What type/thickness Carbon fiber for SJ reinforcement

[Crab]

Some of you guys are way to reinforce happy.... all the $$$ your blowing in resin, you could have two, or a max of three layers of 11oz Carbon... with three layers of 11oz, you are ready for enough air to break your bones, before your hull

Im just not sure of the conformabilty of the 19oz... But one layer of that would be suffiecient for sure.

When carbon is done correctly it is very strong!

I have been cautioned on that very topic, I do plan to try rolls, surf every chance I get, and I will at least try a backy. I just don't want it cracking to bits from normal thrashings in the surf.

 

[Matt_E]

Pffft. Don't make the mistake to over-reinforce.
I've got 2 layers of carbon/kevlar with one layer carbon sandwiched in between.
I have been abusing the hell out of that hull, and not a single crack.

 

[skibums4life]

One layer of 19 oz seems to do the trick, if you foam the bond line and hood seal and make all the transitions smooth it seems to work easy. The biaxle is heavy stuff and seeing skis taking beatings one layer of 19 oz with the bondline foamed and the hoodseal foamed seemed to do the trick. Using the same idea around the handlepole bracket.

 

[Crab]

One layer of 19 oz seems to do the trick, if you foam the bond line and hood seal and make all the transitions smooth it seems to work easy. The biaxle is heavy stuff and seeing skis taking beatings one layer of 19 oz with the bondline foamed and the hoodseal foamed seemed to do the trick. Using the same idea around the handlepole bracket.

I like this plan, if its like the 17 oz biax I used last winter, it already has multiple layers in the weave. I don't want exess weight.

 

[Mark44]

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Some of you guys are way to reinforce happy.... all the $$$ your blowing in resin, you could have two, or a max of three layers of 11oz Carbon... with three layers of 11oz, you are ready for enough air to break your bones, before your hull

Im just not sure of the conformabilty of the 19oz... But one layer of that would be suffiecient for sure.

When carbon is done correctly it is very strong!

No need for carbon glass is fine unless you just want the bling bling factor.

Mark44

 

[Matt_E]

I like it because it doesn't soak up as much resin as glass does. Which is a big reason why it's lighter.

 

[sjetrider]

I like it because it doesn't soak up as much resin as glass does. Which is a big reason why it's lighter.

True DAT!!!!!!!!!!!!!!! but it aint cheap.

 

[Crab]

Anyone have any idea the weight difference when its all done to get similar strengths? If we are only talking a couple pounds, I could make that weight difference up between meals.

 

[Matt_E]

Depends on how much you do.
If you've got the entire bilge, nose area, back end of the ski, and tray, I'll bet it's over 5lbs.

 

[Mark44]

I don’t think anyone really knows the weight difference I think is more of an assumption.

Mark44

 

[Crab]

If my scale was right, I added a total of 6 pounds to the X2 last winter with all the foam, glass and resin to reinforce the inside, and reshape the bottom.

 

[Matt_E]

I don’t think anyone really knows the weight difference I think is more of an assumption.

Mark44

A wild ass guess, sure.
However, I was basing my guess on observing how much resin I have used on my reinforcements, both on glass and the carbon/kevlar hybrids.
I know how heavy the resin is, so I think my guess isn't too far from fact.

 

[Crab]

Just trying to value if a few pounds is really worth 6 times the cost in fabric, as for bling, who am I trying to impress?

 

[Matt_E]

You will use less resin, which saves you some money.
Doesn't make up for the cost in carbon, probably.

 

[Mark44]

If it is worth the cost you may want to put your ski on a titanium diet of nuts and bolds after the install to save a pound or two.

For recreational riding and not being a pro it’s not worth the cost to me.
IMO only


Mark44

 

[Matt_E]

^^Yup. What he said.
It's all in the application.

For what you use your ski for, I would just go with glass.

 

[Crab]

I should be able to come in at 450 pounds total weight including me on the ski, plus fuel.

 

[Matt_E]

You only add about 90lbs to it, no fair.

 

[Crab]

You only add about 90lbs to it, no fair.

150, plus the fuel weight.

 

[sjetrider]

If $$$$$ is no issue then just use CF IMO, but its really not needed. CF is stronger and lighter but is less flexible and is really overkill for our purpose IMO. If you drag the excess resin out of FG and or CF the weight saved wil be minimal. I have used Texalium, CF, and biax and can say the CF and Texalium soak up less resin but we are talking a couple oz. per side here not a half a gallon??????????? IMO you can beef up under the hood seal area & a 6" strip on bondline w/ chop and one layer of 8oz. CF or 1 layer of 10oz biax or one layer of 8.6 oz texalium or whatever and you will be good to go unless your doing this;View attachment 39413