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  #51  
Old 07-10-2007
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I had a ménage à trois of DNS's last Saturday night . . . was more than a tad distracting.
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  #52  
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DNS stands for Did Not Sail???
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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  #53  
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TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough
Did Not Sail, after the three Dark 'n Stormies.
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  #54  
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Old glass

I do not think that all FRP hulls have finite lifespans; paradoxically, some of the oldest are the heaviest built and may outlast most newer ones. I have a Bermuda 40, launched in 1960. Blue Chantey has had 3 owners and 3 auxiliary engines, god knows how many sails (although I have a nice old nylon mizzen staysail with the date 1964 on it that still does the job), and has been refitted with wiring, tanks and various devices beyond numbering.

As for the hull (B40 #10), I removed the original jellcoat a few years ago and replaced it - the old one became cracked. The substrate, however, tested to be as sound as the day(s) it was first rolled into the mould. No core, of course, just matt and roving, layor after layor, including the deck.

As for myself, I would prefer an older boat if for no other reason than the new ones, with a few exceptions, do not reflect my personal idea of what a boat should look like.

Best of luck in your boat hunting.

Buell
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Drinkorum,

Although somewhat counterintuitive, the insurance industry study of older fiberglass hulls suggested that the older heavier hulls were predicted to have shorter overall lifespans than newer lighter hulls due to their resin rich matrix's, higher non-oriented fiber content (mat), greater use of resin accelerators, and their lack of, or wider spaced internal framing.

Manufacterers like Dolf LeCompte were aware of the problem in the 1960's and advertised that they not using accellerators or resin rich layup, and many of the British builders were experimenting with internal framing systems. I am not sure what Hinckley was doing in terms of layup and accellorators but Hinckleys of that era did not have much on the way of internal framing.

Jeff
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But those old B40s sure were sweet to look at.

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  #57  
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Quote:
Originally Posted by Jeff_H
Although somewhat counterintuitive, the insurance industry study of older fiberglass hulls
Is this study generally available? Sounds like it would make interesting reading.

Tim
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That study was available online for a while, but I have tried to find it in the past year without success. It is probably about 4-5 years old now.

It was a great source of info presented as three separate components looking at statistical data on repair costs to older boats vs newer boats in similar accidents, some case study data on actual accidents and repairs, and then the really telling part, destructive testing of actual hull panels cut from existing boats.

That was the part that was so amazing. To begin with, what surprised me was that older boats hull panels just were not all that much thicker and heavier than the boats that followed them. The report clearly concluded that the laminates themselves started out weaker than more modern layup schedules due to poorer construction techniques and went down hill quicker than modern layups as well.

The report also touched on other older boat issues such as prevelent use of discontinuous and lighter tabbing schedules, slurry hull to deck joints, more frequent use of encapsulated keels and the difficulty of making repairs to them once damaged. On the other hand, some of repair costs associated with these items were offset by the common practice of fully FRP lining modern boats.

Jeff
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Old 07-10-2007
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Jeff H

Is there an age line to distinguish between the older construction and the new construction techniques? I know there is a lot of talk of 0n late 70 early 80’s rosin formulas, are we to assume this same time period as distinguishing old versus new boats?
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Old 07-11-2007
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I don't think that there is a specific date after which materials and methods changed. I think that the evolution in building methods occurred at different times for individual builders and designers. Frankly, there are still boats being built with minimal internal structure and comparatively outdated laminating procedures.

Jeff

Last edited by Jeff_H; 07-11-2007 at 04:19 PM.
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