Simrad AP26 and AP27 Autopilots
Rudder sets the rudder gain which is the ratio between the commanded angle and the heading error.
Course to steer
Too little Rudder
Course to steer
Too much Rudder
•Too little Rudder and the autopilot fails to keep a steady course.
•Too much Rudder gives unstable steering and reduces speed.
•Low speed requires more Rudder than high speed.
Counter Rudder is the parameter that counteracts the effect of the boats turn rate and inertia. For a short time period it is superimposed on the proportional rudder response as provided by the heading error. It may sometimes appear as if it tends to make the rudder move to the wrong side (counter rudder).
The best way of checking the value of the Counter Rudder setting is when making turns. The figures illustrate the effects off various Counter Rudder settings.
New course
Counter rudder setting too low, overshoot response
New course
Counter rudder setting too high, sluggish and creeping response
106 | 20221586B |
