Naval Historywith Dr. Alex

Q&A · 2:38:21-2:39:08

Sterling-engine submarines and the XLUUV route to an SSK

Why British submarine studies often preserve a conventional option and how an extra-large uncrewed vehicle could fill part of that role.

Air Independent PropulsionRoyal NavySskSSNSubmarinesXLUUV
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Question

Could the Royal Navy build a future submarine with a Sterling engine?

Short answer

Yes; British studies often keep an SSK option in view, and a Sterling-powered XLUUV could provide part of that capability without replacing the SSN fleet.

Notes

British design studies are expected to continue comparing a conventional submarine with a nuclear boat for the same broad requirement. A Sterling-engine SSK offers a force-multiplying option where the range and speed of an SSN are not essential. An XLUUV could be a politically easier way for a wealthy navy to acquire some conventional-submarine functions without openly substituting SSKs for nuclear attack boats. A future variant could use Sterling-based air-independent propulsion. Britain still needs SSNs for global endurance, so a cheaper conventional or uncrewed layer should supplement rather than displace them.