Diesel engines need air, submarines run underwater, so how do diesel submarines work?

If diesel engines need air for combustion, then how can submarines use them? Here's what you need to know about the clever engineering behind diesel subs.
SlashGear

What Were Hit-And-Miss Engines Used For And How Do They Work?

The original concept of combustion engines as we understand them dates as far back as the late 1800s. And while they are more or less a solved science today, they definitely didn't start that way.
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Twin turbo setup: What it is and how it works

Twin turbo systems explained: how they work, why V6 and V8 engines use them, real-world performance gains, and when twin ...
SlashGear

How Does Northern Tool's Small Engine Repair Service Work?

Any given garage or workshop can house a multitude of different small, diesel engine-powered implements, such as log splitters. The annoying thing about these many small engines is that, much like the ...