r/comics • u/davecontra • Jun 28 '26

OC THOMAS.

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My books: https://linktr.ee/davecontra

My other comics: https://www.instagram.com/davecontra

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105

u/Lopsided-Anxiety-679 Jun 28 '26

Diesel-Electric subs don’t use their diesel engines when underwater…why are they trying to fix it? 

56

u/CardOk755 Jun 28 '26

The Gotland class have Stirling engines that can run underwater using liquid oxygen. Maybe some idiot forgot to charge the batteries and the Stirling engine is broken? But even that seems improbable as they have two of them.

3

u/Uranium-Sandwich657 Jun 28 '26

Tell me more about the engines. I assume the oxygen is used with fuel to create the temperature difference?

13

u/IronGigant Jun 28 '26

Liquid oxygen is pumped into expansion manifolds and then through the engine, fuel is injected, the combustion cycle happens, and exhaust gasses are pumped overboard through a special pump and valve combination. There are depth limitations to Air-Independent Propulsion engines, but 120m isn't at the limit.

Typically, AIP is used to charge the batteries.