Patreon Bonus: Reichsmarine & Kreigsmarine eschews steam and goes all Diesel(-electric) propulsion

The opening counterfactual separates possessing an atomic weapon from delivering it, using B-29 range and the relative geography of Germany and the United States.

Sometimes, but fire-control arrangements varied and each target usually needed three or four guns, so several turrets might still have to work together.

The deliberately narrow counterfactual gives German warships diesel propulsion without assuming an entirely redesigned German war economy.

The Deutschland class, submarines, torpedo boats, and the diesel-and-steam Königsberg and Leipzig classes make an all-diesel fleet less speculative than it first appears.

Even if Germany struck Britain with a nuclear weapon, likely American retaliation and fear of technology transfer to Japan would prevent a German strategic victory.

In this escalation thought experiment, 1939-40 Britain lacks earthquake bombs but possesses chemical weapons that could be used in retaliation.

Removing the combined steam-and-diesel plant could shift machinery and superstructure aft, potentially making room for a fourth turret or a more useful minelayer-cruiser design.

The 1932 minelayer Bremse is used to show that Germany could already combine diesel machinery, useful speed, range, armament, and mine capacity in a substantial hull.

A more heavily armed German light cruiser matters less as a direct British threat than as pressure on France, Italy, and the treaty limits shaping later cruiser programmes.

A German diesel destroyer might trade a small amount of maximum speed for materially greater cruising endurance than contemporary steam designs.

The unfinished Z51's planned six diesels and three shafts provide a late-war German model for combining high speed with long-range diesel cruising.

Using Bremse's smaller engines and Z51's shaft layout, an early-1930s German diesel destroyer might approach 35 knots while retaining long range.

The video distinguishes a technology's first appearance from the point at which it can be reliably operated in a saltwater warship.

The Deutschland class links Bremse's early diesel machinery to the larger engines later planned for Z51, showing how much power Germany had already installed in a surface combatant.

Diesel-electric drive was technically plausible, but the exercise retains mechanical gearing because German surface-warship designers pursued that path.

The three-shaft Scharnhorst class is the point where a diesel conversion could turn an already fast capital ship into a much longer-range strategic problem for Britain.

Steam turbines delivered high power through a familiar, widely adopted system, while diesel required navies to invest in a different path that competitors were not yet following.

Likely yes: each engine could occupy its own compartment, so losing one would reduce power rather than disable the whole plant, although shared gearing and shafts would remain vulnerable.

Only modest external changes would be needed; the substantial redesign would be the internal machinery layout.

A diesel-powered Admiral Hipper class would replace a notably inefficient steam plant with the endurance needed to join Germany's other long-range surface raiders.

Bismarck's roughly 150,000-horsepower requirement is demanding, but a twelve-engine, three-shaft plant becomes conceivable after a decade of sustained marine-diesel development.

Choosing the Königsberg class as the starting point moves diesel development back to the mid-1920s and gives later German designs far more time to mature.

Longer range lets German capital ships, cruisers, and destroyers operate together as offensive groups at oceanic range.

German task forces would force Britain to redesign convoy routes and escorts because corvettes built for anti-submarine work could not stop battleships, cruisers, and destroyers.

If German light cruisers already combine speed with 10,000-nautical-mile endurance, the slower Deutschland commerce-raider concept would need to be redesigned.

Long-range escorts turn the Denmark Strait counterfactual from a four-capital-ship encounter into a larger fleet action involving cruisers and destroyers on both sides.

A diesel fleet could draw on Germany's synthetic-fuel and refining potential more readily than a fuel-oil fleet, but it still competes for limited industrial resources.

A Royal Navy facing fast German task forces would need more carrier-backed hunting groups and additional capital ships able to catch them.

Long-range German destroyers could prompt a pre-war British and Canadian sloop programme armed with rapid-firing dual-purpose guns.

Britain would likely build more carriers because aircraft are the fastest way to locate, shadow, and slow dispersed German task forces.

More capable German cruisers could push France toward heavier ships, raise treaty displacement limits, and encourage Japan and Britain to build more large destroyers.

German long-range cruisers reinforce established American interest in powerful cruiser-killers and could also raise interwar carrier allowances.

British attacks on diesel production and the Royal Navy's larger force would continue to constrain Germany even after the propulsion change.

Longer-ranged destroyers might escape Narvik without waiting for a tanker, while German heavy ships could begin the war scattered on distant commerce-raiding missions.

It could work as a counterfactual design, but its likely effect is to encourage renewed cruiser-killer and fast-battleship concepts rather than settle the problem cleanly.

Britain would lean on its worldwide bases and existing fleet oilers, while spending more on protecting key imperial ports from raider attacks.

Diesel engines improve the ships Germany can build, but they do not restore the yards, docks, workforce, or procurement priority needed for a much larger fleet.

Not for convoy escort: escort carriers need to stay with the convoy, while faster fleet carriers would be required to search for and strike raiding task forces.

Germany's geography and continental security problems continue to place the army and air force ahead of the navy, regardless of propulsion efficiency.

No. Britain would still possess the larger navy and could concentrate against the convoy and its escorts, so diesel endurance would not remove the blockade.

Yes, but the counterfactual assumes Germany shifts early investment toward diesel refining and stocks; that makes the fleet more feasible, not unconstrained.

Britain could still win, and American involvement would remain likely because the United States would already be fighting Japan and supporting Britain, though the route would differ.