Re: [PSUBS-MAILIST] Re: Fiberglass

["Dan J. Rice" <dan.j.rice@sherwin.com>]

Finally!  Someone else who likes concrete! There is that certification problem
though....

Dan




"Greg Teiber" <wolfe19@megsinet.net> on 01/16/2000 09:22:53 PM

Please respond to personal_submersibles@psubs.org

To:   personal_submersibles@psubs.org
cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

Subject:  Re: [PSUBS-MAILIST] Re: Fiberglass



The lack of consitancy is also a BIG concern.  In a given layup, you may have
strngth vary by as much as 50%. (note that 50% is a number pulled out of the
air..  Delamination can be extremely hazadous to your health and you can't see
it after the hull is built. )  Hell in the boat industry a given hull while
still structually sound, is EXTREMELY likely to have at lest some cracks and
often times leaks into the substrate materials.  Basicly if I were to go down in
a sub it's gonna be of some uniform material.  Even concrete is a better choice
when compared to the traditional steel. At least concrete/cement is uniform in
it's strength.  And 100% repeatable.

*********** REPLY SEPARATOR ***********

On 1/16/00, at 9:00 PM, Michael B Holt wrote:

>On Sun, 16 Jan 2000 19:28:47 -0600 "Greg Teiber" <wolfe19@megsinet.net>
>writes:
>>I have always had concerns about fiberglass's compressive strength.
>>in fact, it concerns me greatly.  I'd like to see some data on
>>fiberglass's strength :)
>
>I would, also.
>
>I don't recall seeing any of that.   That's why the comments in those
>two books are so intriguing: there's no obvious support for it.
>
>I'll do some research.
>
>Other than compressive strength, what would you like to know?
>
>However, it appears to me that even if we have quantitative
>data on fiberglass, a lot of its characteristics are controlled
>by the resin, the quality of layup work and the type of glass
>mat.
>
>
>
>
>
>Michael B. Holt                                Oregon Hill, Richmond,
>Virginia, U.S.A.
>                "There's gotta be an excuse for some of this."
>--
>
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