A-4 Skyhawk Blue Angel
No. 2531
No. 2540
Fig. 7
- Glue the two parts of the plastic hatch cover to the fuselage
using UHU-por adhesive; apply the glue to the inner flange of the
hatch cover only.
Fig. 8
- Slide the tailplane into the slot in the fin.
Fig. 9
- Set the tailplane exactly at right-angles to the fin, and glue the
two parts together permanently.
Fig. 10
- Screw the horn to the elevator as shown.
Figs. 11 and 12
- Glue the tail assembly to the fuselage, aligning it with the wing by
sighting along the fuselage from the tail end.
Figs. 13 and 14
- Glue the nose-cone to the fuselage.
Fig. 15
- Screw the horns to the underside of both ailerons.
Fig. 16
- Set the aileron servos to centre from the transmitter.
Fig. 17
- Connect the aileron pushrods to the servos.
- Set the ailerons to neutral (centre), adjust the pushrod lengths
carefully, and connect the clevises to the aileron horns.
Fig. 18
- Adjust and connect the elevator pushrod, as described for the
ailerons.
Fig. 19
- Installing the receiver: connect the servos and the speed con-
troller to the receiver, referring to the RC system instructions for
the correct channel assignment and connector pin configuration.
(the orange signal wire corresponds to the white wire used for
robbe-Futaba systems).
- Place the receiver in the fuselage and deploy the receiver aeri-
al(s).
Fig. 20
- Stick a strip of Velcro tape to the underside of the battery.
- Stick the mating piece of Velcro tape in the fuselage.
Fig. 21
- Place the battery in the fuselage, but do not connect it at this
stage.
Figs. 22 and 23
- Place the cabin on the fuselage.
- The canopy is held in place by a locating tongue and a magnet-
ic latch.
Fig. 24
- Charge the flight battery.
- Switch the transmitter on, and move the throttle stick to the
“motor stopped” end-point.
- Place the fully charged flight pack in the fuselage and connect it
to the speed controller. Wait until you hear the controller emit a
series of beeps.
Sender = Transmitter
Ein = ON
Motor aus = Motor “stopped”
Fig. 25
Checking the power system
- Hold the model securely.
- Check that there are no loose objects, such as rags, tools or sim-
ilar, in front of the model, as they could be sucked into the fan
unit.
- Move the throttle stick forward. The motor will now run, and you
should be able to feel a distinct flow of air coming from the tail
end of the fuselage.
- Move the throttle stick back to the “motor stopped” position.
- First disconnect the battery from the speed controller, then
switch the transmitter off.
Motor ein = Motor “on”
Figs. 26 and 27
- Check the channel assignment of the control surfaces, and swap
over the connectors at the receiver if necessary.
- Check the neutral position of all the control surfaces. If any sur-
face is not exactly at centre, screw the appropriate clevis in or
out to correct.
- Stand behind the model.
- 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
the elevator should rise (c).
- If either control surface function works the wrong way round,
correct it using your transmitter’s servo reverse facility for that
function.
- Check that all the linkages are firmly fixed, but free-moving.
Querruder = Aileron
rechts = right
Höhenruder = Elevator
ca. 6 mm = approx. 6 mm
Fig. 28
- Overall view: protectors as landing skids
Fig. 29
- Glue the front protector centrally to the underside of the fuse-
lage.
Figs. 30 and 31
- Glue the protectors over the aileron pushrods. Ensure that the
pushrods do not foul the protectors when the servos are moved
to either end-point.
Fig. 32
- Place the battery in the model for balancing; do not connect it at
this stage.
- Mark the Centre of Gravity on both sides of the fuselage, as
shown in the view of the underside.
- Support the model at the marked points, and allow it to hang
freely. The CG is correct when the model balances level, with the
nose inclined slightly down.
- Adjust the position of the flight battery if necessary.
- Mark the battery location in the fuselage, so that you can be con-
fident of replacing it in the same position after removing it.
- With the battery in the correct position, pack pieces of scrap
foam round it, so that it cannot shift in flight and alter the model’s
balance.
- The model is now ready for flying -
once you have recharged
the flight battery.
Figs. 33 and 34, access to the fan unit and speed controller
- The ducted fan unit is accessible from underneath for mainte-
nance or repair work.
This is the method of opening the fuselage:
- Undo the screws holding the fuselage hatch in place.
- Remove the fuselage hatch.
- Disconnect the electrical plugs and sockets, and the speed con-
troller or fan unit can be removed from the fuselage. Write down
the colours of the mating wires.
- Reverse the procedure to re-install the parts.
Assembly and operating instructions
3
©
robbe Modellsport
