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Re: [PSUBS-MAILIST] acrylic sphere/lithium Hydroxide
Gary is right.. most classification rules are useful
for anybody with technical background. And if you have no technical
background - maybe you should not built a psub..
We call here on the yard the classification rules "the cookbook" because
in the most parts it is so simple to use..
Carsten
Gary R. Boucher schrieb:
>
> I'm not arguing against a P.E. looking at one's design. I think it is
> good in some cases, essential in others. But, acrylic viewports and domes
> are more cookbook than math at this point in time. Using the PVHO
> standards, anyone technically competent can in less than five minutes
> obtain a thickness for a viewport of a given outside diameter, supported
> diameter, proposed operating depth, and temperature range. Many years of
> research and extensive testing have gone into acrylic viewports and domes.
> I manufactured my own viewports for my sub, but I had no trouble
> getting quotes from reputable manufactures. I think that if a manufacturer
> got the idea that a builder had absolutely no idea what was going on, he
> might have reservations. But, much of their liability protection is in
> manufacturing acrylic that conforms to a universally accepted standard (PVHO).
>
> G. Boucher
>
> At 07:31 PM 9/9/2002, you wrote:
> >Surely you understand the liability of producing acrylic for a PVHO. No
> >reputable acrylic manufacturer would produce viewports or domes without
> >calculations. Please don't design any manned submersible without having a PE
> >run the calculations....surely your life is worth more that a few hundred
> >dollars!
> >
> >Best Regards:
> >Phillip Janca
> >Chairman
> >HyperTec, Inc.
> >World Leader in Hyperbaric Technologies
> >800-218-3588
> >940-564-5600
> >940-564-5609 Fax
> ><A HREF="http://www.hypertec.ws">http://www.hypertec.ws</A>