Differential (Air And Sail Types Only); V-Tail Differential (Air And Sail Types Only); Throttle Cut - Spektrum DX18 Manuel D'utilisation

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D/R & Exponential
Dual Rates and exponentials are available on the aileron, eleva-
tor and rudder channels. This adjusts control rates for servos.
Adjust the throws (Dual Rate) and center sensitivity (Expo) of the
control's range independently. Designate a switch for moving
between control rates for a servo channel. Move the designated
switch to change the position (0,1 or 2-depending on switch or
flight modes chosen) for Dual Rate and Expo values.
CAUTION:
Always test the model after making adjust-
ments to make sure the model responds to controls as
desired.
Dual rate is a percentage of the Travel Adjust. Decreasing the
dual rate decreases the amount of control surface throw for that
particular rate.

Differential (Air and Sail Types only)

The Differential function decreases the amount an aileron moves
down without affecting the amount the other aileron moves up.
This can decrease adverse yaw (right or left movement of the
aircraft nose) tendencies during roll maneuvers. Positive (+) and
negative (-) differential is available; however, normally more up
(+) aileron travel is required than down (-).
Assign a switch to enable differential values during flight or
select "On" so that differential is always enabled.

V-Tail Differential (Air and Sail Types only)

The V-Tail Differential function decreases the amount one V-Tail
surface with rudder stick movement moves down without affect-
ing the amount the other V-Tail surface moves up. V-Tail Differ-
ential is used to correct pitch up or down problems with rudder
input on a V-Tail aircraft. Either positive or negative differential
can be used to compensate for the pitching issue to make level
turns with rudder input.

Throttle Cut

The Throttle Cut function is for powering down an engine or motor
using a designated switch. Throttle Cut has higher authority than
any other flight mode.
When you activate Throttle Cut, the throttle channel is driven to its
programmed value (normally off).
Activate the programmed switch to test Throttle Cut. Watch the
Throttle Cut monitor and make sure the throttle moves to the
desired position. The value of 0% is low throttle with mid trim. You
may need to use negative values.
Make sure the throttle goes to the desired position as shown in the
servo monitor on the left side of the screen.
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Exponential affects control response sensitivity around center but
has no affect on overall travel. Positive and negative exponential
values are available. A positive expo value decreases the sen-
sitivity around the center. Negative exponential values increase
sensitivity around neutral and are seldom used.
Differential programming is only available if wing control
surfaces (aileron, flaperon or elevon) are connected to separate
servos on separate channels. See the Aircraft Type Screen to see
available wing setup choices.
CAUTION:
Always test the model after making adjustments
to make sure the model responds to controls as desired.
SPEKTRUM DX18 • TRANSMITTER INSTRUCTION MANUAL