Battery Requirements; Battery Capacity - Spektrum AR7110 User Manual

EN

Battery Requirements

IMPORTANT: DO NOT use a 4-cell 4.8-volt battery to power the AR7110/
AR7110R.
Because of the built-in regulator the AR7110/AR7110R has a minimum recommen-
ded operational battery voltage of 5.5 volts and is designed to use 6-volt 5-cell
NiMH, 7.2-volts 6-cell NiMH or 7.4-volt 2-cell LiPo batteries. (Higher voltage
should be used only if the servos are compatible.) While the AR7110 will continue
to operate down to 3.5 volts, the AR7110/ AR7110R features a built-in 5.2-volt
regulator for the Rudder, Aux 2, Gear 2, Throttle 2 channels output. A 4-cell
4.8-volt battery will not provide sufficient headroom (voltage margin) to maintain a
5.2 regulated voltage. Regulated outputs are provided to allow the gyro, gyro gain
and throttle to be operated at the necessary lower voltage while the cyclic servos
(aileron, elevator and pitch) are powered directly by the pack voltage (typically
5-cell 6-volt NiMH or if high voltage compatible servos are used 2-cell 7.4-volt
LiPo batteries).

Battery Capacity

It is important to select a battery that has more than adequate capacity to provide
the necessary flight time. Our staff has been recording in-flight data to determine
typical current consumption of aircraft in flight. The following graph illustrates a
T-REX Nitro 600 during aggressive 3D flight.
Milliamps used per 8 minute flight
Helicopter T-REX 600N
Servos
Batteries
Engine YS50
Flight envelope Aggressive 3D
Average current 1.15 amps
Peak current 3.33 amps
8
3-JR8717' s , 1-8900G (rudder),
1-8317 (throttle)
1- 2100mAh 2-cell 7.4-volt LiPo
173mAh