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21
Optional SAFE+ GPS Upgrade
RTF/BNF Basic
Compass Calibration
Compass calibration is required after installing the GPS
module, before fl ight. The aircraft will automatically enter
compass calibration on the fi rst power up after the GPS
module is installed, after binding.
IMPORTANT:
The aircraft must be outside and needs
to acquire a GPS lock in order to begin compass cali-
bration. The aircraft will not enter compass calibration
mode until the GPS lock is established.
Perform the compass calibration before the fi rst fl ight
or to correct the heading during auto landing if it var-
ies signifi cantly from the heading set during takeoff.
1. Remove the propeller if it is installed or activate
throttle cut.
2. With the transmitter trims centered, and in high
rates, power on the transmitter while holding the
transmitter sticks as shown.
3. Power on the receiver and set the model on
the ground. The aircraft will indicate the GPS is
searching for satellites by cycling the elevator up
and down.
4. After satellites are acquired, the aircraft will
signal it has entered compass calibration mode:
The elevons will cycle left and right slowly, and
the red and green LEDs on the fl ight
controller will fl ash alternately.
Once in calibration mode, the throttle is not active
and the transmitter sticks can be released. The
transmitter must remain powered on.
5. In calibration mode, fl ip the aircraft twice nose
over tail as shown in the step 5 diagram.
6. Turn the aircraft 90 degrees and roll the aircraft
twice, as shown in the step 6 diagram.
7. Turn off the transmitter.
8. Wait 3 seconds and disconnect the fl ight battery.
CAUTION:
Keep aircraft away from magnetic
sources such as cameras, camera mounts,
speakers ect. These may interfere with the GPS
system and loss of control may result.
2 Full Rotations
Compass Calibration ON
Compass Error
If at any time you experience no throttle
response after power up and the ailerons are
defl ected full right, the aircraft is indicating a
compass error. Disconnect the fl ight battery
and perform the compass
calibration procedure.
1
2
4
5
6
8
2 Full Rotations