Anatomy of Yamato

9. Engine Power
A system of four steam turbine engines, with a staggering 150,000 horsepower, propelled the massive ship. Twelve boilers, heating steam to 700°F, fed the four engines, which then moved an array of propellers. Each propeller blade was nearly three times as long as a man of average height. At Yamato's maximum speed of 32 mph, the propulsion system consumed 70 tons of fuel oil every hour.