On the Engines of Standard Cargo Ships after the War

Abstract

As the standard cargo ship after the war, selecting three kinds of vessels ; 6, 000 tons gross for the ocean liner, 3, 000 tons gross for near sea and 1, 000 tons gross for the coaster, the author studied the economical propelling machinery for each of them, under the present circumstances of Japan. Adopting the water tube boiler and the steam turbine and elevating properly the steam pressure and temperature, we can reduce the fuel consumption about 16% and machinery weight about 1930% as compared with the hitherto generally adopted practice of the cylindrical boiler and the steam turbine or the cylindrical boiler and reciprocating engine, and initial costs are not different. Moreover the author recommends electrification of the auxiliary machineries. To stick to the cylindrical boiler and the reciprocating engine on account of its safety even to-day, is the same idea to use the paper lamp instead of the electric lamp to-day. Such prejudice should be also corrected that the steam turbine is inferior to the reciprocating engine in maneuvering property as the astern power of the former is less than that of the latter.
As reference the author described the diesel engine plan for 6, 000 tons ocean liner.