15SPEKTRUM NX20 • TRANSMITTER INSTRUCTION MANUAL
EN
Model Name enables you to assign a custom name to the current
model memory. Model names can include up to 20 characters,
including spaces.
Aircraft Type
This menu is only available in Airplane Mode. See ACRO (Airplane) section for set up.
Sailplane Type
This menu is only available in Sailplane Mode. See SAIL (Sailplane) section for set up.
Swash Type
This menu is only available in Helicopter Mode. See HELI (Helicopter) section for set up.
Aircraft Options
This menu is only available in Multirotor Mode. See MULTI (Multirotor) section for set up.
Model Name
Flight Mode Examples
Flight modes enable a pilot to organize transmitter functions into
groups so they are easier to manage, eliminating the need to flip
multiple switches for flying configuration changes. If a single 3
position switch doesn’t offer enough flight mode choices, you can
expand the flight mode configuration by using 2 or more switches,
enabling up to 10 flight modes, depending on the model type
chosen. A setup table helps you define what each switch position
does. Changing flight modes can also trigger voice callouts, giving
you confidence in what the switch change will do.
For example, if your airplane has flaps, retracts, and SAFE: On
a single switch you may configure one flight mode for takeoff
which adds a small amount of flaps with the gear down and
SAFE activated in one switch position, a second flight mode for
normal flight with flaps and gear up and SAFE off on a second
switch position, and a third flight mode for landing with flaps fully
deployed, retracts down and SAFE activated on a third switch
position. By putting all of these features on one flight mode switch,
you don’t have to work separate flaps, gear and SAFE switches
during the flight.
Helicopters take advantage of flight modes by using throttle
curves. Having a “normal” flight mode enables the model to start
from a stop (or idle) and bring the rotor head up to speed and
get the helicopter in the air with a low headspeed. Flight modes
are essential for helicopters to be able to fly inverted and do
aerobatics. “Idle up” or “stunt” modes enable the use of a throttle
curve which keeps the motor running at the same speed for all
throttle stick positions. While in this mode the throttle stick is used
to control collective pitch exclusively. Setups commonly include
multiple “idle up” flight modes, one for medium head speed, and
another for high head speed.
Sailplanes take advantage of flight modes in many ways by
changing the way the control surfaces respond to control inputs. In
a launch mode the throttle stick may move the flaps and ailerons
away from neutral with the stick all the way up, to a slight amount
of camber (flaps down) with the stick all the way down. In a cruise
mode all the flaps and ailerons travel together, up stick offers a
small amount of reflex (flaps move up), and down stick offers a
small amount of camber. There may be an aerobatic mode with
high rates and flaps mixed to operate with the ailerons. A crow
mode can provide maximum drag with the flaps and ailerons
moving in opposite directions. In this mode, when the stick is up
the control surfaces are neutral, and when the stick is down the
flaps and ailerons are deployed. Elevator trim compensation needs
change with these mode changes as well, so for each different
flight mode, different elevator compensation values are necessary.
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