sentences:  To produce steam to power the engines, each ship had six marine-type boilers, with the exception of "Wettin" and "Mecklenburg", which had six Thornycroft boilers, along with six transverse cylindrical boilers.Steering was controlled by a single large rudder.Electrical power was supplied by four generators that each produced at 74 volts, although in "Wittelsbach" the generators were rated at .