Search found 148 matches

by Buuk
Wed May 23, 2007 7:52 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Ski Press Concepts
Replies: 8
Views: 8212

But what's the material of the press? Or did I miss something?
by Buuk
Wed May 23, 2007 12:39 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Ski Press Concepts
Replies: 8
Views: 8212

Lightweight??
by Buuk
Sat May 19, 2007 4:49 am
Forum: Journals: Log Your Ski Building Progress
Topic: Buuk's ski building journal!
Replies: 34
Views: 37260

Well, what did I do during the long time that I didn’t post anything at my own ski building journal? Of course I tested my first pair of homebuild skis! They were a bit soft with 10 mm under the boot and a 600 gr/m^2 fibreglass layer on top and bottom, but the skied fantastic! Furthermore when I saw...
by Buuk
Sun Apr 29, 2007 1:20 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Buuk's ski building journal!
Replies: 34
Views: 37260

I finally added some comment to my above post.
I will add some more general comment, and how they ride and what I will do in a different way next time later!

Buuk
by Buuk
Sat Apr 28, 2007 1:06 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Buuk's ski building journal!
Replies: 34
Views: 37260

Yeah, too busy with a lot of things... sorry! They skied pretty good, but were a little too soft, but it was a fantastic experience to ski on my first pair of homebuild skis! :) Last time I have been busy doing some calculation on the ski stiffness etc. as some of you know. Just finished some update...
by Buuk
Wed Apr 25, 2007 5:06 am
Forum: Test and Trip Reports: How Did They Work?
Topic: Mon Blanc 23 april '07
Replies: 5
Views: 6109

Very nice story!
I also love the French Alps :)
by Buuk
Tue Mar 27, 2007 3:51 pm
Forum: Journals: Log Your Ski Building Progress
Topic: plywood`s ride - the beginning
Replies: 46
Views: 47632

Just read the entire topic. You made a pair of very nice skis Plywood!! And very interesting method of creating your own heat blanket! Keep up the good work! :) Hope to try this heating method for my own press soon for my next pair of skis.

Buuk
by Buuk
Fri Mar 23, 2007 2:10 pm
Forum: Ski/Snowboard Design and Layup
Topic: Core profile
Replies: 9
Views: 6817

Bambi, as you can read in the post about the deconstruction of the Dynastar troublemaker, the glassfibre layer is about 1 mm thick for biaxial fibre of probably 600gr/m^2 (22 oz right?). It might be that this thickness differs from the composite thickness when building your own skis because in ski i...
by Buuk
Fri Mar 23, 2007 12:45 pm
Forum: Ski/Snowboard Design and Layup
Topic: Dynastar Troublemaker deconstructed
Replies: 4
Views: 4747

Dynastar Troublemaker deconstructed

This afternoon I met someone (Dirk) from a Dutch ski forum who is doing a course on evolutionary product development for his study industrial design at Twente University of Technology (The Netherlands). For this he deconstructed a Dynastar Troublemaker ski, below you see the layup around the binding...
by Buuk
Sun Mar 18, 2007 11:45 am
Forum: Ski/Snowboard Design and Layup
Topic: ski geometry and weight
Replies: 7
Views: 8757

Great and very usefull info. Thanks Endre!

Buuk
by Buuk
Sat Mar 03, 2007 11:13 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: wooden press need help
Replies: 8
Views: 7925

Hi Setto, I think the wooden beams will be able to hold a very high pressures. But I am concerned about the connection point of the threaded rod to the wooden beams. I am not sure if the wood will be able to resist the high stresses that oocur there. Also wood is a very unpredictable (non homogeneou...
by Buuk
Sat Feb 24, 2007 8:39 am
Forum: Ski/Snowboard Design and Layup
Topic: MatLab ski calculation
Replies: 19
Views: 17074

Yesterday I added base material, edges, sidewalls and deflection due to shear to my MATLAB ski model (and made the code faster). As expected this makes the model a lot stiffer. I also noticed that the shear is neglectible compared to the bending deflection. I will post the new MATLAB files later on....
by Buuk
Sun Feb 04, 2007 4:07 pm
Forum: Ski/Snowboard Design and Layup
Topic: MatLab ski calculation
Replies: 19
Views: 17074

I did write my own simple FE code in Matlab, I did build it as you can read above. About the load, the load is a line load, so it should be in N/mm. This is only an error in the text in the uploaded pic. Thanks! I did just put some load on the ski to test it. See te loads below (also in N/mm): Ptipb...
by Buuk
Sun Feb 04, 2007 8:01 am
Forum: Ski/Snowboard Design and Layup
Topic: MatLab ski calculation
Replies: 19
Views: 17074

We use Matlab a lot at university, it's a great tool! I'm a fond of open source software as well, but I prefer Matlab because I am used to it and I can get it for free at my university. Another alternative open source program is Scilab http://www.scilab.org/ For the FEA model I simply used a 1D beam...
by Buuk
Sun Feb 04, 2007 6:15 am
Forum: Ski/Snowboard Design and Layup
Topic: MatLab ski calculation
Replies: 19
Views: 17074

MatLab ski calculation

Hi there, After a great post of Bambi a while ago about an Excel sheet to calculate the stiffness / deflection of a ski I was inspired to work on this as well. Last weeks in my free time I have been working on some MatLab code to show the following: - Ski contour - Ski profile - 3D view of the ski c...