The Magnus-Effect, whereby a cylinder rotating in a fluid flow generates lift, has been adopted in the U.S. as the basis of a new rudder which offers promise of improved low-speed steering. The rudder consists of a cylinder having circular end plates. As the vessel moves ahead or astern, a turning force at right angles to the direction of water flow can be generated by rotating the cylinder. The direction of the turning force can be altered by reversing the rotation of the cylinder, so that it acts as a rudder. The Magnus-Effect rudder can produce a very strong turning force with a minimum of drag, which results in more efficient steering while maintaining propulsion efficiency. There is very little braking effect such as is found with a conventional rudder. It needs only sufficient power to overcome bearing and friction forces and can develop maximum turning force or return to zero in a few seconds. The new type of rudder is being retro-fitted to a 3,700 hp twin-screw river push tug in the U.S. The Magnus-Effect rudder has been developed by T.B.W. Industries Inc. of Houma, Lousiana, and once field trials are complete the firm plans to offer production designs. The rudder is suitable for all types of tug where good steering is required at low speeds and it would greatly improve the handling of VLCCs and other large, unwieldy ships, particularly at slow speeds when entering harbour. Order from BSRA as No. 54,736.

  • Corporate Authors:

    Reed (Thomas) Industrial Press Limited

    36/37 Cock Lane, Saracen's Head Building
    London EC1A 9BY,   England 
  • Authors:
    • Pike, D
  • Publication Date: 1980-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00330011
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM