16
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Lower the pendulum rudder into the water.
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Fix the windvane hanger 110 on centre with catch 133. This will also hold the
pendulum rudder on centre and prevent it moving while the rest of the system is
being set up.
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Loosen coupling 523 by three turns and pivot it aft until it is full engaged.
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NOTE: if the coupling lever is not loosened sufficiently, it will not pivot aft and
engage with the pendulum rudder.
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CAUTION: check that the indicators on the two gear segments 380/530 are
aligned correctly.
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Retighten the coupling.
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Fit the windvane (the counterweight 120 should now be pointing into the wind).
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Release the windvane catch.
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Turn the windvane by hand or using the remote control until it is standing upright
in its centred position.
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NOTE: the windvane is only properly centred if it is standing absolutely upright It
is important to centre the windvane correctly as any errors here reduce the
effective steering range of the system on one side.
2.3.3 KEEP AN EYE ON THE COURSE
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Minor course adjustments can be made by tweaking the position of the main
rudder (at the wheel).
−
Larger course adjustments should be made at the windvane either by hand or
using the remote control (at worm gear 270).
2.3.4 ALTERING COURSE/TURNING
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First set the windvane shaft to the new course (rotate the shaft as quickly as
possible). The windvane may be adjusted either by hand or using the remote
control; the degree scale on the windvane shaft will help you find the correct
position.
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Release the main rudder and turn it onto the new course as well. Using both
rudders speeds up the turn considerably.
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Once the boat is on the new course, lock the main rudder in position again.
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Adjust the position of the main rudder until the trim is satisfactory.
2.3.5 FINE TRIM
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Weather helm grows more pronounced as the wind strength increases. Adjust the
main rudder position appropriately as conditions change.
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The windvane should work evenly around the upright position most of the time. If
it is permanently off to one side, adjust your sail trim or reef down.
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NOTE: weather helm slows you down. Sailing with too much weather helm is like
driving with the handbrake on. You can tell if your trim could/should be improved
just by looking at the wake. If there is substantial turbulence below the surface
(wash from the keel), something needs to be done!
−
CAUTION: larger, heavier boats may need to reach a relatively high boat speed
before the pendulum arm starts to move through its full lateral range.
−
The force generated by the servo system is always dependent on leverage, rudder
area and speed. These factors are the product of physical laws, the consequences
of which are inescapable!
2.3.6 OVERLOAD PROTECTION IN HEAVY WEATHER