8
12
April 2019
How to Set-up Rudder Throw
Power-up Tx/Rx
If necessary, select model number as described above
Using the
Function
set-up menu go to
End points
The default should be
Ch 1
(Rudder) in left hand column
Push rudder stalk to left and hold, rudder should follow
Using
UP/DOWN
button, fine tune rudder position so that it aligns with pre-set 35 degrees guide
Move rudder stick to right and repeat tuning in right hand column
Long
CANCEL
to register these settings and index out to main menu with short
CANCEL
s
Check to ensure you have selected the correct model.
Check rudder throw and ensure rudder is
in mid ships position
Power off
Rudder Mid-Point and Weather Helm
It is not uncommon in a steady breeze for the DF65 to sail to windward perfectly balanced (ie. no
rudder adjustment necessary) on one tack but to have a marked tendency to round-up on the other
tack ie. weather helm. This may be due to asymmetrical sheet settings and this should be checked,
particularly the position of main sheet bridle on both tacks. It may also be due to the rudder being
slightly off centre. This mid-point can be reset during racing by the rudder trim tab below the stick.
When used, the audible tone indicates the direction of movement and the mid position.
Alternatively when not racing the rudder mid-point can be set using Ch 1
Subtrim
and the
UP/DOWN
buttons.
Rate
In its factory setting, rudder movements are proportional or, if you like, linear. A 50% movement of
the stick to the right will result in a 50% movement of the rudder to the right, within the preset
range.
There are two ways of controlling the relationship between stick movement and rudder movement.
The first is
Rate, t
he other is
Expo
. They can be used alone or together. When
Rate
is used,
for a given stick movement, the rudder will move through a smaller angular displacement than if
there was no
Rate
used - but the relationship remains linear.
Strictly speaking it is not a “rate” which implies it is time dependant. Rather,
Rate
changes the
extent of rudder movement. The default is 100. If set to 50 then a movement of 50% of the stick
range will result in (0.5X50=) 25% of rudder movement. In effect, it desensitises stick movement in
a linear way, but over the entire stick range. The other important consequence of the use of
Rate
is
that it effectively reduces the rudder throw. If the rudder end points were set at 35 degrees say then
the use of a 70%
Rate
would effectively reduce the throw to (0.7x35=) 25 degrees. So use this
setting with care.
How to set-up
Rate
is explained below.
Expo (exponential) Control
Expo
is the other way of controlling the relationship between stick and rudder.
Rate
and
Expo
can both be used to control rudder movement, either singularly or combined together. A second set
of
Rate/Expo
settings can be use using Switch A (
SWA
)to invoke the
Sports
mode. More later.
With the use of
Expo
, the stick/rudder relationship changes to one that follows one of a
theoretically infinite number of exponential curves. For example with
Expo
, a 50% stick
