 "Queen Elizabeth 2" was originally fitted out with a steam turbine propulsion system utilising three Foster Wheeler E.S.D II boilers, which provided steam for the two Brown-Pametrada turbines.The turbines were rated with a maximum power output figure of 110,000 shaft horsepower (normally operating at 94,000 hp) and coupled via double-reduction gearing to two six-bladed fixed-pitch propellers.The steam turbines were plagued with problems from the time the ship first entered service and, despite being technically advanced and fuel-efficient in 1968, her consumption of 600 tons of fuel oil every twenty four hours was more than expected for such a ship by the 1980s.