Centre Of Gravity - ROBBE Arcus E 2.2 ARF Notice De Montage

2.1 Centre of Gravity:

Fix the battery in the fuselage in the appropriate position
(Fig.12). Do not connect the battery at this stage.
Install the wings and the tailplane.
12
Fix the battery in the correct position using hook-and-loop
tape.
Centre of Gravity 45 mm with the power unit retracted.
Centre of Gravity 40 mm with the power unit extended.
13
Aileron
15 mm
10 mm
Elevator
6 mm
6 mm
Rudder
20 mm
20 mm
CG 45 mm
Fig. 13
Control surface travels
Test-flying
Ensure that all the control surfaces are at neutral (centre),
and check their direction of travel (sense).
The Centre of Gravity should not deviate from the stated
point by more than 5 mm.
Wait for a day with little wind for the initial test-flights. The
CG 40 mm
wind speed should not exceed 10 km/hr.
The Arcus E 2.2 is equipped with airbrakes which are used
to reduce the model's speed.
Check the effect of the airbrakes at a safe height with the mo-
tor switched off before using them on the landing approach.
Building and Operating Instructions - Arcus E 2.2 ARF
Checking the working systems, setting up the control
surfaces
- Charge the flight battery.
- Switch the transmitter on, and move the throttle stick to the
"motor off" end-point.
- Give the flight battery a full charge, apply Velcro (hook-
and-loop) tape to the pack, place it in the fuselage, and
connect it. Wait for the speed controller to emit a series of
beeps.
- Place the canopy on the model.
- Check the channel assignment of the control surfaces, and
swap over the connectors at the receiver if necessary.
- Check the neutral position of the control surfaces. If neces-
sary, loosen the clamping screws in the pushrod connec-
tors, set the control surfaces to centre, then re-tighten the
screws.
- Check the direction of rotation of the servos.
- When you move the aileron stick to the right (a), the right-
hand aileron (a) should rise, the left-hand aileron (b) fall.
- Pull the elevator stick back towards you (c), and the rear
edge of both elevators should rise (c).
- If any of the control surface functions works the wrong way
round, correct it using your transmitter's servo reverse
facility for that channel.
- Check that all the linkages are firmly fixed, but free-mo-
ving.
- Check in particular that the clamping screws in the swivel
pushrod connectors are properly tight.
- The travels are measured at the inboard end of the control
surfaces.
- The stated control travels are just a guide for the first few
flights. The final settings should be selected to suit the
individual pilot's flying style.
- The Expo settings should also be adjusted to suit the pilot's
preference.
No. 2568
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