Japanese 45,000 tons 30 knots speed battleship design No. B by Yasushi Taji in 1919

Ise-class. ©Warshipsresearch.blogspot.com

45,000 tons 35 knots 5x2-15" guns design. ©Warshipsresearch.blogspot.com.

Nagato-class. ©Warshipsresearch.blogspot.com

Full load displacement 45,000 tons. Speed 30 knots. Horsepower for deep condition 140,000 shp. Dimensions 812.0 (between Perpendiculars)-850 (on deep waterline) x 33 feet. Weight armament 7,600 tons. Weight protection 9,500 tons. Total weight armament and protection 17,100 tons. Armament 4x2&2x3-15” guns, 16-6” guns, 2-21” guns. Protection consisted of: waterline belt 9” (maximum)-6” (intermediate)-4” (fore and after). Upper armour 6”. Battery armour 6”. Barbette armour 10”. Conning tower 10”. Protective deck 2”. F'esk or upper deck 2”. Underwater protection 1.5-2.25”.

The Ise-class preceded by Fuso-class succeeded by Nagato-class, built between 1915-1918 had a normal displacement of 1,762 tons , dimensions 683 x 94 x 29.4 feet, main armament of 6x2-35,56cm/14” guns, horsepower 40,000-45,000 shp and a speed of 23 knots.

The Nagato-class preceded by Ise-class succeeded by planned Tosa-class built, between 1917-1921 had a displacement of 32,720 (standard)-39,116 (full load) tons, dimensions 708 (over all) x 95.3 x 29.9 feet, horsepower 80,000 ship and speed26.5 knots.

Source

Hiraga Archives. An article titeld “The mutual influence of speed, armament, and protection on the battleship design”, written by Constructor-Lieutenant Yasushi Taji, 1929