At a full load, the high and medium-pressure turbines ran at 2,825 rpm, while the low-pressure turbines ran at 2,390 rpm. The ships' turbines were powered by twelve Wagner ultra high-pressure, oil-burning water-tube boilers. Bismarck and Tirpitz were originally intended to use electric-transmission turbines that would have produced 46,000 shp (34,000 kW) apiece.