Another "OMG circular saw accident" in an odd location.

[Matthew103]

Yep, I joined the club! I am in the process of tearing everything up for a recore, however, I am a total newb to glass work, but feel capable as I am mechanically inclined. I plan to order 5-6 gallons of polyester resin from merton's along with all of my glass materials and supplies.

This was the first accident. Not so bad, just a little interior patch and fill with "peanut butter" from the bottom... at least from what I gathered from my research here.



Now this happened! it starts where the pad meets the sponson and moves away towards the "V", so it's in a tight area. From up top it looked like I was getting nothing but the plywood from the floor. Boy was I wrong. So now I am freaking out because this boat will run 95mph and it obviously needs a major structural repair both inside and out. Whats my best plan of action?

 

[ondarvr]

Re: Another "OMG circular saw accident" in an odd location.

It's not a big deal, just about anything can be fixed and be as strong (or stronger) as when new. The club you just joined is bigger than you think.

 

[jigngrub]

Re: Another "OMG circular saw accident" in an odd location.

In hindsight I guess you figured out to set your blade depth to just barely cut through the thickness of the decking eh?

Filler on the outside and glass patching on lap on each side of the cut and increase the the size of the patch by 6" every time you layover. 3 layups for a final width of 18" shold do it, or you can go 4 with a final width of 24". Some folks may say that's too much, but can you really have too much when you're doing 95 mph on the water? I'd patch it until it felt as strong or stronger than the rest of the boat.

 

[Matthew103]

Re: Another "OMG circular saw accident" in an odd location.

The depth was set, I was just an inch away from the ply and in the glass.

Looks like a lot of people do this. Makes me feel better in a way. haha

I am just not looking forward to the extra work I have created for myself.

:facepalm:

 

[jigngrub]

Re: Another "OMG circular saw accident" in an odd location.

The depth was set

... just a little too deep.:watermelon:

 

[pauloman]

Re: Another "OMG circular saw accident" in an odd location.

polyester resin doesn't have nearly the properties associated with epoxy resins. you should be using a non blushing epoxy, perhaps even one reinforced with kevlar and ceramic/feldspar. Also lots of glass. Most the the strength comes from the cloth not the resin system.

paul

 

[Woodonglass]

Re: Another "OMG circular saw accident" in an odd location.

I'd like to see pics of the whole boat. Also pics of the damage on the inside of the hull so we can ascertain the exact location on the hull where this is located. This can dictate methods and materials at times.

 

[coolbri70]

Re: Another "OMG circular saw accident" in an odd location.

a circular saw accident that involves no flesh loss is best, the hull can be repaired, good as new or stronger. 95 mph? build it very strong

 

[glenn property of pam]

Re: Another "OMG circular saw accident" in an odd location.

its a big club :facepalm:

 

[Matthew103]

Re: Another "OMG circular saw accident" in an odd location.

Inside of the gash... along the shop vac hose. I haven't removed the "skin" layer for the core yet, so it looks thicker than it really is.



Here is an idea of the hull. The cut is on the port side at the joint where the V meets the sponson.



Here is how the boat will travel at speed.

 

[glenn property of pam]

Re: Another "OMG circular saw accident" in an odd location.

Looks like a nice hull. Looks fast on the trailer

 

[ondarvr]

Re: Another "OMG circular saw accident" in an odd location.

With the amount of work you are doing to the inside the hole will be covered anyhow, so a just a little more glass and you'll be good.

 

[Matthew103]

Re: Another "OMG circular saw accident" in an odd location.

Looks like a nice hull. Looks fast on the trailer

Thank you. I love the way they look. I bet if this design were to be released today it would be just as accepted as it was in the late 80's. I may modernize it with a new paint scheme in the future.

With the amount of work you are doing to the inside the hole will be covered anyhow, so a just a little more glass and you'll be good.

That is kind of what I was thinking. I was devastated at first, but then I realized the core work is actually a more difficult repair than the slit. I think it should be plent strong since I can glass from the V to the sponson once I grind it all down on the outside. The 90* angle should help strength.

 

[Woodonglass]

Re: Another "OMG circular saw accident" in an odd location.

What core material is currently in there and what will you be going back with?

 

[Matthew103]

Re: Another "OMG circular saw accident" in an odd location.

What core material is currently in there and what will you be going back with?

It used to be 1/2in Balsa... nothing left of it though. I have been able to vacuum it out.

I will be going back with this: Merton's Fiberglass & Marine Supply: Balsa Core

 

[Woodonglass]

Re: Another "OMG circular saw accident" in an odd location.

I kinda figured it was End Grain Balsa Core. Have you ever worked with that before?

 

[Alwhite00]

Re: Another "OMG circular saw accident" in an odd location.

That's a cool looking boat, What is it and do you have a side shot of it?

LK

 

[Matthew103]

Re: Another "OMG circular saw accident" in an odd location.

I kinda figured it was End Grain Balsa Core. Have you ever worked with that before?

Nope. This is my first rodeo with fiberglass of any sort. I am more than capable and have been messing with anything mechanical since I could walk. Luckily, I have the help of a few people who have done 3 core jobs in the past and another kid who is great with glass work.

That's a cool looking boat, What is it and do you have a side shot of it?

LK

Thank you. It is a 1987 Hydrostream Valero YT.



The balsa core was so shot it caused this damage during the 700 mile trip from FL to VA. It didn't really get any worse from VA to SC when I purchased it. I gave $2700 for it on a nice aluminum trailer, with new interior, and a fresh 2000 johnson 150. Unfortunately the motor is a 25in shaft, so I am looking to sell it and pick up a bridgeport.

 

[Woodonglass]

Re: Another "OMG circular saw accident" in an odd location.

Good to hear you have some experienced "Core" helpers cuz balsa core installation is not the easiest thing to do!!! Vacuum Bagging is common but not absolutely necessary and kerfing the core to help if conform to the curves of the hull and filling the kerf with resin is important as well. Getting a good solid lamination to the outer and inner hull is imperative to making the hull solid and keeping water penetration out. Good luck with the process.

 

[sevanseriesta]

Re: Another "OMG circular saw accident" in an odd location.

I like the Boat. I was in your same boat last year when I started. Never fiberglassed before but was very mechanically knowledgeable. I will say this it really is not going to be that hard to fix. Only because I did the same thing, not quite as big but same concept. Here is a recomendation that I got.

get a piece of wood that goes the length of the cut, cover it with wax paper, find a way to hold it up tight, duck tape is good, I used a jack to just put pressure, put some pb in the cut then cover it with 1708, I did 4 layers way over kill but I will take the added assurance of nothing to worry about.

I really under estimated how much resin I would need, mostly because of the amount of PB I had to make. I got 10 gallons and I have gone through 7 gallons and all I have glassed in was my transom and made some hull repairs. Just so you have an idea.