IJN Battleship Design A-124
Design A-124 uses the same hull dimensions and main armament layout as A-123 but a on a different hull shape especially aft where it is more fuller and different casemated layout for the secondary 14cm guns moving most of them one deck up to provide better firearcs and less effect from the ocean. Integrally the armour layout copies that of the Nagato with 305mm belt armour which weren't inclined contrary to A-123's 229mm and 25 degrees.
The design had the following characteristics:
Dimensions: 213,36 (pp) x 227,08 (wl) x 229,51 (oa) x 30,48 x 9,14 meters
Displacement: 37.200tons (standard)
Armour: 305mm Belt, 70mm Deck, 76mm Slopes
Engines: 91.000shp Gihon Steam Turbines, 4 shafts
Range: 10.200km at 30km/h (5.500nm at 16knots)
Speed: 50km/h (27knots)
Armaments:
5x2 410mm/45 Type 3 / 3rd Year Type Cannons,
20x1 140mm/50 Type 3 / 3rd Year Type Guns,
4x1 76mm/40 Type 3 / 3rd Year Type AA Guns,
4x1 53cm Above Water Torpedo Tubes
Official drawing:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/bfa4aa40-66f4-48dd-9f4d-7f77cb41edcd#?c=0&m=0&s=0&cv=0&xywh=3543%2C954%2C1224%2C552
Comparison table between A-124, B-61, Fuso and Hiei:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/92cdfb52-21f7-4942-98e3-643167773975#?c=0&m=0&s=0&cv=0&xywh=-1118%2C-274%2C9179%2C5475
Armour layout comparison:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/7e13a22b-a72e-41c3-9a0e-77d93e1c209a#?c=0&m=0&s=0&cv=0&xywh=-1089%2C307%2C9179%2C5475
A-124' was a simple alteration of the previous A-124 design with the only change of 4 extra underwater torpedo tubes but consequently a 9m extra length 600tons more displacement and a mere 1.000shp more engine power to maintain the desired speed. Armour scheme remained the same, a half-all or nothing style where the belt only covers the machinery and magazine spaces but the deck armour goes all the way to the ship ends. The closely spaced twin funnel arrangement remained the same as on A-124 and no other visible serious changes made.
The design had the following characteristics:
Dimensions: 222,5 (pp) x 236,2 (wl) x 238,66 (oa) x 30,48 x 9,14 meters
Displacement: 38.800tons (standard)
Armour: 305mm Belt, 70mm Deck, 76mm Slopes
Engines: 94.000shp Gihon Steam Turbines, 4 shafts
Range: 10.200km at 30km/h (5.500nm at 16knots)
Speed: 50km/h (27knots)
Armaments:
5x2 410mm/45 Type 3 / 3rd Year Type Cannons,
20x1 140mm/50 Type 3 / 3rd Year Type Guns,
4x1 76mm/40 Type 3 / 3rd Year Type AA Guns,
4x1 53cm Underwater and 4x Above Water Torpedo Tubes
Official drawing:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/c7e5c782-0647-4785-bc74-0e74ead04e43#?c=0&m=0&s=0&cv=0&xywh=2639%2C422%2C1469%2C663
Comparison table between A-124', B-61, Fuso and Hiei:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/92cdfb52-21f7-4942-98e3-643167773975#?c=0&m=0&s=0&cv=0&xywh=-1118%2C-274%2C9179%2C5475
Armour layout comparison:
https://iiif.dl.itc.u-tokyo.ac.jp/repo/s/hiraga/document/7e13a22b-a72e-41c3-9a0e-77d93e1c209a#?c=0&m=0&s=0&cv=0&xywh=-1089%2C307%2C9179%2C5475
