Moomba Boomerang Rebuild

[markedenfield]

Originally Posted by tunnels

Dr. Yachts mindset with the 1.5 CSM x 2 and then the 1708. Drinks lots of resin

Wont do that again will you ?? why would anyone in there right state of mind want to lay 1 x 1.5 of csm ?? thats silly absolutly insane !! If you used epoxy why are you using csm in the first place ?? wow !! Did you use any peel ply over the top ?? :

Good Morning Mr. Tunnel: Great response to my post. I remember when I had my first beer too. I don't know if you consider yourself a professional in the art of boat building but if you are I can see why you responded the way you did. Over the years you've sucked up gallons of resin fume and this has led to the vacuum between your ears. This has fractured your ability to effectively communicate with others and you should stay off the computer while drinking.

[tunnels]

Get out of bed on the wrong side did you !! . 1.5 OZ CSM is almost nothing!! i cant ever remember seeing glass that thin and 2 layers is as useless and tits on a bull !! 450 gram or nothing at all . If you use polyresin ok !! . But if your using csm and epoxy you are one nut loose on a 3 stud wheel !

[markedenfield]

Nope, didn't get out of the wrong side of the bed. I just don't appreciate being called an idiot. I am using US Composites 435 laminate resin. I was monitoring both this forum and IBoats about how to secure stringers and ribs into a rebuild. It seems as though there are two trains of thought on the subject and for someone who has no experience in it...who do you believe?

I used resin and cabosil to make the peanut butter mix to stick the stringers to the hull. I came up both sides of the stringers with 1.5 CSM (twice) and then 1708 as the final. I was going to try and stay away from any screws in the deck and was going to use CSM to cover both sides of it then tab it to the side of the boat with 1708.

What's your thoughts. Epoxy was unfortunately way to expensive for me.

[tunnels]

So you are using polyester !! In reality you should be using Vinylester !! Its a much better and much stronger resin and is epoxy based polyester !!
Csm galls is just a bedding layer for the 1708 . the 1708 is your strength and what will give you the guts to hold !!!,Csm does not have all that much going for it specially if you are using thin glass! csm is used as a bedding layer between layers of good glass to help hold resin and help give glass reinforcement to the surplus resin in hollows and where it hasnt been rolled out 100% !!Peel ply over the top will help compress the glass fibres and hold them till it goes hard the surplus resin will come to the surface and when you rip the peel ply off you take the excess resin with it . Plus makes a nice smooth finish and looks really good .
Resin alone is brittle , glass alone wouldnt hold anything !! But marry the two together and you have something that can be increadably strong . But it doesnt end there . The layers of glass cloth you use give enormous strength if used properly . There a seemingly endless great long list of glass matts and cloths!, the weaves and weights of glass !! the oriantation of the glass fibres is where the real secret lies and if used with thought and understanding then it will be really strong !!. so next time you get out of bed make sure its the right side !!
Even using the same glass and changing the way its laid you can increase the strength by quite a bit .

[tunnels]

Originally Posted by markedenfield

Nope, didn't get out of the wrong side of the bed. I just don't appreciate being called an idiot. I am using US Composites 435 laminate resin. I was monitoring both this forum and IBoats about how to secure stringers and ribs into a rebuild. It seems as though there are two trains of thought on the subject and for someone who has no experience in it...who do you believe?

I used resin and cabosil to make the peanut butter mix to stick the stringers to the hull. I came up both sides of the stringers with 1.5 CSM (twice) and then 1708 as the final. I was going to try and stay away from any screws in the deck and was going to use CSM to cover both sides of it then tab it to the side of the boat with 1708.

What's your thoughts. Epoxy was unfortunately way to expensive for me.

Yip theres a million ways of doing that job and each way has its good points and its bad and every job is differant . Carbosill and resin is brittle !! Next time you do a simular job add sone microfibres to you mix and give it some guts and wont fall apart . remember the oriantating of fibres is the key to any and all fibreglassing !!,simply by changing the dirrection of the glass strands you can almost double the strength of the job yet its still the same glass and the same everything else . Just takes a little thought and understanding what you have in your hand .
Every day i work with surposed experts that have worked in the glassing industry half a life time but in actual fact they know nothing and there understanding of the materilas they use all the time is zero !!

[markedenfield]

I forgot to mention it but I did add microfibers to the Cabosil and resin.
Do you do fillets so the cloth has a smoother transition?

[tunnels]

Originally Posted by markedenfield

I forgot to mention it but I did add microfibers to the Cabosil and resin.
Do you do fillets so the cloth has a smoother transition?

Radiused corners are much more forgiving than a shape right angled corners as the abrupt change in direction of the glass fibes is the weakest point and if it breaks that first place it starts !!!
Glassing onto the older part of the boat needs to be clean ground and scuffed with really course samding disc The rougher the better so it gets a really good surface bond !!

[markedenfield]

I would like to preserve or protect the decking I am putting down. I couldn't afford marine plywood so it is exterior 1/2". My thought was to wet it first with poly resin and then the 1.5 CSM. The only problem with that thought process is that the edges will still be exposed to the water. This is a wake boarding boat and the kids get in and out of the water a lot. It will have carpet, although I don't like the idea, but my kids do so....