IJN Battleship Design A-123
While A-121 and 122 were the fast versions of the Tosa preliminaries or more like fully armoured battlecruisers (like how the RN described HMS Vanguard! ) A-123 was a return to the acceptable size of the IJN shipyards and normal fleet speed of 50km/h or 27knots. Essentially A-123 was the slow version of the previous two proposals with a very similar casemated deck layout and turret arrangement.
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: 36.600tons (standard)
Armour: 229mm Belt inclined at 25 degrees, 76mm Deck, 51mm at Machinery 76mm at Magazine Slopes
Engines: 90.000shp 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/9c7f56e6-a80a-45bf-903c-55d5bbfaefe0#?c=0&m=0&s=0&cv=0&xywh=-1988%2C0%2C10918%2C4927
