Sunday, December 20, 2009


 
 



Took like 15 minutes and tried out my new skis.  So fun.


Testing my new skis from nate myton on Vimeo.

Saturday, December 19, 2009

Skis


177cm 128-97-128mm
Just need to seal the sidewalls and drill the inserts out for my bindings.

Thursday, December 17, 2009

Pictures







WOOHOO!!!

Just pulled my first ski out of the press and put the second one in.  That will be removed tomorrow morning.
The ski looks great.   Pictures will follow.

Tuesday, December 15, 2009

A mad dash.

I'm nearing the finish.  Much has changed since my last post, but I haven't had time to document and upload it.  I've been quite busy trying to finish the skis before I leave on Christmas break, 7 short days from now.  I hope to press my first ski tomorrow.  Photos will come soon (unlikely).

Monday, November 16, 2009

Core

I've begun to work on the actual "make a ski" part of this whole process.  I laminated the core out of redwood and pine, with walnut sidewalls..  I chose redwood because I had a nice long piece of it with very straight, vertical grain.  Since the grain was already very regular and vertical I didn't cut it into small strips and re-laminate it as many builders do.  The core is one piece of redwood about 4" wide.  On either side of that is pine, and finally on the outside is walnut.  Pine was chosen since it was on hand and has a nice light color.  Walnut was chosen for the sidewalls because it was on hand, it's stiff and hard (hopefully will make for good impact resistance), and it has a nice dark color.  I glued it all together with wood glue.

The first step was to glue together the redwood and pine.




Next step was cutting it out to the correct dimensions for the ski, minus 1/4" all around for the walnut sidewalls to be attached afterwards.  This allows the sidewalls to follow the sidecut of the ski.  To cut the core I had planned to create a 1:1 scale printout of my design, cut out a Masonite template to match that, and then use that temple to route the actual cores.  My plan was thwarted by the fact that I was unable to make a really satisfactory template.  So I decided to make a nifty jig based on the one used by Michael from 333skis.  After a lot of trial and error and frustration I was successful.

Basically it's a 2"x4" spine with 1/4" slots cut with a dado blade.




 In the slots go shims cut from Masonite to the dimensions of the skis (minus 1/4" on each side to account for the rails).  The rails are also made from Masonite.  In the slots go shims cut from Masonite to the dimensions of the skis (minus 1/4" on each side to account for the rails).  The rails are also made from Masonite.  The shims keep the rails from moving inward..  There are also 9 piece of threaded rod that keep the rails from shifting out.  To determine the lengths of the shims I first cut the middle and end shims based on the desired dimensions for the skis.  Then I tighten the bolt in the middle and allow the Masonite to curve naturally into an arc.  Then I measure at each of the other slots and make shims that just fit.




Then I screw down the core and run the router along the rails.





After the core is cut to the proper dimensions I glue on the walnut sidewalls.

Quiver



Line 5-0 90cm
Revel8 Revolt Chicken 105cm
Spruce 120 120cm (dad's)
Vokl P40 170cm (dad's)
New Ski Template 175cm
dimensions for the new ski are 136mm-101mm-136mm, quite similar to the Spruce 120s but lengthened.

And I've had some trouble with my bladder.  It had a hernia.  I think air from the valve hole leaked between the layers of the hose.  It inflated into a big lump, then a tiny hole popped in it to let the air leak out.  I thought it was going to explode violently so I watched from behind a door.  I was able to cut off the damaged part and reattach my hardware.  Not the end of the world.  The hernia happened while I was testing it at about 60psi.  I plan to press at 35-40psi.  After the repair I've left it for 3 or 4 days at 35psi and it has lost all of 2 or 3 psi.  Very acceptable in my opinion.

Here's a photo of the inside of high pressure discharge hose, if you're interested.  Just a bunch of nylon strings running 0 and 90 degrees.  The actual hole from the leak was actually quite small.  I cut it open to look inside. As you can see the outermost layer of the hose lifted away from the core of the hose making a bubble.