Spektrum AR7200BX - Power System Requirements; Recommended Power System Test Guidelines

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AR7200BX Power System Requirements
All flybarless gyro systems require uninterrupted power.
During even a short duration power interruption/brownout, the flybarless unit
must reboot and reinitialize.
CAUTION: If a power interruption/brownout occurs during flight, a crash
willoccur.ItisyourresponsibilitytoensuretheAR7200BXhassufcient
power without interruption.
Some of the power system components that affect the ability to properly deliver
adequate power include:
•Theswitchharness,batteryleads,servoleads,regulatorsetc.
•Receiverbatterypack(numberofcells,capacity,celltype,stateofcharge)
•TheESC’sBECcapabilitytodelivercurrenttothereceiverwhenloadis
placed on the servos. This is the #1 cause of power interruptions in electric
helicopters.
The AR7200BX has a minimum operational voltage of 3.5 volts; it is highly
recommended the power system be tested per the following guidelines.
Recommended Power System Test Guidelines
Performthefollowingtestwithavoltmeter.TheSpektrumFlightLogorTelemetry
Modules (TM1000/TM1100) work well for this test.
PlugtheFlightLogintoanopenchannelportinthereceiverand,withthe
system on, load the servos by applying pressure to the swashplate with your
hand for 3 minutes. Monitor the voltage at the receiver. It is important to load
the swashplate for 3 minutes. If a voltage regulator becomes hot, it can lose it’s
ability to supply current. An alternate method is to power on the system and
rapidly move the control sticks (stir the sticks) with no load on the servos for 3
minutes. The voltage should remain above 4.8 volts in both cases.