Formula 233 rebuild

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Re: Formula 233 rebuild

Post by Picknasty on Mon Oct 12, 2015 9:43 pm

Ok so I tested a few things today...

First I cut back 6 inches of additional stringer on the starboard side and tride to pry the tabbing up with a pry bar and a hammer, very tough to get it up but it did come up. I measured the thickness directly beneath the layers that came off and make up the entire thickness of the stringer encapsulation; it was roughly 7/16 thick. I drilled a few holes in different places and if I just lightly sand down through the old paint and the top layer of very thin mesh and expose the layer of CSM underneath I get to roughly 5/8 thick. Thoughts?

So I guess what I need to decide now is whether to continue sanding the whole hull this way and add glass back on top of the new prepared surface or just lightly sand and stick the new stringers and tabbing on top.

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Re: Formula 233 rebuild

Post by Admin - Shine on Tue Oct 13, 2015 8:46 am

Picknasty wrote:Ok so I tested a few things today...

First I cut back 6 inches of additional stringer on the starboard side and tride to pry the tabbing up with a pry bar and a hammer, very tough to get it up but it did come up. I measured the thickness directly beneath the layers that came off and make up the entire thickness of the stringer encapsulation; it was roughly 7/16 thick. I drilled a few holes in different places and if I just lightly sand down through the old paint and the top layer of very thin mesh and expose the layer of CSM underneath I get to roughly 5/8 thick. Thoughts?

So I guess what I need to decide now is whether to continue sanding the whole hull this way and add glass back on top of the new prepared surface or just lightly sand and stick the new stringers and tabbing on top.

Thats a good amount of glass!, part of the reason these hulls are in great shape after many decades.

If it were mine, I would remove the stringers and the small amount of tabbing directly at their base, then put new stringers on top. That was my plan on the formula I started. The original plan was to remove all the old tabbing, down to base hull laminate, but after seeing how well it was all bonded I was very comfortable leaving it there.

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Re: Formula 233 rebuild

Post by lawtoolguy on Tue Oct 13, 2015 12:51 pm

If you decide to remove the tabbing an air chisel work perfect for me, but my stringers had to be replaced.

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Re: Formula 233 rebuild

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