Spektrum BEAST X AR7210BX Mode D'emploi page 36

EN
Rudder Servo
If the tail gyro is operated in Normal-Rate mode, the rudder servo must often be trimmed
precisely so that the tail rotor produces just enough thrust to counteract the rotor torque in
hovering flight. Otherwise the helicopter would constantly drift into one or another direction
on its vertical axis as the gyro only dampens sudden movements but does not control the tail
rotor's absolute position.
To trim the rudder servo proceed as follows: Switch the tail gyro to Normal-Rate mode and fly
the helicopter. By using the digital trim function of your transmitter, trim the rudder servo so
that the helicopter does not drift in hovering flight. Land the helicopter and immediately open
Parameter menu point A by briefly pressing the setup button once. To take the tail trim value
from the transmitter once again press the button and this time hold it for at least 2 seconds (if
you briefly press the button only, you would skip to Menu Point B). You can see the rudder
servo move to the new center position and the Status-LED will flash for some moment to
signalize the position has been set. Now reset the digital trim of your transmitter back to zero.
NOTICE: Only rudder trim values are accepted when the gyro is set to Normal-Rate
mode. When you land after the trim flight and open Parameter Menu Point A make sure
that you do not change the gyro mode and/or trimming of the transmitter by accident,
e.g. when using a flight mode switch in the transmitter.
If the tail gyro solely is operated in HeadingLock mode, trimming the rudder servo is not
required under normal circumstances. Here the gyro actively controls the rate of rotation
whereby drifting is excluded on the vertical axis. In unfavorable mechanical conditions
it may be helpful to fly the heli in Normal-Rate mode once and to trim the rudder servo
accordingly, so that the mechanical throw is balanced more equally.
The trimming of the rudder servo will be deleted when the tail rotor endpoints are
readjusted at Setup Menu Point E.
Press the setup button once to move to Parameter Menu Point B.
B Control Behavior
Menu Point B allows you to select between different control behaviors for your helicopter,
including the maximum rotation rate and exponential.
Factory setting is "Sport," which should be suitable for most pilots.
"Normal" has a decreased rotation rate for cyclic and tail controls, as well as increased
exponential. When you are comfortable flying in "Normal," find your personal preference by
increasing the Control Behavior one option at a time.
To use your own transmitter settings instead of the presets, select Status LED:
36
Blue Solid.