Continuing the 41cm armed versions of the Yamato class battleships preliminary designs, the J2 similarly to J1 and J0 was a light modification of the previous designs:





On this design the same layout was maintained and like in J1 the hull length was further increased by 11 meters to 255meters waterline and beam by 1,9 meters to 38,5 meters. Together with an increase of power plant by a mere 5,000shp to 135.000shp, the maximum speed could further be increased to 54km/h or 29knots with only a slight 1030tons increment in displacement. Otherwise the design is the same as the previous J0 or J1.











Combined Steam and Diesel propulsion, hanger aft for 6 floatplanes and a ramp to transport said planes to the aircraft handling area, 2 catapults.







Dimensions: 255 (wl) x 38,5 x 10,2m

Displacement: 54.030tons (standard)

Armour: 155mm Deck, 380mm Belt (Immunity against own 41cm shells between 18.000 and 27.000m) inclined to 20 degrees

Engines: 135.000shp, 4 shafts, Combined Steam Turbines (70.000shp) and Diesel engines (65.000shp)

Speed: 54km/h (29knots)

Range: 13.300km at 30km/h (7.200nm at 16knots)

Armaments:

3x3 41cm/50 Type 90 Cannons,

3x3 15,5cm/60 Type 90 Guns

6x2 127mm/40 Type 89 DP-AA guns

12x2 25mm/60 Type 96 AA Guns

6x Seaplanes (I choose Nakajima E8N Dave and Aichi E10A Hank planes)



Data table showing the various variants: i.imgur.com/zsBKwfN.jpg

mltr.ganriki.net/faq08p14e22b2… The design had the following characteristics:Dimensions: 255 (wl) x 38,5 x 10,2mDisplacement: 54.030tons (standard)Armour: 155mm Deck, 380mm Belt (Immunity against own 41cm shells between 18.000 and 27.000m)Engines: 135.000shp, 4 shafts, Combined Steam Turbines (70.000shp) and Diesel engines (65.000shp)Speed: 54km/h (29knots)Range: 13.300km at 30km/h (7.200nm at 16knots)Armaments:3x3 41cm/50 Type 90 Cannons,3x3 15,5cm/60 Type 90 Guns6x2 127mm/40 Type 89 DP-AA guns12x2 25mm/60 Type 96 AA Guns6x Seaplanes (I choose Nakajima E8N Dave and Aichi E10A Hank planes)

The design features the common elements of all previous proposals: