Search found 40 matches

by feldybikes
Mon Jul 12, 2010 5:19 am
Forum: Ski/Snowboard Design and Layup
Topic: Why does DPS use a Carbon Pre-Preg?
Replies: 32
Views: 9152

The following comment is entirely opinion without all that much real knowledge, but I gotta believe that on some level, the prepreg stuff from DPS is marketing. Now, I didn't say marketing BS. I buy the opitimum resin ratio blah blah, but I also figure that if the carbon manufacturer can get the rig...
by feldybikes
Mon May 10, 2010 11:26 am
Forum: Journals: Log Your Ski Building Progress
Topic: Getting started!
Replies: 323
Views: 130899

http://farm5.static.flickr.com/4059/4567028461_56ebd4c93f_o.jpg PID control box. Finished wiring. Made a few idiot proofing labels. Now need to decipher the algorithms to program the heating profile. Man, those labels are seriously askew. I don't know how well your skis are going to turn out. :D In...
by feldybikes
Wed Dec 09, 2009 8:26 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Thermocouple question
Replies: 42
Views: 15412

AFAIK, thermocouple type (J, K, etc) refers to the metals used in the TC and not the shape. Your TC reader may or may not be able to read more that one type. I don't know if the TC will leave an indentation or not, but I don't see a huge problem with putting it on the top side of the heat blanket an...
by feldybikes
Sun Oct 25, 2009 8:03 am
Forum: Materials and Supplies
Topic: fiberglass and carbon proportions O_O!
Replies: 66
Views: 34699

I guess. I don't mean to sound flip, but I don't really know what it really means for a ski to be snappier or have more pop. I just haven't skied all that many different skis and very rarely have I ever skied two different skis back to back. But I gather these things are pretty much the same?
by feldybikes
Fri Oct 23, 2009 7:34 pm
Forum: Materials and Supplies
Topic: fiberglass and carbon proportions O_O!
Replies: 66
Views: 34699

I still think that yes, if you have a carbon fiber beam and a fiberglass beam of the same stiffness, they will rebound the same. I could still be missing something though... [physics geek] Almost, for a spring, F = -kx where k is the spring constant (i.e. stiffness) and x is the displacement. So th...
by feldybikes
Fri Oct 23, 2009 7:38 am
Forum: Ski/Snowboard Design and Layup
Topic: How far back for mounting point
Replies: 3
Views: 1392

Thanks for the reply. I guess I should've reworded at least the title. I was referring more to methodology for designing the mounting point rather than finding it on an existing ski. The chord center method has nothing to do with the sidecut of the ski. I'm guessing it works out because most skis ar...
by feldybikes
Thu Oct 22, 2009 7:21 pm
Forum: Ski/Snowboard Design and Layup
Topic: How far back for mounting point
Replies: 3
Views: 1392

How far back for mounting point

So, If I go into the how to section, it suggests making a single arc. If the tips are wider than the tails, the narrowest point (and hence mounting point? -- correct me please if I'm sorely mistaken) would be back of center. If the tips and tails are the same width, the narrowest point is exactly on...
by feldybikes
Tue Jun 09, 2009 6:54 pm
Forum: Yard Sale (non commercial)
Topic: Base Material
Replies: 14
Views: 5375

(potentially) stupid question: is it all one piece?

If so, I'll do it for $75. I live in Colorado. PayPal?
by feldybikes
Tue May 19, 2009 7:16 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Vacuum bagging at altitude?
Replies: 3
Views: 3437

Thanks for the replies
by feldybikes
Sun May 10, 2009 6:00 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Vacuum bagging at altitude?
Replies: 3
Views: 3437

Vacuum bagging at altitude?

Howdy, Just ran across this site about a week ago. Before finding it, I had thought about building my own skis from time to time (I build my own bike frames), but I didn't think I had the background in skiing to know how to design a ski layup when it came to # of layers of fiberglass, core thickenss...