Ethos v1.5.7 and X18, X20 series User Manual
In this situation the flaps will be half down at servo neutral, which means an offset mix
will be needed to bring the flaps up to their neutral position for normal flight (see step 4
below).
We have set the Flap weights to -180% for maximum travel. The actual travel may be
configured in the Outputs. (To avoid overdriving servos the initial min/max limits should
be set to something like +/- 30% in the Outputs, and then increased during final setup
while being careful not to overdrive the servos. Please note that for the sake of clarity
this has not been done for this example, they are set to -180%.). The example above
shows the flaps in the fully down position.
Step 6. Add a 'Flaps Neutral' offset mix
If you have offset your flap servo horns to achieve sufficient downward travel, the flaps
will probably be deflected downwards about 20-30% at servo neutral. We need to add an
offset using an Offset Mix to bring the flaps up to the wing neutral position for normal
flight.
Add an Offset Mix. We will start with an offset of 80%, which will need to be tweaked to
achieve a ‘flaps neutral’ situation.
Move the throttle stick fully up to ensure that the Butterfly mix is off and not contributing
to the flap channels.
Set the 'Channels count' to 2, and the Outputs to your flaps channels. In this example
the flaps are on channels 6 and 7, and the mixer values are at 80% as per our Offset we
have just set. (Note that the Orange bars showing the Outputs are higher than the Mixer
values because the Min/Max limits for the Flaps have been set to +/- 150% in Outputs.)
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