former aft boiler room, and the forward funnel was removed. The Brown-Curtis turbines were replaced by four geared Kanpon turbines with a designed output of . On her trials, Yamashiros sister ship Fusō reached a top speed of from . The fuel storage of the ship was increased to a total of of fuel oil that gave her a range of at a speed of . Armament The twelve 45-calibre 14-inch guns of Yamashiro were mounted in six twin-gun turrets, numbered one through six from front to rear, each with an elevation range of −5 to +30 degrees. The turrets were arranged in an unorthodox 2-1-1-2 style with superfiring pairs of turrets fore and aft; the middle turrets were not superfiring, and had a funnel between them. The main guns and their turrets were modernized during the ship's 1930 reconstruction; the maximum elevation of the main guns was increased to +43 degrees, increasing their maximum range from . Initially, the guns could fire at a rate of 1.5 rounds per minute, and this was also improved during her first modernization. Originally, Yamashiro was fitted with a secondary armament of sixteen 50-caliber 6-inch guns mounted in casemates on the upper sides of the hull. Each gun could fire a high-explosive projectile to a maximum range of at up to six shots per minute. She was later fitted with six high-angle 40-caliber three-inch AA guns, in single mounts on both sides of the forward superstructure and both sides of the second funnel, as well as on both sides of the aft superstructure. These guns had a maximum elevation of +75 degrees, and could fire a shell at a rate of 13 to 20 rounds per minute to a maximum height of . The ship was also fitted with six submerged torpedo tubes, three on each broadside. During Yamashiros modernization in the early 1930s, all six three-inch guns were removed and replaced with eight 40-caliber 127-millimeter dual-purpose guns, fitted on both sides of the fore and aft superstructures in four twin-gun mounts. When firing at surface targets, the guns had a range of ; they had a maximum ceiling of at their maximum elevation of +90 degrees. Their maximum rate of fire was 14 rounds a minute, but their sustained rate of fire was around eight rounds per minute. The improvements made during the reconstruction increased Yamashiros draft by ; the two foremost