[Public-list] Propane Locker

[Roger L. Kingsland]

David,

I was wondering if the shape of the air vents on either side of the
lazarette might actually promote suction that would ventilate (suck) even if
the vent is under water.  I am reminded of the "L" shaped protrusions (about
3'' long parallel to the fuselage and sticking out about 1'1/2") on small
planes that I believe are used to measure air speed.  It would seem with a
small hole and water zooming  by (relative term) on all sides, the
efficiency could be better than those self bailing cockpit drains you see on
Sunfish.  Unfortunately, short of setting up some hit and miss experiments,
I don't know where to research this subject.  Any hints?

Roger

Roger L. Kingsland, AIA
Managing Partner
Kingsland Scott Bauer Associates (KSBA)
N40° 27' 49"  W79° 57' 59"
3441 Butler Street
Pittsburgh, PA 15201
www.ksba.com

1(412) 252-1500 X101 - Office & Voice Mail
1(412) 779-5101 - Mobile (no voice mail)
1(412) 252-1510 - Fax


----- Original Message ----- 
From: "David Fisher" <liquid_addiction at hotmail.com>
To: <public-list at alberg30.org>
Sent: Sunday, August 15, 2004 8:09 PM
Subject: Re: [Public-list] Propane Locker


> Jim, do you access your rudder stuffing box (assuming you have one on your
> boat...) via the lazarette or through the cockpit lockers?  this is the
only
> concern that really springs to mind there.  As to the increased waterline
> when healing and the wake pattern along the hull at speed, would this not
be
> a problem only if the boat was sustaining these attitudes over a sustained
> period, eg. on passage?  Even in this case, the behaviour of the boat
should
> allow the vents to drain with some regularity; in tacks or just through
her
> behavoiur in a sea.  If the boat stops at the end of the day, then the
> locker would drain freely then.  To me this seems sufficient.  Does anyone
> have experience to the contrary?
>
> My idea originally had been to house the bottle in a drum secured in the
> lazarette which drains via a hose to a through hull at the base of the
> transom.  The bottle manufacturers have conspired against me on this one,
> indicating that it should be stored and used vertically.  It's something I
> plan to look into further...  The idea of having smaller tanks and so
having
> a spare is attractive as it lessens the possibility of running out just
when
> the roast's gone in.
>
> Cheers,
>
> David, Kalitsah 440, Sydney.
>
>
> >From: "Jim Davis" <a30240 at earthlink.net>
> >Reply-To: Jim Davis <a30240 at earthlink.net>,Alberg 30 Public List -- open
to
> >all <public-list at alberg30.org>
> >To: "John Belt" <johnrbelt at worldnet.att.net>,"Alberg 30 Public List -- 
open
> >to all" <public-list at alberg30.org>
> >Subject: Re: [Public-list] Propane  Locker
> >Date: Fri, 13 Aug 2004 21:58:47 -0400
> >
> >John
> >
> >Thanks for the most concise answer.
> >
> >Roger
> >Also note water will sometimes come up the cockpit scuppers when heeling.
> >For propane you want to be absolutely certain it does vent overboard and
> >not
> >settle to the bilge.  Your insurance and the Coast Guard can get real
hyper
> >tense over this.  Of course if it does blow, you will be part of someone
> >else's problem as your will probably cease quickly.
> >
> >Jim Davis
> >S/V Isa Lei
> >CT 35
> >
> >
> >If man does find the solution for world peace it will be the most
> >revolutionary reversal of his record we have ever known.
> >George C. Marshall
> >
> >----- Original Message -----
> >From: "John Belt" <johnrbelt at worldnet.att.net>
> >To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>;
"Jim
> >Davis" <a30240 at earthlink.net>
> >Sent: Friday, August 13, 2004 16:29
> >Subject: Re: [Public-list] Propane Locker
> >
> >
> > > Has anyone noticed that when a displacement boat goes faster, it
squats
> >by
> > > the stern, submerging any holes in that area that were just a little
> >above
> > > the waterline when the boat is at rest? Specifically, the engine
exhaust
> >on
> > > my Alberg 30 was under water when the boat was moving at 6 knots,
power
> >or
> > > sail.  That is why the muffler and exhaust pipe had to be routed to
make
> >a
> > > loop as high as possible to keep water from entering the exhaust line
> >and
> > > the engine.
> > >
> > >
> > > This would make it pretty hard to put ventilating holes in the hull
for
> >a
> > > propane tank.
> > >
> > > From a former Alberg 30 owner
> > >
> > >
> >
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