Yanmar 3GM raw water cooled?
 

Actually, I was surprised to find there is no "large" budget. Ocean
Planet, and Bruce Schwab have no major title sponsor, as of yet.
Although there are a number of supplier sponsors, who have donated gear,
the marine industry is apparently not really large enough to have the
kind of excess cash often associated with American corporations. The
boat construction, and the Around Alone race were largely funded by
donations of $50-1,000.00 (some more) coming through the internet.

I met Bruce Schwab last weekend when I went up to Portland, Maine and
gave him two days of my labor. I spent the time grinding out stringers,
epoxy fillets and cutting out some mahogany knees (with a Sawmill) which
the designer, Tom Wylie, had said could be replaced with foam, for the
shape, and carbon fiber/epoxy, for strength.

If he had the bucks, the Yanmar would come out in place of a Nanni
diesel, which I understand is lighter.

Right now, the guy is working 10 hours a day on the boat, and spending
the evenings on the phone and emailing various leads in search of money.
It is interesting to watch a guy who is really dedicated to an idea work
toward it, and I offered to try and track down some options with regard
to the engine.

You can see the story at : http://www.bruceschwab.com if you're interested.

As I sail an Alberg 35, built in the days of really heavy fiberglass, I
too, don't quite "get" the chasing of ounces. After a few conversations
with Bruce, though, it's clear that, in that particular playing field,
its part of the game.

thanks,

Jonathan

Leanne wrote:
"Jonathan" wrote in message
...
Thanks Glen, I'll check that out.
The point here is weight saving, so he hopes to be rid of the
exchanger
tank, the additional pump, etc.
As the engine is used for battery charging, we will need to
install a
loop to recycle heated water through the engine, as the raw
water in the
Southern Ocean would cause the engine to run a little too cool
:)

How practical is it to redesign the cooling system against the
cost and the few pounds of weight. Ok, we have a large budget so
cost not a factor, but would the weight gain be that great as you
are tossing out a recalculating system that works well in cold
waters to replace it with another system of almost the same type
to do the same thing. I realize that weight or the lack of in a
ULDB is critical, but IMHO, I don't think this is a good
solution.

Leanne

Yanmar 3GM raw water cooled?
 

In article ,
Jonathan wrote:

I spent the past weekend working with Bruce Schwab on his wood, foam and
carbon fiber Open 60, Ocean Planet.

In preparation for the Vendee Globe in November, he is paring as much
weight from the boat as possible, and one thought is changing the Yanmar
3GM diesel to raw water cooling, thereby eliminating the second pump,
the heat exchanger tank, etc.

I have a few friends with the 3GM raw water engine that would probably
happily swap with him ;-)

I seriously suspect any engine shop would trade you even AND maybe ship
it for free.

And on the cold water concerns in a later post: That's what thermostats
are for. Yes, it'll be cool at first, but I suspect Bruce will run the
engine for relatively long periods at relatively high power levels or
he'd have gone to the 2GM or 1GM.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/

Yanmar 3GM raw water cooled?
 

In article ,
Jonathan wrote:

I spent the past weekend working with Bruce Schwab on his wood, foam and
carbon fiber Open 60, Ocean Planet.

In preparation for the Vendee Globe in November, he is paring as much
weight from the boat as possible, and one thought is changing the Yanmar
3GM diesel to raw water cooling, thereby eliminating the second pump,
the heat exchanger tank, etc.

I have a few friends with the 3GM raw water engine that would probably
happily swap with him ;-)

I seriously suspect any engine shop would trade you even AND maybe ship
it for free.

And on the cold water concerns in a later post: That's what thermostats
are for. Yes, it'll be cool at first, but I suspect Bruce will run the
engine for relatively long periods at relatively high power levels or
he'd have gone to the 2GM or 1GM.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/

Yanmar 3GM raw water cooled?
 

Good point !
One more addition ..... if you convert the engine from fresh to raw
water cooling you MUST also change the thermostat to one that opens at
135 deg. F. Sal****er will precipitate carbonates (from raw water)
when higher than 150 deg. F. and will foul the internal cooling
passages inside the engine. If you dont change the thermostat then
you must periodically 'pickle' the internal cooling passages with mild
acid (which will also remove engine base metal; alternatively you can
use a commercial descaling organic-acid mix (Marsolve, etc.) that wont
affect removal of the base metal.

With raw water you must remember that if the internals are allowed over
150 deg. F. .... then you are forming ROCKS inside the engine.

Hope this helps.

Yanmar 3GM raw water cooled?
 

Good point !
One more addition ..... if you convert the engine from fresh to raw
water cooling you MUST also change the thermostat to one that opens at
135 deg. F. Sal****er will precipitate carbonates (from raw water)
when higher than 150 deg. F. and will foul the internal cooling
passages inside the engine. If you dont change the thermostat then
you must periodically 'pickle' the internal cooling passages with mild
acid (which will also remove engine base metal; alternatively you can
use a commercial descaling organic-acid mix (Marsolve, etc.) that wont
affect removal of the base metal.

With raw water you must remember that if the internals are allowed over
150 deg. F. .... then you are forming ROCKS inside the engine.

Hope this helps.

Yanmar 3GM raw water cooled?
 

"Leanne" wrote in :


How practical is it to redesign the cooling system against the
cost and the few pounds of weight. Ok, we have a large budget so
cost not a factor, but would the weight gain be that great as you
are tossing out a recalculating system that works well in cold
waters to replace it with another system of almost the same type
to do the same thing. I realize that weight or the lack of in a
ULDB is critical, but IMHO, I don't think this is a good
solution.

Leanne

from the manual the difference is 17 pounds dry.

Jean-Marie


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Yanmar 3GM raw water cooled?
 

"Leanne" wrote in :


How practical is it to redesign the cooling system against the
cost and the few pounds of weight. Ok, we have a large budget so
cost not a factor, but would the weight gain be that great as you
are tossing out a recalculating system that works well in cold
waters to replace it with another system of almost the same type
to do the same thing. I realize that weight or the lack of in a
ULDB is critical, but IMHO, I don't think this is a good
solution.

Leanne

from the manual the difference is 17 pounds dry.

Jean-Marie


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