Similarly when the jack plug is inserted in wet
cockpit conditions, extreme care should be taken to
ensure that the plug is kept dry. Occasional
lubrication of the jack plug
help to minimise problems of water intrusion. Once
the jack plug has been inserted, the connection is
The wind vane transducer mounting mast is normally
clamped centrally to either a vertical or
f the after pulpit using the 'U'
clamps provided. In the event of an after pulpit
not being fitted the mounting flange may be bolted
directly to a suitable vertical face. Care must be
taken to ensure that the wind vane transducer is in
acks and not too close to the
deflected air stream from the mainsail. This is
normally ensured by situating the mounting mast
centrally behind the backstay and by elevating the
wind vane at least 2ft (60cm) above the highest
deck obstruction.
Feedback linkage
The autopilot operates on the principle of
mechanical feedback between the sensors and the
rudder to correlate corrective rudder action with
To complete installation of the wind vane
attachment, the feedback drive cord emerging f
the base of the mounting mast must be connected to
the pushrod. You will see that when the feedback
cord is pulled out of the mounting mast against
spring tension, backlash free rotational movement
of the wind vane transducer results.
Two small blocks
are provided for leading the
feedback cord to the tiller. Normally only one
block is necessary to obtain a clear run out but .
occasionally two blocks may be necessary to avoid
obstructions such as the mainsheet. The final
fairlead should be positioned aft
unit as shown so that the final run of the feedback
cord is orientated nearly at right angles to the
tiller. It is important that the final fairlead is
positioned below the centreline of the pushrod so
that the spring tension on the cord h
to pull the pushrod down onto the tiller pin.
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