[Alberg30] Exhaust Pipe
Brian and Elaine Timmins
timmins at optonline.net
Thu May 31 14:28:31 PDT 2001
John,
Did you actually have your standpipe apart? What I'm trying to figure out
is: How does the water which is injected into the standpipe in the middle of
the top avoid going straight into the exhaust pipe which enters the
standpipe in the center of the bottom and extends "nearly all the way to the
top". I find it hard to beleive that in such an elegantly designed exhaust
system that the air pressure of the exhaust gas is all that is keeping the
water from running straight into the dry side of the manifold and straight
into cylinder #4. If this is the case, why haven't all Whitby installed
engines drowned in their own cooling water the first time they don't start
immediately?
Mine appears to be in great shape, but I'm planning for the future, just
in case.
Regards, Brian #497
----- Original Message -----
From: "John Birch" <Sunstone at idirect.com>
To: <public-list at alberg30.org>
Sent: Sunday, May 27, 2001 10:55 AM
Subject: Re: [Alberg30] Exhaust Pipe
> Yes Whitby built these mufflers and installed them on their A-37's too.
Our
> A-37 Sunstone, KC 65, has a Westerbeke 4-107 and uses such an exhaust
> identical to the one that was on our A-30 Wind Rose, KC 544. I would not
be
> surprised if Whitby also put them on the Whitby 42 and 45s either. It is
an
> elegant yet simple design, the centre hot exhaust pipe goes nearly to the
> top inside and the water and exhaust mix and exit about 70% of the
distance
> to the top out the side of the muffler water jacket leaving all the down
> stream piping fairly cool. They are not welded together but soldered, and
if
> you ever remover the pipe to change the iron exhaust flange at the
Manifold
> do be careful not to apply any twisting motion to the internal bronze pipe
> which comes off the iron elbow near the manifold flange or you will sheer
> the solder on the pipe where it enters the water jacket.
>
> The jacket and pipe are, I believe, bronze and not copper and when I
sheered
> the solder seal ( on Wind Rose's muffler ) and took it to a machine shop,
> the first thing the machinist said was "wow, that is worth a bundle, don't
> ever think of replacing it because it is bronze" - he put a torch on it
and
> resoldered the pipe at the base to the water jacket and it was perfect.
>
> When using a pipe wrench to remove or install, do be careful to pad the
> teeth so they do not chew up the bronze pipe (it is fairly soft and will
> mark or deform easily). If the exhaust iron elbow has failed it is often
> prudent to take it to a shop to get the iron flange off the bronze pipe
but
> REMEMBER the thing is soldered together and too much heat applied will
melt
> the solder. SO DO POINT THAT FACT (THAT IT IS SOLDERED) OUT TO THE
> MACHINIST.
>
> It is such a pain to get the whole thing back together and then find it is
> leaking - been there, done that ; )
>
> On Iron elbows - do remember to use a black iron elbow and not a
galvanised
> one as toxic fumes are released from the galvanising with the heat of the
> engine. The elbow is not cooled in the system and gets quite hot which is
> why the water hose runs up to the Muffler jacket. Many elbows are wrapped
in
> asbestos tape too - yea asbestos, yea that kind of asbestos - so please do
> take appropriate precautions handling it.
>
> Hope this is a help.
>
> Fair winds,
>
> John Birch
> 9 Homewood Avenue
> Hamilton, Ontario, Canada
> L8P 2M1
>
> Tel: (905) 521-9166
> E-Mail: Sunstone at idirect.com
>
>
> ----- Original Message -----
> From: Brian and Elaine Timmins <timmins at optonline.net>
> To: <public-list at alberg30.org>
> Sent: Sunday, May 27, 2001 7:58 AM
> Subject: Re: [Alberg30] Exhaust Pipe
>
>
> > Since we're briefly touching the topic, was Whitby's exhaust the
> > bronze/copper standpipe design? I have this design and it appears
original
> > (including a molded fiberglass cover for the output). It's in fine shape
> > still, but it came close to being trashed a few years ago when I changed
> my
> > manifold and exhaust flange. I've had problems with exhaust systems on
> other
> > A4 equipped boats in the past and I'm sort of amazed that this system
> might
> > have lasted since 1972.
> > Has anyone taken one of these apart and drawn up it's design and how
to
> > build one? It appears fairly simple from the outside, but I'm curious as
> to
> > the internal fittings, most especially the end of the actual exhaust
pipe
> > inside the water jacket and the end of the water injection at the top.
> There
> > must be some magic there since I've cranked my engine for quite a while
> > without it starting and I've never had any water get down to the
manifold
> or
> > the #4 cylinder. There must be something that keeps the water from going
> > straight into the exhaust pipe. (water injection flows down and exhaust
> pipe
> > flows up, both perfectly in the middle of the larger standpipe)
> > I'm curious since I know nothing lasts forever. This system appears
> > original from almost 30 years ago. If I've ever got to replace it, I'd
> like
> > to replace it in kind and not have to worry about it for another 30
years.
> > Has anyone tried this exhaust on an engine other than an A4? I'm so
> > impressed with this design that I don't understand why water lift
mufflers
> > were ever designed!!
> > Thanks and regards,
> > Brian A30 #497 Free Spirit
> > ----- Original Message -----
> > From: "George Dinwiddie" <gdinwiddie at min.net>
> > To: <public-list at alberg30.org>
> > Sent: Saturday, May 26, 2001 5:21 PM
> > Subject: Re: [Alberg30] Exhaust Pipe
> >
> >
> > > Chris,
> > >
> > > The exhaust pipe is generally black iron, though you can use bronze
> > > pipe and some older systems are made of copper. As others have said,
> > > the bridgedeck location is not ideal for a compass. You can
compensate
> > > for the iron in the engine and exhaust, but you'll still need a
> > > different deviation table when the engine's running, due to the
> > > magnetic field of the electric currents.
> > >
> > > Many people have mounted compasses in the bulkheads. Some have
mounted
> > > the compass on the companionway slides. Our compass is mounted on a
> > > board that slides into the companionway like a hatch board. It's a
> > > bit of a nuisance to step over and you have to store it somewhere,
> > > but it's a pretty simple solution.
> > >
> > > - George
> > >
> > > Christos Katehis wrote:
> > > >
> > > > Almost Exhausted in searching for the magnetic
> > > > field.......................after purchase of new compass, I
> > > > found it !
> > > >
> > > > What type of material is the exhaust pipe leaving the Atomic4
> > > > supposed to be? Because the material that is now on #383 is
> > > > affecting the compass. I guess it was re-done with the wrong
> > > > material.
> > > >
> > > > Thank you,
> > > > Chris Katehis
> > > >
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