I would recommend to use a different wood (like Ash) for the sidewalls.

Take care - spruce is quite brittle - not suitable for sidewalls!

I just took it because it's cheap and easy available.

@hose-man:

i already presented the skis here:

http://www.skibuilders.com/phpBB2/viewtopic.php?t=177

As the ski has no camber it's a bit hard to answer your question - but it hasn't changed since pressing.

Yes - i used a layer of 160g/m2 laminated with black coulered epoxy. It works fine so far - surprisingly durable - no UV damages after roundabout 15 ski days.

You can use a uv resistant epoxy to be shure.