How would radiation-free heat-source propulsion affect the First World War and Germany's submarine campaign?
Short answerIt would free major British coal and rail resources, change fleet fuel choices, strengthen exports, and even alter how merchant cargoes absorbed mine and torpedo damage.
NotesThe follow-up moves the hypothetical heat source from machinery spaces into Britain's national logistics system. Scapa Flow would no longer require Jellicoe's heavy coal-train flow, releasing crews, locomotives, track capacity, and raw materials even if specialized coal wagons had limited alternative uses. Scarce heat sources fitted only to capital ships could still push oil toward cruisers and destroyers earlier by relieving demand elsewhere. Britain might export more high-quality coal, reduce wartime borrowing, and send outbound merchant ships with protective coal cargoes that absorb some blast effects from mines and torpedoes. The exchange shows how a propulsion change can reshape railways, trade, finance, and shipping protection far beyond fleet endurance.