The paper describes an engine designed to develop 2500 hp per cylinder at 300 rev/min combining many of the advantages of slow speed direct drive and medium speed geared marine engines. In four to seven cylinder configurations it will cover a range of powers from 10000 to 70000 hp as a geared marine propulsion plant, and will also be suitable for stationary generating applications for station loads from 7-100 MW, all with a single size of cylinder. The unique advantages of opposed piston engines which enable such a range of engines to be designed with low stresses, good balance and four point support are examined. The design considerations relating to air flow, combustion, thermal stresses, gas and inertia loads, crankshaft and crosshead bearings, alignment and frame rigidity, torsional vibrations, control and monitoring are all discussed. The constructional details of the engine are described and illustrated both by drawings and photographs with particular reference to the novel features such as the auxiliary blower drive, piston and liner cooling arrangement, engine frame, connecting rod, crosshead and crankshaft construction, detuner and expansion chocks. The production and transport facilities, quality control and service potentialities are explored. The presentation of the paper will be supported by test results from the 4-cylinder prototype engine.

  • Availability:
  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Butler, J F
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00035208
  • Record Type: Publication
  • Source Agency: United States Merchant Marine Academy
  • Files: TRIS
  • Created Date: Oct 27 1973 12:00AM