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This menu is for setting control functions for use with helicopters. All functions in this menu are the same
as described in the MODEL SETUP MENU – AIRPLANES section, except that a swashplate type selection
function is included for helicopters. Press
ENTER
for 2 seconds to access this menu from the home screen.
All channels for helicopters are assigned as shown in the chart on page 6.
SWASHPLATE TYPE
Enter this screen to select the type of swash plate in the helicopter. Setting this properly allows for proper
mixing of all controls for the main rotor. Four options are available, with some offering cyclic and collective
pitch mixes (CCPM) for optimum simplicity and performance. It may be necessary to reverse the direction
of a control when using a CCPM mix to achieve the proper functionality.
1 Servo (90º):
Tilting of the swash plate is accomplished with one servo for control of the elevator axis
and one servo for the aileron axis. Another servo directly controls collective pitch. Selecting this swash
type means that no swash plate mixers are required or used. This is typically used for fl ybarless systems.
2 Servos (180º):
For CCPM with two servos (aileron and elevator) connected to the swash plate
180 degrees apart. Control of the pitch-axis happens as a result of a mechanical de-coupling rocker.
Through this pre-set mix, throttle (pitch) stick movement causes both servos to move the plate up and
down. Aileron stick movement causes both servos to tilt the plate side-to-side.
3 Servos (120º):
For CCPM with three servos connected to the symmetrical swash plate at 120º
angles from each other. One pitch servo, one elevation servo, and one aileron servo are connected
to the swash plate.
3 Servos (135º):
For CCPM with three servos connected to the swash plate. The connections are
similar to the 3 Servos (120º) setting but with slightly different geometry (two servos are connected at
135º angles forward from the rear of the swash plate).
Functions for helicopters are available to support models with various fi xed mixes, programmable mix
options, swash types. Press
ENTER
briefl y to access this menu.
Setting of the SERVO SET, DUAL-RATES, EXPONENTIAL, THROTTLE CUT, ADVANCED GYRO GAIN,
RUDDER MIXER, PROGRAMMABLE MIXER, RF OUTPUT, TIMER, FLIGHT CONDITION, and DIGITAL
SWITCH ASSIGNMENTS functions is the same as described for airplanes in the previous sections. However,
if using a helicopter which has CCPM mixing, read the SWASH TYPE section on the previous page before
adjusting the reversing and travel limits settings.
THROTTLE CURVE
The throttle’s output is normally linear in relation to movement of the throttle stick. A non-linear relation
between the movement of the throttle stick and the throttle in the model can allow for optimum control of
power to the model (which is also linked to the control of the pitch of the main rotor blades). These non-
linear control curves can be customized for the particular model.
The idle-up function is used to optimize the throttle position for all fl ight envelopes including aerobatic fl ight.
By default the TTX850 assigns switch E as the idle-up control switch. This switch incorporates one “normal”
and two “up” functions within the three positions of the switch.
MODEL SETUP MENU – HELICOPTERS
SETTINGS MENU – HELICOPTERS
