Big 2 Stroke Engine

[TomC]

The biggest engine in the world is a Wartsilla 96C with 38" bore and 98" stroke-that works out to be 111,143cu/in per cylinder compared to our 71 or 92cu/in per cylinder.  When running at it's top speed of 102rpm, that works out to be the same piston speed as if our engines (both series with 5" stroke) were running at just under 2,000rpm.

It is interesting to note that these ultra large engines are a close cousin in design to out 2 strokers.  They do have electronic common rail fuel injection, no blower-but turbocharged (the piston movements from the other cylinders provide what the blower would normally do).  I just wonder how our 2 stroke engines would do if they had electronic common rail injection?  Just how clean burning would they be?

Next time you go to the gym, sit on an Exercycle and bring up rpm readout.  Now pedal up to 102rpm and imagine that huge piston going the same speed going up and down just over 8ft!  Amazing.  Good Luck, Tom

[stevet903]

Some specs:

http://en.wikipedia.org/wiki/W%C3%A4rtsil%C3%A4-Sulzer_RTA96-C

Here are some pics- Amazing!!

http://people.bath.ac.uk/ccsshb/12cyl/

Steve

[robertglines1]

I helped build a Wartsilla plant several years ago at Mt. Vernon Ind..It has since closed the engines they built there were only 10,000 hp @6oo rpm..used on ships for power generation..they were massive..the oil pan was the frame for the engine..Can't imagine the big ones..these could be hooked in serries...one person could move them...they had a system sttached to frame that made a tight seal between floor and engine...lifted it with compressed air;3 inch supply hose: floor was that smooth..engine was about 20 ft long and 7 ft tall..just triva   Bob