[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
Re: Fw: [PSUBS-MAILIST] Re: Blowing ballast (was: question about general design?)
Certainly viable, just inconvenient. - Joe
----- Original Message -----
From: Lew Clayman <lew_clayman@yahoo.com>
To: <personal_submersibles@psubs.org>
Sent: Thursday, August 30, 2001 8:14 AM
Subject: Re: Fw: [PSUBS-MAILIST] Re: Blowing ballast (was: question about
general design?)
> --- Marsee Skidmore <heyred@email.msn.com> wrote:
> > No, 96 lb/cu ft was a number quoted for broken stone. Didn't say how
> > broken, but this was kinda the low average for a couple of different
types
> > and forms. Like Dave says, solid rock ranges up around 150 lb/cu ft. -
Joe
>
> Then, VERY roughly, you need around 5-7 times the volume of stone vs lead
to reach an equal
> weight. yeah?
>
> Seems that tree-huggin' ballast is still potentially viable, no?
>
> -L
>
> >
> > ----- Original Message -----
> > From: Lew Clayman <lew_clayman@yahoo.com>
> > To: <personal_submersibles@psubs.org>
> > Sent: Tuesday, August 28, 2001 10:06 PM
> > Subject: Re: Fw: [PSUBS-MAILIST] Re: Blowing ballast (was: question
about
> > general design?)
> >
> >
> > >
> > > --- Marsee Skidmore <heyred@email.msn.com> wrote:
> > > > > I've been considering using gravel ballast, out of
> > > > > granola-eatin'-Birkenstock-wearin'-tree-huggin' environmental
> > > > sensibilities.
> > > > > Besides, it's cheap. But Vance speaks a mouthful. Lead has a
density
> > of
> > > > > 710 lb/cu ft, compared to stone (basalt, granite, gneiss) at 96
lb/cu
> > ft.
> > > > > Please excuse my English units, but this is bad news in any
language.
> > >
> > > Ouch. And that assumes, I suppose, an "ingot" of stone - not a bunch
of
> > gravel with space between
> > > the chunks, which makes for more volume and (effectively) far lower
> > density. Dang.
> > >
> > > > > how much volume it takes to equal a chunk of lead the size of a
shoe
> > box.
> > >
> > > Roughly speaking, based on the above, a hunk of granite the size of a
> > small headstone... in effect
> > > it *is* a small headstone, come to think of it. Bad mojo!
> > >
> > > -L
> > >
> > >
> > > =====
> > > "Yo no soy marinero / Soy capitan"
> > > - Traditional Mexican Lyric (La Bamba)
> > > =====
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Make international calls for as low as $.04/minute with Yahoo!
Messenger
> > > http://phonecard.yahoo.com/
> > >
> >
> >
>
>
> =====
> "Yo no soy marinero / Soy capitan"
> - Traditional Mexican Lyric (La Bamba)
> =====
>
> __________________________________________________
> Do You Yahoo!?
> Get email alerts & NEW webcam video instant messaging with Yahoo!
Messenger
> http://im.yahoo.com
>