another re-enforceing thread

[ski4]

I am considering it but wonder if anyone has any emperic proof that grinding the rails in the hull down and putting on a layer or two of glass is really worth it.

when i think of it it seems like this to me

take your 16 on center studs and take out every other one maybe even more , now put up 3/4 inch drywall and not 1/2

will that really be any stronger, don't seem like it to me.

it jsut seems to me that vertical support will be just as strong if not stronger than taking them out

[jetskiking]

putting the fiberglass on is way stronger than the ribs. Its not like drywall fiberglass actually has structural qualities. Your putting back in more fiberglass than your grinding out and distributing the forces evenly across the hull.

[Big Kahuna]

I believe Wamiltons grinds them out, and 24-7 leaves them in.................. personal preference.

[Air Gramps]

Using a good biaxial weight glass (~17oz) would be very difficult to wrap over a 1/4 by 3/8 rib. Grind. most do.

[steve802cc]

Reinforcing is a must if you going to surf ride and try tricks etc. Wether you grind or not seems to be a personal preference mostly based on the fact that it would be a pain in the azz to lay glass over the ribs.

BeachJunkey has some good pics of how bad you can damage a ski that is not reinforced here http://www.pwctoday.com/showthread.php?t=58624

Steve

[ski4]

yikes
that dont look fun at all

i was thinking instead of grinding to just lay out the glass and cut out the area around the rib and then going fro there

in my research i am finding a lot of negatives to using carbon fiber as well do to it being to stiff

i am not much worried about the bling
well maybe a little but could go either way

if glass the better way to go??

[Mile9c1]

I saw a 24-7 job that didn't have ribs under it... it was really thick carbon fiber though.

[Flash-FX]

If you don't want to grind off the "ribs", you could create a "foam sandwich"
that covers up to the level of the ribs. Use like marine grade polyurethane
5 or 8 lb. foam..blue stuff..comes in sheets.Cut it in pieces to fill in between the ribs,then Epoxy them in. Use a good bonding filler like (cab-o-sil) to mix with the Epoxy and stick them into place. (use epoxy cause the bottom is SMC, "sheet molded compound" and polyester resin doesn't stick as well).
After that cures block sand it "level" with the ribs....
That foam sands real easy with 36 grit..Fill the excess voids/holes with another
mixture of Epoxy and microballoons. That stuff sands easier too.
Ok.. now lay down your reinforcement layers to pretty things up.....Carbon is stiffest, Kevlar is lighest, Glass is cheapest. Almost anything is good.
Sometimes think "aircraft" when working on these "boats"....

A wall with sheet rock is structurally stronger with one layer on each side vs. two sheets on the same side...But don't let it get wet!

[jetskiking]

The only problem I see with not grinding the ribs is clearence.On my buddys round nose they didnt grind the ribs and had to grind the reinforcement for his b pipe to fit.

[PAIR-A-DICE]

The only problem I see with not grinding the ribs is clearence.On my buddys round nose they didnt grind the ribs and had to grind the reinforcement for his b pipe to fit.

I ground the ribs on a boat I did and still had problems with the B-Pipe clearing.

[Big Kahuna]

just take a rubber mallet to the bpipe........

[Matt_E]

Or just cut the ribs. At least in that area. I would prefer that to smashing up a pipe. (Yes, I've done both!)

[MikeB/Mako Mike]

I used Blowsions reinforcment kit and was very happy with it.They make one kit for the sides and one for the nose and handle pole area.

[ski4]

what does the blowsion kit come with

[Matt_E]

sometimes cutting the ribs isnt enough and you have to dent the pipe anyway. so, if youre going to re-enforce, you now have two reasons to grind. besides, even factory pipe says you will probably have to dent the chamber to get it to fit in the instruction manual that comes with a b pipe.


I hear you. Just saying that filling the space between ribs and then reinforcing is probably not a good idea.

[Matt_E]

what does the blowsion kit come with

Glass and carbon, I believe.

[Flash-FX]

You have to be careful on where you grind or fill. Of course the ideal final install
will leave a uniform clearance so nothing "rubs". Since the motor is out, you
can do trial and error fittings to make it work. Most every pipe needs "adjustments". It just takes extra time.

[yamaslut]

Grind The Freaking Ribs!!!!!!!!!!!!!!!!!!!!!

[michael950]

I would say its 60/40 for grinding ribs. Most of the aggresive surf riders grind the ribs, probably because its easier. Do yourself a favor and grind.

http://www.jrmagoos.com/forsale.html

Paul used the Carbon/Kevlar mix for reinforcement.

[teton]

i didnt grind the ribs on mine, i used carbon twill though, which really conforms well , but the stuff is real thin so i did about 5 layers which would be expensive if you didnt have the stuff laying around like i did, ive been pounding on the sides ever since trying to do barrel rolls....no damage yet

[Matt_E]

Sell some carbon and buy X cases. :biggthumpup:

[retroicon]

If you don't want to grind off the "ribs", you could create a "foam sandwich"
that covers up to the level of the ribs. Use like marine grade polyurethane
5 or 8 lb. foam..blue stuff..comes in sheets.Cut it in pieces to fill in between the ribs,then Epoxy them in. Use a good bonding filler like (cab-o-sil) to mix with the Epoxy and stick them into place. (use epoxy cause the bottom is SMC, "sheet molded compound" and polyester resin doesn't stick as well).
After that cures block sand it "level" with the ribs....
That foam sands real easy with 36 grit..Fill the excess voids/holes with another
mixture of Epoxy and microballoons. That stuff sands easier too.
Ok.. now lay down your reinforcement layers to pretty things up.....Carbon is stiffest, Kevlar is lighest, Glass is cheapest. Almost anything is good.
Sometimes think "aircraft" when working on these "boats"....

A wall with sheet rock is structurally stronger with one layer on each side vs. two sheets on the same side...But don't let it get wet!

Have you actually done this? The "Foam Sandwich"

[txsuperjetfreak96]

yeah i was thinking bout going with blowsions carbon figer reinforcement kit, i do plan on putting in factory b pipe.

[Bluffskier]

Has anyone used Kevlar for re-enforcing? I'm going to do this one day and was thinking kevlar... Maybe the 5oz 60x36 sheet of the stuff, it's only 25 bucks from uscompostes. I'm in a moral delima about grinding the ribs too, I have heard comments in the past about extra matting making the hull heavy or something.

EDIT: I just saw the hybrid fabrics on UScomposites, sounds promising, any experiance with these new cloths?