Battery Installation And Esc Arming; Battery Selection; Center Of Gravity - Horizon Hobby E-Flite Viper 90mm EDF Manuel D'utilisation

Battery Installation and ESC Arming

Battery Selection

A 6S 4000–7000mAh LiPo battery is required. The Spektrum 5000mAh 22.2V 6S
30C LiPo battery (SPMX50006S30) 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
within the recommended CG range before flying.
1. Lower the throttle and throttle trim to the lowest settings. Power on the trans-
mitter, 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 in the center of the battery compartment as
shown. 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 and loose items away from the fan intake.
When armed, the motor will turn the rotor 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 6 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
Continuous slow single tones Abnormal throttle signal
Continuous rapid single tones Throttle signal not at low position
Continuous double tones Battery voltage is beyond acceptable range

Center of Gravity

WARNING: Install the battery but do not connect it to the ESC while
checking the CG. Personal injury may result.
The CG location is 10mm (±7mm) from the back edge of the front plastic wing
mounting structure. Always check the CG location with model inverted, and the
landing gear down.
The CG location is adjusted by moving the battery pack forward or backward in the
battery compartment.
Tone Meaning
Transmitter and receiver not bound
Throttle lead damaged or not plugged into receiver
Throttle lead plugged into receiver backward
Throttle stick not at low position
Throttle travel reduced below 100%
Throttle reversed
Throttle trim raised
Verify battery is a 22.2V 6-cell LiPo
Verify battery is fully charged
Reference Reference
Possible problem
10mm (±7mm)
EN
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