EN
8
Air Tractor 1.5m
Center of Gravity
Battery Installation and ESC Arming
Battery Selection
A 3S or 4S 2200–3200mAh LiPo battery is required. The Spektrum 3200mAh
14.8V 4S 50C LiPo battery (SPMX32004S50) is recommended. Refer to
the Optional Parts List for other recommended batteries. If using a battery
other than those listed, the battery should be within the range of capacity,
dimensions and weight of the Spektrum Li-Po battery packs to fit in the
fuselage. Be sure the model balances at the recommended CG before flying.
1. Lower the throttle and throttle trim to the lowest settings. Power on the
transmitter, then wait 5 seconds.
2. Remove the battery hatch.
3. For added security, apply the loop side (soft side) of the optional hook and
loop tape to the bottom of your battery, and the hook side to the battery tray.
4. Install the fully charged battery to the front of the battery compartment as
shown below under Center of Gravity. Secure using the hook and loop straps.
5. Connect the battery to the ESC. If you have not completed the bind
sequence, do so at this time as outlined in this manual.
CAUTION:
Always keep hands away from the propeller. When armed,
the motor will turn the prop in response to any throttle movement.
6. Keep the aircraft immobile and away from wind or the system will not initialize.
• The motor will emit a series of rising tones when the battery is connected,
and then 3 or 4 even tones indicating the number of cells connected.
• An LED will light on the receiver when it is initialized.
7. Reinstall the battery hatch.
ESC Tones:
If the ESC sounds a continuous double beep after the flight battery
is connected, recharge or replace the battery.
ESC Error Tones Tone Meaning
Possible problem
Continuous
slow single
tones
Abnormal throttle
signal
Transmitter and receiver not bound
Throttle lead damaged or not plugged
into receiver
Throttle lead plugged into receiver
backward
ESC Error Tones Tone Meaning
Possible problem
Continuous
rapid single
tones
Throttle signal not at
low position
Throttle stick not at low position
Throttle travel reduced below 100%
Throttle reversed
Throttle trim raised
Continuous
double tones
Battery voltage is beyond
acceptable range
Verify battery is a 3 or 4-cell LiPo
Verify battery is fully charged
The Center of Gravity (CG) location is 65mm +/- 5mm back from the leading
edge of the wing. Install the recommended battery to the front of the battery
compartment for the correct CG, as shown below.
From the front of the wing
65mm +/- 5mm
CAUTION:
Install the battery but do not connect it to the ESC while
checking the CG. Personal injury may result.
