Windpilot PACIFIC LIGHT - Transmission Ratio; Variable Force Transmission; Force Transmission with Wheel Steering: Examples; Steering Lines and the Emergency Tiller

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you tension the cord, the more the block pulls the
slack out of the steering lines.
 • Releasingthisblockprovidessufficientslackto
uncouple the snap shackles at the connection
point.
 • Theblockcanthenbeusedtore-tensionthe
steering lines once the snap shackles have been
reconnected prior to switching over to WINDPILOT
steering.
1.6.8.5 TRANSMISSION RATIO
 • Thewheeladaptorisdesignedformechanical
wheel steering systems with a range of around two
and a half revolutions from stop to stop and a wheel
diameter of approximately 60 cm/24 in. This means
in practical terms that the maximum line travel of 25
cm/10 in is sufficient to turn the wheel through half
a revolution given, perfect transmission.
1.6.8.6 VARIABLE FORCE TRANSMISSION
 • Theforcetransmissioncharacteristicscanbe
adjusted using the slot in the pendulum arm 300
(see 2.2.6.2 Determining the Ideal Settings).
1.6.8.7 FORCE TRANSMISSION WITH WHEEL
STEERING: EXAMPLES
Example 1:
 • Wheeldiameter=approx.60cm/24in
 • Revolutionsfromstoptostop=2.5
 • Positionofring315=approx.centred in the slot
Example 2:
 • Wheeldiameter=approx.100cm/40in
 • Revolutionsfromstoptostop=1.5
 • Positionofring315=towardsthebottom of the slot
Example 3:
 • Wheeldiameter=approx.55cm/22in
 • Revolutionsfromstoptostop=3-4
 • Positionofring315=towardsthetop of the slot
TEST
 • Itisactuallyquitestraightforwardtoworkout
the key parameters for your boat - see 2.2.6.2
Determining the Ideal Settings.
1.6.9 STEERING LINES AND THE EMERGENCY TILLER
1.6.9.1 MECHANICAL WHEEL STEERING
 • Connectingthesteeringlinestotheemergency
tiller of a mechanical wheel steering system will not
yield good steering because the tiller has to move
the whole of the steering mechanism from the
wrong end every time it tries to turn the rudder. It’s
like trying to turn the steering wheel of your car by
sitting in the road and tugging on the front wheels!
 • Goodsteeringcanonlybehadbythisrouteifthe
transmission components of the wheel steering
system are completely disconnected from the
quadrant (emergency).