Tubbies

[BruceSki]

Okay so i just ripped off my Surfjetlouie tubbies to install some #.0 tubbies.

I put on the SJL's last winter and used 5200 to adhere them to the hull and foamed them.

the foam in there was soaked.

can i get away with installing the next set with no foam? i really dont feel like having it get soaked and make my ski way heavier.

i plan on using epoxy resin mixed with cabosil to install the next set so it will be permanent.(well more permanent than the 5200 i used last time)

 

[Shonuff]

I've never foamed Tubbies.

 

[Shonuff]

Let's invent a Tubbie Scupper.

 

[WAB]

I'd bet it leaked water from the screws. Don't blame the 5200.
The foam helps to have more surface area to get glue/epoxy on. I don't think just the edge of the sponson glued on will hold as well.

Also, I have not seen any comments on the newest Blowsion tubbie. It looks like it has a lip all the way around to help adhere it to the hull.

 

[BruceSki]

it might have leaked water from the screws... i put 5200 on the back and front sides of the screws but i guess it might not have been enough.

the #.0 tubbies have a very flat mounting area. i think it will be okay with only 2 maybe 3 screws and epoxy resin.

i guess im going no foam this time too.

 

[Idok]

I used to have some front sponsons on a superjet with nothign behind them and broke all to hell in a few months...

one tore completely off

 

[#ZERO]

I'd keep the four pound foam in the sponsons because it adds to the structural bonding support and keeps them from collapsing where to screws are mounted.

I'd use some 3:1 epoxy mixed with cabosil with some white pigment to bond to the hull and around eight stainless screws.

If you use some tapered head screws and a counter sink drill, they'll mount flush with the sponsons surface for a nicer appearance.

Using anything less than three pound foam or none in a set of tubbies is a bad idea IMHO.

 

[BruceSki]

thanks, soon as i sell the set i have now i will be ordering a set from you.

 

[#ZERO]

Cool beans.

I have one set remaining already foamed and I'll be making some more this week.

 

[BruceSki]

think i could get away with no foam if i wrapped it like this?
http://www.x-h2o.com/showpost.php?p=332596&postcount=4
Maybe just wrap the sides, or wrap the whole bottom of the ski.

I wouldnt use anything thick as it wouldnt be for reinforcement. It would just be there to hold the tubbies on and maybe for looks.

 

[demolition_x]

well i think the foam helps the tubbie adhere to the hull better. i buttered up the foam with 404 and epoxy, laid a layer of chop mat and wetted that out, then added some more 404 and epoxy and screwed it to the hull. once it was dry (day or 2) take the screws out, fillet the edges with the 404 epoxy (peanut butter mixture) and fill the screw holes, then sand sand sans smooth. no way water is getting in. thats how I did mine, and I know for a fact they are not gonna come off.

thats a more permanent and time consuming approach but it looks great when it is done. i might see if i saved some pictures when i did mine.