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Twin-screw steamer

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A twin-screw steamer (or steamship) (TSS) is a steam-powered vessel propelled by two screw propellers, one on either side of the plane of the keel.[1]

Arrangement

All propellers produce a transverse thrust, also called screwing effect or starting bias, which gives a tendency for end of ship to move sideways. In a twin-screw ships the port propeller is usually left-handed and the starboard right handed to cancel out the transverse thrust thus avoiding propeller walk.[2]

References

  1. ^ "Maritime Acronyms and Abbreviations". Royal Institution of Naval Architects. TSS. Archived from the original on 19 August 2016.
  2. ^ Danton, Graham (31 October 1996). "The Principles of Ship Handling". The Theory and Practice of Seamanship. Routledge. pp. 51–55. ISBN 978-0415153720.


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