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2-in-1 Control Unit Description, Arming and Motor Control Test
Your Blade SR is equipped with a lightweight combination of main motor and tail motor electronic speed controls and main motor and tail
motor proportional mixer. The 2-in-1 has an 8-amp brushless ESC for the main motor that is specifi cally designed for use in helicopter
models. The ESC is not programmable for use in other applications.
• “Soft” Low Voltage Cutoff-
Occurs when the battery reaches approximately 9V under load. This helps prevent “deep” over-discharge of the Li-Po battery
during use.
• Soft (Slow) Start-
Intended to help prevent potential damage of the gear train, motor and ESC by slowly increasing power to the motor. The fi rst time
you power up the ESC it will take 15 seconds for the ESC/motor to reach the power level you initially set with the throttle stick/
curve. This means you will need to wait 15 seconds before attempting any aggressive maneuvering to allow the power system to
reach the set level of power.
Any time the ESC/motor have been powered down completely (to 0% power) for 15 seconds or more, the soft start will occur again.
If you land the helicopter to make an adjustment as you will not need to rearm the ESC in order to perform a soft startup. Simply wait
15 seconds before powering up the ESC/motor again for fl ight.
• Fast Start-
Allows any level of power to be applied almost immediately after ESC/motor have been powered down completely (to 0% power)
for any amount of time less than 15 seconds. This is particularly helpful if you accidentally bump the Throttle Hold switch or when
aborting an auto-rotation attempt as it will allow the ESC/motor to reach any power level you have set with the throttle stick almost
immediately when the Throttle Hold switch is set back to the OFF (0) position.
Arming the 2-in-1 Unit
The following contains the steps you must follow to ensure proper arming and operation of the 2-in-1 unit, as well as
proper motor response.
WARNING:
Before each fl ight ALWAYS turn the transmitter on before connecting the fl ight battery to the 2-in-1 unit. Never connect
the fl ight battery to the 2-in-1 unit before powering the transmitter on fi rst. After each fl ight, always disconnect the fl ight battery from the
2-in-1 unit before powering the transmitter off.
Note:
The antennas exiting the Spektrum AR6100e receiver should extend outward (to the left and right of the helicopter) as much
as possible for the best overall performance. Be sure to double-check the position and orientation of both antennas before
each fl ying session, especially if the helicopter was taken out of a box or carrying case.
1. Both the throttle stick and throttle trim MUST be in their lowest possible position in order for the 2-in-1 unit to arm. The fl ight mode
(F MODE) switch must be in the normal (0) fl ight mode position with the switch toggled toward the back of the transmitter for the
unit to arm.
If this is the fi rst test fl ight, or a test fl ight following repairs, you will also want to center the rudder, aileron and elevator trims
2. Turn the transmitter on and ensure it has adequate battery power. Connect the fl ight battery to the 2-in-1 unit.
Note:
Do not move or sway the helicopter until the red LED on the gyro illuminates solidly.
3. You will hear two “beeps” from the 2-in-1, indicating it has armed properly. The fi nal step of the initialization is for the red LED on the
gyro to illuminate solidly.
4. When you have heard two “beeps”, the unit is armed and ready for fl ight.
CAUTION: both the main and tail rotors will now spin with throttle stick input.
For safety, once the unit is armed, the main and tail motors will not spin with the throttle stick and trim in their lowest positions. We
also suggest setting the throttle hold (TH HOLD) switch in the on (1) position, toward the front of the transmitter, once the 2-in-1 unit
has armed. This will keep the motors and rotor blades from spinning while you handle the helicopter and transmitter.
5. If you have not set the throttle hold switch to the on position, or after you set the switch to the off (0) position toward the back of the
transmitter, DO NOT advance the throttle stick until you are clear of the rotor blades and ready to fl y.
Note:
If you do not hear two beeps or if you hear a constant series of beeps after battery power is applied, the
2-in-1 unit has not armed properly. A constant series of beeps indicates the throttle is set too high for initialization.
6. Confi rm that the throttle stick is in the lowest possible position and that the throttle trim is set in approximately the middle position.
7. Once you have placed the helicopter in a safe area, free of obstructions, and are clear of the rotor blades, you can safely begin to
power up the model to check for proper operation of the motors.
