A Closed-loop, External Combustion, Thermal Exchange Engine. Perfect for submarines because it doesn't require air or exhuast to run.

The Stirling external combustion engine has fascinated gear heads since its inception, and while the technology has never enjoyed widespread commercialization, there’s a vibrant community of ...

Because of that, they took a back seat to other competitors, mainly steam and the new internal combustion engine. Stirling engines were confined to low power applications, such as ventilators ...