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Rotor Bow Rudder

Van der Velden’s rotor bow rudder system has been developed specifically for vessels with large wind surface areas, such as container vessels and motor barge push combinations. The rotor bow rudder system is based on the Magnus effect, whereby a pressure differential is generated by placing a rotating cylinder in oncoming water currents. This results in a thrust force that is larger than a conventional rudder as well as significant enhancement in manoeuvrability. The RMS 2000 system is available in vertical and retractable versions and offers major advantages on meandering rivers and during (cross) winds. The rotor cylinder is made of high quality, corrosion-free composite materials.


  • The low weight of the system enables the rotation direction to be changed quickly
  • Optimal manoeuvrability of the bow
  • Excellent dimensional stability prevents any permanent damage when hitting objects under water
  • Frequency control engineering makes it possible to switch seamlessly from low to high speeds (and vice versa)
  • Possibility to steer from port to starboard in only a few seconds
  • Less vulnerable than conventional bow rudder systems
  • The rotor swings back into the container if the vessel runs aground (RMS 2000)
  • The rotor automatically retracts if the vessel runs aground (RMS 2000 V)


RMS 2000 – retractable version

  • Suited for application in small spaces, such as a double hull
  • Hydraulic propulsion

RMS 2000 V – vertical version

  • Compact version
  • Suitable for vertical installation
  • Frequency controlled electromotor