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SPEKTRUM DX18t • TRANSMITTER INSTRUCTION MANUAL
EN
HElI (HElICOPTER)
Heli Model Type
NOTICE:
Refer to your helicopter, gyro and governor manuals
for programming recommendations.
CAUTION:
Always do a Control Test of your model
with the transmitter after programming changes to make
sure your model responds as desired.
Pitch Curve
Swashplate
Swash Type
Swashplate Type
The Swash Type menu option assigns the swash type for your par-
ticular helicopter model. Select the Swash Type before completing
any programming in the Function List. The Swash Type will affect
menu options in the Function List.
Collective Type
The collective type is used to turn on “Pull” collective for reversed
collective. Available settings are Normal and Reverse. Press NEXT
from the Swashplate Type screen to access the Collective Type
screen. The Collective Type allows the throttle/pitch stick to operate
in reverse and ensures trims, curves and all other functions that
are to work in reverse function properly.
Image Selection
Press the NEXT screen from the Collective Type screen to access
the Helicopter Image screen and to select an optional helicopter
image to use for the model selected.
The Swashplate menu
option enables you to
adjust the following:
• Swashplate Mix
• Exponential
• E-Ring
• Elevator Compensation
Use positive or negative Swashplate mix values as needed
for correct direction response of the helicopter.
Before making adjustments to the Swashplate mix, make sure the
throttle/collective pitch input moves the entire swashplate up or
down. If the servos are not moving in the same direction, reverse
them as necessary in the Servo Setup menu option.
When the entire swashplate moves up or down
1. Adjust the mix value for the Aileron and Elevator channels.
If the servos do not move in the correct direction, change
the direction of the mix—for example, a positive value
instead of a negative value.
2. Adjust the mix value for the Pitch. If the swashplate does
not move in the correct direction, change the direction
of the value (negative instead of positive).
Always enable Expo when using a standard rotating-arm servo.
The Expo delivers linear movement of the swashplate from
a standard rotary servo. When Expo is inhibited, the arm on a
rotary servo moves on a curved path with decreased swashplate
movement at the extremes of the servo arm travel.
NOTICE:
Do not enable Expo when using a linear servo.
Electronic E-Ring
This feature prevents overdriving servos by limiting servo travel
if the sum of your cyclic and pitch inputs exceed servo limits.
This function supports
adjustment of collec-
tive pitch in 5 flight
modes.
To adjust the Pitch Curve
1. Select the Pitch Curve you wish to edit (N, 1 or 2).
2. Scroll right to select the points on the curve and edit the
respective values.
3. Press the BACK button to save the Pitch Curves and return
to the Function List.
