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MANEUVERING HIGHLY TURBOCHARGED MEDIUM-SPEED ENGINES DRIVING FIXED PITCH PROPELLERS

MAN has devised an improved braking system, in which the engine develops a high retarding effort, by permitting compressed air to reach the cylinder starting valve through the timed pilot valve. The master starting valve remains closed. With this method, since the starting air pipe is not under pressure, considerably more air from the cylinder can leave through the starting air pipe, via the venting valve, during the compression stroke. This blow-down reaches a maximum shortly before the piston is at its highest point and piston movement almost nil. During this time most of the air pressure in the cylinder is relieved through the starting air pipe and vent valve, so that during the following expansion stroke there is little pressure to provide expansion work. With this system a typical ship is brought to rest in 200 sec as against some 275 sec while the head reach has been reduced from 1040 to 564 m, a reduction in stopping distance of approximately 30%.

  • Corporate Authors:

    Whitehall Technical Press Limited

    Wrotham Place
    Wrotham, Sevenoaks, Kent ME14 1PE,   England 
  • Publication Date: 1970-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00005912
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 25 1972 12:00AM