The MAN-B & W GB/GBE range of uniflow-scavenged two-stroke crosshead engines represents the latest step in the development of the G series. The Authors, of B & W Diesel A/S, Copenhagen, give some general information on the series, describe the design features of the GB/GBE range (the dominant design parameter is a higher firing pressure), and give an account of the extensive test-bed trials of the Mitsui-built prototype GB/GBE engine, a 6L90GB/GBE (six cylinders, 900 mm bore, 2180 mm stroke). The engine was tested in both the GB and the GBE versions, the latter having an exhaust-gas bypass (this arrangement is illustrated). Representatives of nine classification societies signed the official Type Approval Test Report. The article includes drawings of the L90GB/GBE engine together with Performance curves from the tests. The programme for the GB/GBE range, shown in a table, includes engines with a bore/stroke of 900/2180 mm (as in the prototype), 800/1950 mm, 670/1790 mm, 550/ 1380 mm, and 450/1200 mm, all with 4 to 12 cylinders. Data given for the L90GB include a flexibility range of 15-12.8 bars mep, 97-79 rpm, 4570-3170 bhp/cylinder, and 131-128g/ bhp-hr specific consumption; those for the L90GBE show a lower mep, with lower bhp/cylinder and 128-125 g/bhp-hr specific consumption.

  • Supplemental Notes:
    • Motor Ship, 63 <1982>, p.37 <June> (7 pp., 2 tab., 6 graphs, 8 diag., 1 phot.)
  • Authors:
    • Tsalapatis, D
    • Meier, J
    • Pedersen, P S
  • Publication Date: 1982


  • English

Subject/Index Terms

  • Subject Areas: Marine Transportation;

Filing Info

  • Accession Number: 00684254
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM