Comments by "" (@RedXlV) on "The Drydock - Episode 188" video.
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N3 was chosen because compared to L3 she's 9 meters shorter and nearly 3000 tons lighter, while having the same armament and armor. Even when you don't have any treaty-imposed size limits, if you can reduce weight without any change to combat ability, that's worth doing because the smaller ship will cost less and take less time to build.
As for if an L3 had been built (either there's no treaty, or Britain somehow managed to pull a Dreadnought by laying her down immediately in 1920 and having her already in service by the time the Washington Naval Conference began in November 1921), she'd probably have been refitted along similar lines to Queen Elizabeth, Valiant, and Renown, with new boilers and turbines, a line of QF 4.5" BD Mk II twin turrets down each side of the superstructure, etc. Given that she probably wouldn't need to add large torpedo bulges, what with her postwar design already having better torpedo protection than the QEs, I imagine that L3 might gain some speed in that refit. Probably not quite able to keep pace with the KGVs when they're steaming at full speed, but 27 knots wouldn't be out of the question.
This would definitely be a ship that Bismarck doesn't want to run into.
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