sincerely
a 17 year old trying to have fun.
re-stiffening
Moderators: Head Monkey, kelvin, bigKam, skidesmond, chrismp
re-stiffening
Alright, so I'm on to my third pair of skis and the first two have been ridable but definitely much to improve on. This third pair everything looks good and visually how i wont it, but i have a feeling i didnt use enough hardener and the skis are literally noodles in the tips and tails. The centre is nice because of the thickness of the core but the tips and tail are just stupid. I wanted flexy park skis to butter and jib around but i can probably bend them a solid 90 degrees. So this i where i come to you. is there anyway to re stiffen/ or somehow magically make them stiffer in the tips and tails just to make them somewhat ridable or should i just say screw and hope for the best with them as they are. I know they're going to be retarded i'm going to shred them anyways. So, ski building gurus, can you help me.
sincerely
a 17 year old trying to have fun.
sincerely
a 17 year old trying to have fun.
core is 2-10-2 ash and poplar mix, with UHMP sidewalls, with one layer 22 oz tri-ax fiberglass on either side of the core, I used west systems as i'm not using heating blankets etc. they are 111-88-111 dimensions with a bunch or early rise in tip and tail. I may have to try that sprit apart idea, I'll search it thanks. any other help/ideas would be delightful
I think the core profiling thing is a hard one to describe.
10mm at the thickest point down to 2mm doesn't really say a whole lot.
Any flat spot or is it 10mm straight taper to 2mm or is the taper convex/concave?
I've been doing convex or rounded taper, the last few pair have been flat (around 11.5mm) in the binding mount area tapering to 2mm.
It doesn't take much core thickness to make a huge difference in flex, so if its 2.5mm 10 cms from the tip vs 2.8 it will make quite a change in your flex.
As far as changing the flex characteristics of the finished ski...
I'd say just ski on them as they are, it's a lot of work to grind them down and make them stiffer. ( a little less work to make them softer)
Start again and chalk this pair up as a learning experience.
Next pair might come out too stiff but then you'll have a bit more experience for the next pair!
This whole thing is just one big learning curve!
Resin to hardener ratio is very important. Buy yourself a good scale and follow the recommended mixing ratio.
Mix small batches and after you've stirred the 5hit out of it, (scraping the sides) pour it into another cup and stir it again. Then your ready to put that in your ski.
If you mess up the ratio your epoxy won't ever set, and any resin or hardener that hasn't been mixed in properly will stay gooey forever.
Good on ya, only 17 and you have a huge jump on us FOG's
Keep at it.
sam
10mm at the thickest point down to 2mm doesn't really say a whole lot.
Any flat spot or is it 10mm straight taper to 2mm or is the taper convex/concave?
I've been doing convex or rounded taper, the last few pair have been flat (around 11.5mm) in the binding mount area tapering to 2mm.
It doesn't take much core thickness to make a huge difference in flex, so if its 2.5mm 10 cms from the tip vs 2.8 it will make quite a change in your flex.
As far as changing the flex characteristics of the finished ski...
I'd say just ski on them as they are, it's a lot of work to grind them down and make them stiffer. ( a little less work to make them softer)
Start again and chalk this pair up as a learning experience.
Next pair might come out too stiff but then you'll have a bit more experience for the next pair!
This whole thing is just one big learning curve!
Resin to hardener ratio is very important. Buy yourself a good scale and follow the recommended mixing ratio.
Mix small batches and after you've stirred the 5hit out of it, (scraping the sides) pour it into another cup and stir it again. Then your ready to put that in your ski.
If you mess up the ratio your epoxy won't ever set, and any resin or hardener that hasn't been mixed in properly will stay gooey forever.
Good on ya, only 17 and you have a huge jump on us FOG's
Keep at it.
sam
You don't even have a legit signature, nothing to reveal who you are and what you do...
Best of luck to you. (uneva)
Best of luck to you. (uneva)
okay so i was somehow able to split the skis and i said screw it , can't get any worse so i re-epoxied using the correct amounts of resin/hardner and re pressed and they came out a little stiffer but now i know they won't just delam on me half way down the hill. I think i made the cores just too thin by being too ambitious about having flexy skis. ill try and get some pics up tomorrow