Hello Paul & group,
Merry christmas, greetings from snowy Finland. And here's something
specially spectacular for holidays :)
http://en.wikipedia.org/wiki/Zvezda_M503
This is Zvezda M503A 4-stroke diesel, that was used on 200-ton class
missile boats. Layout is quite one-off, it's 7-bank radial with 6-cyl
inline blocks :) thus, 42 cylinders. Quoted power is ~4000 HP @ 2200
RPM. TBO is somewhere like 500 hours :)
(Translated from German wikipedia)
http://de.wikipedia.org/wiki/Swesda_M503
"Also, the engine has a turbocompound charging with three hydrodynamic
couplings.
In the lower speed range and performance exhaust energy is not
sufficient to bring the large turbocharger on the required speed, the
supercharger is driven over hydrodynamic couplings by the crankshaft -
like a compressor.
At high engine speeds, and associated high power, the turbine of the
turbocharger delivers the excess energy via the hydrodynamic clutches
directly to the crankshaft."
I try to get a service or training manual for this mega-gizmo. It's
interesting to see how they made that coupling, how much it slips, and
what's the gear ratio.
SFC isn't that great for a diesel, but then again, this is an
out-and-out military speedboat engine.
There was four Osa-II's in Helsinki on a company that offered joyrides
with them. Engine noise was so excessive that they run out of
customers... even the most bone-headed said the noise was 'murderous' :d
Cheers,
Petri
Hey Petri how are you doing? Long time no see. I am seriously thinking
of another trip to Europe this summer. I am thinking of flying into
Frankfort and drive up through Poland and the Baltic countries to Estonia.
Then take the ferry to Finland and visit everybody there.
Where are you living now?
Paul Lamar
Hello Paul. It's been quite turbulent past two years. Yes, I'm still in
Helsinki. By all means, if you have a chance, pay us a visit at next
summer :)
Cheers,
Petri
What is the weather like in May?
Paul Lamar
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