[Rhodes22-list] Sailing - Highly Technical Question

[brad haslett]

Roger,

The old "magic" number that all standard aviation
computations were based on was 59 degrees F, now 15 C.
 I remember 0 C from high school physics.  Why we
didn't convert to the Metric system when it was
discussed in the 70's is beyond me but I'm too old to
ever think in terms of it as the primary measurement
now.  The head holding tank is long overdue for a
"dump".  If you saw the picture I posted a few weeks
ago of the Chinese 4 year old who went sailing with
us,  you'll appreciate the wisdom of her obvervation. 
"Mommy, that place stinks, I'll just wait".  

Brad

--- Roger Pihlaja <cen09402 at centurytel.net> wrote:

> Brad,
> 
> OK, one of my engineering reference books on
> municipal sewage treatment
> gives the freezing point as a range from 0 deg C to
> -10 deg C depending upon
> dissolved solids content & pH.  The higher the pH
> &/or the greater the
> dissolved solids content, the lower the freeze
> point.  You didn't say
> whether you have holding tank sanitizer (the blue
> stuff) in your holding
> tank.  If you do, it will suppress bacterial
> activity, & you won't be able
> to count on anaerobic digestion to produce heat. 
> -10 deg C is about +14 deg
> F.  That's the freezing point if you were excreting
> the most concentrated
> urine your body can produce without renal failure,
> such as if you were very
> dehydrated, almost in a state of heat exhaustion.
> 
> Hope this helps you make up your mind...?
> 
> Roger Pihlaja
> S/V Dynamic Equilibrium
> 
> 
> ----- Original Message -----
> From: "brad haslett" <flybrad at yahoo.com>
> To: <rhodes22-list at rhodes22.org>
> Sent: Thursday, December 02, 2004 7:52 AM
> Subject: [Rhodes22-list] Sailing - Highly Technical
> Question
> 
> 
> > Dear Rhodies,
> >
> > The s/v CoraShen went back in the water yesterday.
> > She was still in the slings when we arrived so I
> got a
> > good look at her bottom.  No pox this time and the
> > bill was exactly as quoted, yeah! About half-way
> home
> > I realized this would have been a good time for a
> > photo, damn!  The trip back to her slip was a good
> > knot faster at the same RPM and with temps in the
> > fifties and 7 knots, it was cold.
> >
> > Now here's a chemistry/physics question for you
> > scientific types.  I pulled the engine access
> covers
> > off and turned on the ceramic heaters set for 45
> > degrees. That's the extent of winterization. My
> oldest
> > son said "Dad, don't you think you should pump out
> the
> > head holding tank, there's a whole season of beer
> down
> > there".  I explained that re-cycled beer is very
> > saline and won't freeze.  Then on the way home
> began
> > to doubt my own wisdom.  So here is the question
> of
> > the new millineum.
> >
> > Does beer generated piss freeze or not?
> >
> > Brad Haslett
> > "CoraShen"
> >
> >
> >
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> >
> 
> 
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