changes in flex from sidewall material ????

[doughboyshredder]

I am building a couple pairs of convertible monoskis (aka split boards without voile hardware to avoid any hassles with voile). These are the first boards I am using maple sidewalls on. I have already increased my core thickness by .5mm to compensate for the loss of stiffness due to having the split in the middle. I am somewhat guessing on whether this is enough or not, based on how much softer my mullet got when I cut it in half.

I am curious now how much of an effect on flex switching from ptex sidewalls to maple sidewalls could have. The maple is incredibly stiff even when shaped down to 10mm wide and 8mm thick. Ptex of course is a noodle at that size. I know a few of you guys have used maple sidewalls. Do you think the sidewall has significantly stiffened your boards, or not really had much of an effect?

Thanks in advance for your input.

Oh, btw, working with maple is so much nicer than working with plastic. I don't think I'll ever go back if these work out good.

[MontuckyMadman]

I am somewhat guessing on whether this is enough or not, based on how much softer my mullet got when I cut it in half.

How big was it?



Never used plastic so I have no basis of comparison.

[doughboyshredder]

ha ha, how could you take yourself seriously with that hair? Wow.

[MontuckyMadman]

ha ha, how could you take yourself seriously with that hair? Wow.

Dood that's me from 99. I don't take myself seriously.

[doughboyshredder]

ha ha, how could you take yourself seriously with that hair? Wow.

Dood that's me from 99. I don't take myself seriously.

You can't be serious. Are you shitting me? LOL. I thought I had no style in my buttrocker years.

[skidesmond]

I've never used plastic sidewalls in ski building. Only because by the time I started ski building (last year) I had the fortunate opportunity to read all the posts people had on the problems getting plastic sidewalls to stay on.

Wood sidewalls simplify the process. I think it may give a slightly firmer feel for reasons you already said.

[skidesmond]

Wow, the mullet pic didn't come through at first. Molly Hatchet would be proud!

[OnDeck]

I am building a couple pairs of convertible monoskis (aka split boards without voile hardware to avoid any hassles with voile)..

I really don;t think this is an issue, unless you're lib tech (with a name like doughboyshredder....?).


I think the only way that sidewall woudl have any noticeable affect would be if they much, much stiffer than the other structual elements, given the small cross-section they add.

I've thought about wood sidewalls, but I have this beleif (probably not very well founded) that UHMW sidewall add damping and are more impact resistant.

[lex]

Are you applying the maple sidewalls during the lay-up or when you are making your core? If you are making a split board (2 skis) & have the maple sidewall already attached to the core you'll get a twisted core. If you're just making a board & cutting it in half after pressing then it's not an issue.

.5mm should be ok, guess depends on how much sidewall bevel you put on it. Also, a split board loses a lot of it's flex even after it's put back together.

I've only use bamboo, abs, surlyn & durasurf...never used maple before.

[doughboyshredder]

Are you applying the maple sidewalls during the lay-up or when you are making your core? If you are making a split board (2 skis) & have the maple sidewall already attached to the core you'll get a twisted core. If you're just making a board & cutting it in half after pressing then it's not an issue.

.5mm should be ok, guess depends on how much sidewall bevel you put on it. Also, a split board loses a lot of it's flex even after it's put back together.

I've only use bamboo, abs, surlyn & durasurf...never used maple before.

I glued the maple to the core as the sidewalls and as a center strip. I plan on profiling it and pressing it and then cutting it in half. What do you mean about having a twisted core? My plan was to cut out the base as a whole and then cut out a channel for the edges and a gap for the sawblade to make it through. Glue on the edges and then lay it up as a normal board, and cut it in half when it's done curing.

[lex]

gotcha. i was referring to if you have maple only on one side & the core is cut down the middle then the middle will eventually curve since the properties of the maple & aspen or poplar(whatever you use) are different. This is only regarding the core before lay-up

[doughboyshredder]

gotcha. i was referring to if you have maple only on one side & the core is cut down the middle then the middle will eventually curve since the properties of the maple & aspen or poplar(whatever you use) are different. This is only regarding the core before lay-up

That makes sense.

[sammer]

doughboy have you seen this?

http://www.unitysnowboards.com/site/videos/

The vid at the bottom is unity making a splitboard.
Interesting stuff. The core and base are 2 pieces, (full wrap edges)
then layed up as a single board then cut and finished as 2 separate pieces.
I had no idea!

sam

[doughboyshredder]

Yeah, I don't get why their resin is grey. I think they add pigment though. It seems like they add sidewalls during layup, which would kind of explain why they cut the core in half first. Interesting vid.

[sammer]

My thoughts...
I'd make two separate bases as in the unity vid

Glue them into your mold with some kind of spacer (for the saw blade)
Then put your one piece core on top of that.
The center strip in your core would have to be a bit wider to account for the space.

sam