ROBBE Arcus E 2.2 ARF Manual De Construcción Y De Uso página 4

Checking the working systems:
1. Motor and retractable power unit:
The model is fitted with a retractable power unit. The power
unit extends from the fuselage for the powered phase of
flight, allowing the model to climb to height.
The motor and the retractable power unit are controlled by
the mixer fitted to the model.
The mixer module is connected between the speed control-
ler, the retractable power unit servo and the receiver.
1.2 Checking the retractable power unit:
Move the throttle stick to the Idle end-point, then switch the
transmitter on.
Locate the switch (channel 7) for the folding motor auxiliary
function, and set it to NORMAL.
Connect the flight battery: the LED on the mixer starts to light
up, and the power unit extends.
The speed controller emits a beep to indicate that it is swit-
ching to operating mode.
The LED on the mixer flashes if the throttle function is not at
the Idle end-point, or if the trim is not at 24%.
4
Building and Operating Instructions - Arcus E 2.2 ARF
Speed controller socket at receiver output, channel 3
11
Auxiliary channel socket (channel 7) Auto / Normal
This connector does not need to be plugged in.
Fig. 11 – 1.1 Retractable power unit mixer module:
Typical settings, using a Futaba RC system as an example:
- Complete the basic settings - such as mode, switch as-
signment etc. - as described in the instructions supplied
with your RC system.
- Set channel 3 to servo reverse.
- Set the throttle stick to Motor Off, and the trim to +24%.
1.3 Normal mode operation:
The motor starts running when the throttle stick is advanced.
The retractable power unit remains extended.
1.4 Auto mode operation:
Move the throttle stick to the Idle end-point, then move the
auxiliary function switch to the Auto position.
If you now slowly move the throttle stick to the "advance
throttle" position, the power unit extends and the motor starts
running. Moving the throttle stick back to the Idle position
causes the motor to switch off, and the propeller is braked
by the stopper. Note: on the ground, without any airflow over
the propeller, you may find that the propeller does not stop in
the correct position. In this case set the propeller
to the vertical position with a screwdriver. The power unit
retracts after a delay of three seconds.
If the motor fails to extend to the correct position, adjust the
trim pots on the mixer module.
End-point adjuster pot for retracted power unit
End-point adjuster pot for extended power unit
- Reverse the direction of rotation of the auxiliary channel for
the retractable undercarriage.
- Connect the speed controller, the retractable power unit
servo and the receiver to the mixer; the diagram shows the
appropriate sockets.
- Install the mixer module in the fuselage again.
2. Retractable undercarriage and airbrakes:
The undercarriage is operated using channel 5. Check the
end-points of the retract servo, and adjust the servo travel
if necessary.
The airbrakes are controlled by channel 6. Once again, ad-
just the end-points if necessary.
No. 2568
Socket for retractable power unit servo
Speed controller socket