My dad (a former supertanker captain and current marine insurance surveyor) recently got back from investigating a claim where the one of the turbocharger oil seals in one of the engines broke, leading to a runaway. Luckily, the governor was still working, so the air intakes closed before the engine seized or exploded, but IIRC, the engine was severely damaged.
So this got me reading about two-stroke diesel engines. They have an awesome power:weight ratio and diesels are more fuel-efficient, and mechanically simpler than gasoline engines. Why they aren’t used in cars, I have no idea. Most automotive four-stroke diesels have turbochargers, so the added weight of a turbo shouldn’t be an issue.
I was also reading about Bruce Crower’s invention of a six-stroke gasoline cycle, where after the 4th stroke, water is injected into the cylinder, which instantly turns to steam, both providing an extra power stroke, and cooling the engine. I’ve read that he gained a 30% increase in HP, and a 30% decrease in fuel consumption.
So I’m wondering why nobody has thought to apply this to maritime two-stroke diesels. The water needed can be taken from the desalinization system. You’ll get less fuel consumption, more power, and the engine cooling system can be eliminated. So weight and space can be saved, which can be used for more cargo, increasing a ship’s NT.