[TigersEye]

That's pretty cool. An engine so big it has ladders inside the crankcase. Whew!

I wonder if its 300 ton crankshaft was made in one casting like an automobile crankshaft? And the lathe that ground its journals must be something too.

[Quick Shot]

Yes, they have doors into the crankcase area, and fire suppression systems inside the crankcase. At 100 RPM one can go in the crankcase while it is running. The engine heads and cylinders are individually replaceable.... ie one does not need to pull the entire engine.
The pictures of these engines are great, they the leave one little ant looking human in the picture.