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RE: A sub question
Thanks Ray, you gave me enough info to convince me to buy the book.
I've just been procrastinating.
> ----------
> From: Ray Keefer[SMTP:Ray.Keefer@eng.Sun.COM]
> Sent: Wednesday, September 09, 1998 10:26 AM
> To: personal_submersibles@psubs.org
> Subject: Re: A sub question
>
> Hi Richard,
>
> I brought my ABS book to work with me today. The answer is found:
>
> Page 3/4, Section 3.19 Buoyancy, Emergancy Ascent, and Stability,
> Subsection
> "a" Intact Surface Stability. [Summarized.]
>
> Must have at least one hatch.
>
> Stablity must be that under the worst loading conditions (most weight
> carried)
> you do not roll enough to ship water down your open hatch under sea
> state 3
> conditions.
>
> And, the minimum height from water line to hatch coaming can not be
> less then
> 2.5 feet.
>
>
> If you want to be ABS certified you must comform to their specs. If
> you just
> want to use the ABS specs as a guideline then you can fudge a bit.
> Personally
> I will follow ABS specs as close as I can. In any case if you are
> seriously
> into building your own submersible then the ABS book is well worth the
> money.
>
> Regards,
> Ray
>
>
> > Hi Richard,
> >
> > I have the book. It was something about not shipping water at some
> wave
> > state. I don't remember if there was a minimum height or not. I'll
> > look it up tonight.
> >
> > Regards,
> > Ray
> >
> > > I have a specific question regarding subs which hopefully someone
> can
> > > answer or direct me to the answer of.
> > >
> > > What are the "freeboard" requirements or recommendations for a
> personal
> > > sub? I have some idea of what it "should" be but am interested in
> what
> > > the ABS or other sanctioning organizations might have to say. If
> anyone
> > > has invested the $75 for the ABS book (I have not, yet!) please
> let me
> > > know if it covers this.
> > >
> > > The reason I ask is I am exploring a somewhat different design for
> a one
> > > person sub which involves vertical (standing upright)
> ascents/descents
> > > and a transition to horizontal (prone) once at depth (to a "Deep
> Flight"
> > > style craft). My idea is to minimize the cost of the structure
> and to
> > > maximize streamlining at the same time.
> > >
> > > Thanks for your help.
> >
> >
>
>