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.