1971 Silverline repair

Questions about boat repairs with our resins and fiberglass: hull patches, transoms and stringers, foam, rot etc.
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TRC886
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1971 Silverline repair

Post by TRC886 » Tue Oct 05, 2010 11:51 pm

This site is AWESOME :!: :!: :!:. I found several other boat repair forums and didn't learn much :?, but one of them had a link to this site :D :D :D.

I have a 16 ft V-bottom Silverline with a 100HP Johnson which has not been in the water since 1986 :(. I knew the sole was getting soft, so, (not knowing what I was doing :oops:), I pulled it out from under the shelter 2-3 yrs ago, cut out most of the sole, and removed all (5) stringers. I NEVER KNEW HOW FLEXIBLE AN UNSUPPORTED FIBERGLASS HULL COULD BE 8O 8O 8O. The hull is beginning to deform, so I must get it off the trailer and on a cradle very soon.

I currently have two questions.
1) Should the cradle have (2) runners, (1) under each chine and blocks under the keel, or should it have (4) runners plus the keel blocks? The boat is 63" from chine to chine.
2) How is the best way to get it off the trailer & on the cradle. I'm thinking about lifting it off with (2) hoists; (1) with a strap on the bow eye, the other with a spreader bar and straps to both stern eyes.

I don't currently have pictures, (no digital camera), but on my next post I'll try to scan an original brochure and any old photos I can find. I appreciate everyone's thoughts and input!

TRC
Last edited by TRC886 on Sun Jul 29, 2012 11:06 am, edited 1 time in total.



TRC886
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Re: 1971 Silverline repair

Post by TRC886 » Sun Nov 07, 2010 11:20 pm

I am making progress, I have pictures and have learned how to post them!!! :D :D :D

Here is a copy of the original brochure.
Image

I have built a stand and removed the motor.Image

You can see how I've removed the stringers,
Image

and how I'm developing a slight hook
Image

You'll have to go to my gallery at http://gallery.bateau2.com/thumbnails.p ... 266&page=1 to see the hook. This file name is "mid port", and I don't know why this image was cropped. The other images in this reply are just as large as this one, but were not cropped.

I'm not certain how bad the hook is, or even if it is in fact a hook. Depending on which strake I sight down, and if I'm sighting from the bow or the stern, sometimes the lines appear to be straight, and sometimes they appear to be curved.

I think my biggest problem is that I have developed concave areas around the roller bunks; but when I placed a 4' level beside the 38" bunk, I had less than a 1/16" gap between the level and the 'glass. I'm hoping that the hull will relax and return to its' original shape, similar to what a fiberglass fishing rod does, when I get it off of the trailer and onto a cradle. If not, well, I'll cross that one when I get to it.

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tech_support
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Re: 1971 Silverline repair

Post by tech_support » Mon Nov 08, 2010 11:00 am

TRC886 wrote: I had less than a 1/16" gap between the level and the 'glass. I'm hoping that the hull will relax and return to its' original shape, similar to what a fiberglass fishing rod does, when I get it off of the trailer and onto a cradle. If not, well, I'll cross that one when I get to it.
Thats not bad at all (for a boat like this). I would get it on some bunks before anything else. Also, support it with some blocks under the bow/keel, and at the outside of transom (bottom/side/transom corner)

Keep the cap on while you do all this, or else she will open up like a banana peel :)

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Re: 1971 Silverline repair

Post by TRC886 » Sat Nov 27, 2010 9:46 am

Thank you, Shine :!:. I'm making some headway on cleaning out my shop :D and will soon be building a cradle!

It appears that your cradle for the AS project is the simplest one to build:
Image
Image

What could be easier than (basically) placing a 4x6 on the floor and getting started :?: :D. It appears that the keel is resting on the concrete...probably on some wooden blocks that we can't see to protect the 'glass from the concrete :doh:. In reference to the dimensions on your AS, you wrote
relatively narrow, only 72" from chine to chine at the transom.
My boat is only 63" from chine to chine at the transom; but remember, the sole and stringers have already been removed :roll:. My main question for now is; Will bunks (runners???) at the chines, plus keel support, be sufficient to support my hull :?: , or do I need to add an additional set of bunks midway between the keel and the chines :?:

Thank you to everyone for your thoughts and advice :!:

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Re: 1971 Silverline repair

Post by Cracker Larry » Sat Nov 27, 2010 10:09 am

Chines and along the keel only. Never in the middle of a hull panel. The mid spans are thin and especially without the stringers, don't have enough strength to support the hull. Make sure you put a support under each transom corner too.

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Re: 1971 Silverline repair

Post by TRC886 » Sat Nov 27, 2010 10:21 am

Thank you, CL :!: :D . My main concern about the mid span is/was supporting my weight, so that I don't deform the hull as I'm inside working. I see now that I must be careful where I step as I work :!:

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Re: 1971 Silverline repair

Post by Cracker Larry » Sat Nov 27, 2010 11:18 am

Put some planks across the inside spanning side to side. In other words, construct a simple scaffold that will distribute your weight.
Completed GF12 X 2, GF16, OD18, FS18, GF5, GF18, CL6
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Re: 1971 Silverline repair

Post by TRC886 » Sun Nov 28, 2010 9:50 am

Thanks again, CL :!: :D

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Re: 1971 Silverline repair

Post by TRC886 » Fri Jan 14, 2011 8:42 pm

FINALLY got a hole cleared out big enough to get the boat in the shop! Lifted the boat off of the trailer and have it sitting on blocks in the hole; (so much for having a clean shop and being able to walk in without watching your step :lol: :lol: ) I'll post pics when I can.

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Re: 1971 Silverline repair

Post by TRC886 » Fri Feb 25, 2011 9:48 am

None of my last prints of B-porn turned out :?. I said XXX and bought a digital camera. Now I can only upload (1) picture at the time :doh:. This is not normal is it :?:

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