Search found 88 matches

by nate
Tue Nov 17, 2009 6:14 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: need to bounce some ideas...
Replies: 17
Views: 9875

I'd be inclined to think you'll need another hose. Not entirely necessary though I suppose. If you're confident in your cat track's strength you could press things wider than your hose. You'd just have to up the pressure in the hose to get the same pressure on the laminate. Oh, and and as far as cat...
by nate
Tue Nov 17, 2009 3:15 pm
Forum: Ski/Snowboard Design and Layup
Topic: Vacuum bagging AND pressing for cap construction?
Replies: 28
Views: 27753

At first I thought that was a really skinny snowboard.
Haha, nice work though. I like your graphics. Where'd you get them, if I might ask?
by nate
Tue Nov 17, 2009 3:08 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: need to bounce some ideas...
Replies: 17
Views: 9875

Keep in mind a 6" hose will lay flat at 9.5" or so.

Multiply the diameter of the hose by .5 pi (which is 1.57) to get its width flat.

Hockey sticks is a clever idea for cat track.
by nate
Mon Nov 16, 2009 8:10 pm
Forum: Ski/Snowboard Design and Layup
Topic: Running length vs effective edge - conversion
Replies: 45
Views: 26395

Ok, so I thought about this some more and messed with some numbers. Taking the specs for the Line Anthem (symmetrical so it's easier) @178cm: 119-93-119 18.5m turning radius 1483mm "surface" (I interpret as running length) The effective edge is 1485.28cm. Ie 2.28cm greater than the running...
by nate
Mon Nov 16, 2009 6:56 pm
Forum: Ski/Snowboard Design and Layup
Topic: Running length vs effective edge - conversion
Replies: 45
Views: 26395

Yes, there is a mathmatical way to compute effective edge based on running length and sidecut radius. Or vice versa. I couldn't tell you what it is. But it exists.
by nate
Wed Nov 11, 2009 11:34 am
Forum: Ski/Snowboard Design and Layup
Topic: Environmentally Friendly Snowboards and Skis
Replies: 40
Views: 23131

I just ordered a batch of the Supersap 100/1000 3 qt system. Looking forward to trying it out on my first pair of skis.
by nate
Tue Nov 10, 2009 7:18 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Goat-Ham-Ah project
Replies: 133
Views: 88184

My opinion isn't valid since I haven't tested it yet, but I'm going to use contact paper to protect the bases of my skis.
Ie this
It's like tape, but it's 18" wide and not quite as sticky as packing tape.
by nate
Tue Nov 10, 2009 5:14 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: What is the best press to make for the least $?
Replies: 39
Views: 16264

MontuckyMadman wrote:Yeah I am using a military parachute stitch technique now.

Doughboy knows how this force is calculated.
What kind of thread are you sewing with?
by nate
Tue Nov 10, 2009 3:22 pm
Forum: Ski/Snowboard Design and Layup
Topic: securing base material to the mold in a heated press?
Replies: 14
Views: 6677

twizzstyle wrote:Hot glue should keep it in place until you've got it fully under pressure, then you can ramp up the heat.
and then the hot glue will re-melt and cover the entire base in a thin sticky layer. [/speculation]
by nate
Tue Nov 10, 2009 2:04 pm
Forum: Journals: Log Your Ski Building Progress
Topic: A new ski is here! A new ski is here!
Replies: 10
Views: 8335

An alternative to the dowel method that is using a couple inserts. (if you're using inserts already) Just superglue down 2 of your inserts to the base material before layup, then when you go to layup you can just slide the holes in the core over the inserts. Basically the same as the dowel method bu...
by nate
Sun Nov 08, 2009 8:09 pm
Forum: Ski/Snowboard Design and Layup
Topic: paper printed topsheet - resin seeping through?
Replies: 3
Views: 1980

I'd be wary about using photo paper the full length of your ski. A small logo probably isn't an issue, but I think full length might cause delamination. I don't imagine the epoxy bonds well to the glossy side of the photo paper.
by nate
Sat Nov 07, 2009 11:17 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: What is the best press to make for the least $?
Replies: 39
Views: 16264

I spoke to a friend of mine who is a mechancial engineer. He said that he thought that I shouldn't multiply the cloth width by two. He also said that it is necessary to account for the surface area of your hose pressing both up and down. Ie. none of the calculations I posted earlier are even remotel...
by nate
Tue Nov 03, 2009 4:33 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: What is the best press to make for the least $?
Replies: 39
Views: 16264

Can anyone confirm if you're allowed to count the fabric on both sides of the press into your calculations. Ie if you have a 8' long bag of cordura wrapping your press, and you say that cordura has a strength of 500lb/in of width(this isn't a true figure), is your strength 96x2x500 to account for th...
by nate
Tue Nov 03, 2009 4:22 pm
Forum: Ski/Snowboard Design and Layup
Topic: What should I use for my clamp press?
Replies: 2
Views: 1920

I'm not going to try to convince you what method to choose, I'll let someone else give advice there. Here's a thread from someone who used clamps. http://www.skibuilders.com/phpBB2/viewtopic.php?t=1632 I recommend you read as many of the threads in the Journals section as you can. It'll help you dec...
by nate
Tue Nov 03, 2009 2:17 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: How much pressure can you expect from a pneumatic press?
Replies: 9
Views: 5283

I am quite curious about this. I tend to think you don't need to multiply by two, but I have no proof either way. I'd love to hear something decisive.