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What is the limiting angle of the rudder movement?

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  • What is the limiting angle of the rudder movement?

    What is the safe limiting angle for rudder movement on port and stbd side. Why this value?

  • #2
    The limiting angle is 35deg. on port and stbd side. Rudder angle is normally restricted to within 35 degree to port and starboard to avoid stalling effect of rudder and to maintain high lift to drag force ratio. Beyond 40 degree of rudder angle, the drag force increases rapidly and lift force drops rapidly resulting in the stalling of rudder leading to steering loss.

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    • #3
      The safe limiting angle for rudder turning to port and starboard is 35deg. the reason is to restrict the increase of drag force, and to avoid stalling effect simultaneously maintain lift force . even as Senior Anish has said.

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      • #4
        I agree with guys above. Also remember that sometimes with max.speed of vessel, this value may be reduced. 35degrees you also find in Regostry Rules (DNV, ABS etc.)

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