Ski Builders Forum

doughboy, i dont mean to be rude and //or arrogant.
but
i think you should read the journal. check out the first page i have written and showed there what my profile looks like and so on.

and about the rigidity of the skis, the revchem epoxy ( ACCORDING TO THE GUYS AT PLASTIC WORLD) say that this epoxy is extremely flexible and durable. they say that most people that use the c-whatever resin for hockey sticks. and i know my hockey sticks. hockey sticks are extrmely stiff when they need to be and super flexible when shooting. and they are actually made of 7 plys of carbon fiber.

just for example.



so im just preparing for the worst. but sixty dollars for a full roll of uniglass. i can definatley think of worst things to spend 60 dollars on

MontuckyMadman wrote:I guarantee at those core dims and sidecut dims the ski will be to stiff with an appropriate compression molding epoxy and 22oz triax.

So like 155-120-155?

YMMV

ohhhhh no that not that wide.

i thought you meant radius by underfoot.

no my ski is actually, here

Overall Length 1750
Running Length 1450
Nose Length 150
Tail Length 150
Nose Width 130
Tail Width 130
Waist Width 98.416
Sidecut Radius 16650
Sidecut Bias 0
Stance Width 550
Stance Setback 0
Nose Height 37
Tail Height 37
Camber 19
Camber Setback 0

130 in the tail at 3mm thick will be stiff, but if you are the baller you claim to be then you may get what you want.
so you are building a 130-99-130 symmetrical twin with 16M sidecut.

I suggest you at least put a bunch of 2x4's in the press and pump it up to 25psi so you can calc deflection and get more steel, or realize that you will only be pressing at 25psi which is fine its like a solid vacuum at sea level.

MontuckyMadman wrote:130 in the tail at 3mm thick will be stiff, but if you are the baller you claim to be then you may get what you want.
so you are building a 130-99-130 symmetrical twin with 16M sidecut.

I suggest you at least put a bunch of 2x4's in the press and pump it up to 25psi so you can calc deflection and get more steel, or realize that you will only be pressing at 25psi which is fine its like a solid vacuum at sea level.

oh i forgot to mention this, but i finshed my top molds today.

and i inflated the press to 20 psi only at 15 the not welded in pieces popped out. so as of today. i am even more confident witht he press

a.badner wrote:
and i inflated the press to 20 psi only at 15 the not welded in pieces popped out. so as of today. i am even more confident witht he press

WTF are you saying? If you can't FAWKING speak in a normal manner and look at what you are saying you are worthless!

Your a total meatball aren't you?

what i meant to say was, when i inflated the press to 20 psi, the parts that are not welded in. popped out of their slot.
i thought they would pop out as soon as i started inflating.

HHmmm... nothing should be popping out. The press must be flexing for things to be popping out. What exactly popped out? Is it the cross members that sit in the angle iron? I hope not.

a.badner wrote:what i meant to say was, when i inflated the press to 20 psi, the parts that are not welded in. popped out of their slot.
i thought they would pop out as soon as i started inflating.

Jesus, at 20 psi things popped out and you're declaring success? No good can come of this. More props to your free health-care, you may need it

What pressure are you planning on pressing at? I agree with Montucky, put some 2x4's in there and pressurize it up to what you plan on pressing at (plus maybe 10psi more to make sure you have buffer). In fact I would give it a few cycles, pressurize it, let it sit for ~30 minutes maybe, deflate, re-inflate, repeat a few times. You don't want to do your first full inflate when you layup for first ski.

Would be really frustrating to put in all that hard work, mix up the epoxy, layup the ski, then have the press fail on you. Base, edges, nicely profiled core all wasted You can never do too many dry runs.

(PLEASE be safe... things "popping out" at 15psi scares the crap out of me)

I gotta say though, your hockey stick cattrack is pretty slick, that was a great idea. I kinda want to start searching for old composite hockey sticks now (I still don't press with a cat track, and want to)

........

sure this is an old picture. but

the long 2by6 s at the top are not welded in. same as the ones at the bottom.

at twenty psi, the hose almost completely inflated, just not pressurized, pushed agaisnt the top mold enough to push out those two by 9's, which are just sitting.

the cross sections hold them in place during a real set-up/inflation.

Obviously they will be weld in at some point....... right?

You're in for heart-break dude. Don't say we didn't warn you.

What you've just told me is that your angle iron frame is taking none of the load, your side supports are taking none of the load. Basically you have some long 2x6 beams that sit on top of that, the top mold pushes on those 2x6s, with some shorter bars going laterally, and that's it.

By "popped out" you really mean the hose just lifted them, since they are in no way fixed to anything. Is that correct??? They just sit on top?

I'd say buy a welder and go to town on fixing every single piece of metal with a good bead, as you certainly arent afraid to try stuff out yourself and learn... but dude, dont waste your money. You really need... a new press?

And yeah, if stuffs popping off at 15 PSI, dont celebrate. Please be out of the room whenever you're inflating this....

Too much stiffness (i.e. adding supports and welds everywhere) can be just as bad as not enough. If you over constrain your press it can not flex at all....



It looks like you used some angle iron and some old pallet racks (industrial shelving). You are going to hurt someone with that setup, take a step back and listen to the advice here.


BTW, while you were busy sending me rude and harassing messages about buying shit from me, I was moving and working 60 hour weeks as an engineer. Sorry I didn't respond, but glad I didn't contribute to this fiasco.

My $0.02