Following Sea Behavior

 RotorSwing Stabilizers fights Following Sea!

Roll damping with RotorSwing while fighting following sea.

Roll damping with RotorSwing while fighting following sea.

Following sea refers to a wave direction that matches the heading of the boat.

RotorSwing not only functions extremely well while cruising and with reduced maneuvering speeds, but also while battling a following sea.

We all have been there... Our plotted course is just slightly in discrepancy with our accompanying waves.  The yacht is being placed, for a very long time, in a highly uncomfortable angle.  Most fin stabilizer are unable to perform well in this type of following sea.  Gyro stabilizers are no use at all because they only function while the ship has a certain amount of roll velocity!

There are two reasons why RotorSwing functions extremely well while "hanging" on a wave:

First of all, the rotors generate a continues lift force due to their extended position outside the vessel (large moment arm) which levels the yacht back as close as possible to a straight horizon.

Secondly, the roll sensor in many stabilizer systems react on the basis of angular velocity.  If there is no such angular velocity, which is often the case in following sea, there will be no signal send from the controller to the stabilizing system.  We will keep on hanging...  RotorSwing has developed the unique 3-Term+ Control Algorithm, measuring not only the roll angle, but also include:

  • Roll Velocity
  • Roll acceleration
  • Jerk

Following sea has been successfully addressed by RotorSwing Marine.

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