A coal-burning steamship ferry of some 400-feet in length, the car and passenger RoRo SS Badger, was amazingly still in commercial operation on Lake Michigan last summer after fifty-nine years, but whether she’ll make her sixtieth anniversary depends upon the US Environmental Protection Agency (EPA).
SS Badger: Photo courtesy of Lake Michigan Carferry Service
Presently the last coal-feed steamship in operation on the Great Lakes, the Badger was honoured, amongst many organisations, by the American Society of Mechanical Engineers as a ‘Historic Mechanical Engineering Landmark’. The citation reads:‘The two 3,500-HP steeple compound unaflow steam engines powering SS Badger represent one of the last types of reciprocating marine steam engines. Built by the Skinner Engine Company, most unaflow engines are single expansion. These feature tandem high-and-low-pressure cylinders separated by a common head. The Badger’s four Foster-Wheeler Type D marine boiler... [More]
A RoRo ferry ordered by Italian ferry operator Visemar from the Cantiere Navale Visentini shipyard near Venice, is to be equipped with a complete MAN propulsion package, powered by a pair of 9L32/44CR medium-speed diesel engines.
Visemar RoRo Ferry: Image courtesy of MAN Diesel & Turbo
MAN Diesel & Turbo optimised the propulsion system for the new RoRo, which includes MAN Alpha CP propellors (driven through Renk low friction gearboxes) in close consultation with the shipyard and NAOS, the Italian RoPax ship-design specialist. These project-specific propellors deliver a very high propulsive efficiency, leading to substantial fuel-oil savings for the complete propulsion plant.Main EnginesThe 9L32/44CR engines, which comply with IMO Tier II exhaust gas emission regulations, each develop 5,040 kW at 750 rpm and are complemented by 2 × Renk RSV 900C gearboxes and 2 × Alpha CPP propellers.These engines use the latest MAN Diesel & Turbo common rail technology which all... [More]