Before flight, Control direction test, Control centering – E-flite UMX Sbach 342 BNF User Manual
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Lower throttle and throttle
trim to lowest settings.
Connect fl ight battery
and attach to hook
and loop strip.
Continuous LED
Power on
Transmitter
Wait 5
Seconds
Before Flight
CAUTION: Always keep hands away from the propeller. When armed, the motor will turn the propeller
in response to any throttle movement.
When the aircraft does not respond, binding may be required.
If throttle is fully raised when battery is connected, a musical tone will sound after 5 seconds. Disconnect
the battery immediately.
NOTICE: Fully lower transmitter throttle before connecting the fl ight battery. Failure to do so may alter
AR6400NBL settings.
For more information about the AR6400NBL, visit www.SpektrumRC.com.
You should bind your aircraft and transmitter before doing these tests. Move the controls on the transmitter
to make sure aircraft control surfaces move correctly and in the proper direction.
Note: Make sure tail linkages move freely and that paint or decals are not adhered to them.
Control Direction Test
Series of tones
Control Centering
Before fi rst fl ights, or in the event of an accident,
make sure the fl ight control surfaces are centered.
Adjust linkages mechanically if control surfaces are
not centered.
Use of the transmitter sub-trims may not correctly
center the aircraft control surfaces due to the
mechanical limits of linear servos.
1. Make sure control surfaces are neutral when
the transmitter controls and trims are centered.
Where possible, transmitter sub-trim must be
set to zero.
2. When needed, use a pair of pliers to carefully
bend the metal of the linkage (see illustration).
3. Make the U-shape narrower to make the
connector shorter. Make the U-shape wider
to make the linkage longer.