Multiplex EXTRA 330 SC INDOOR EDITION Notice De Construction page 11

A warm welcome to your new Multiplex Extra 330SC Indoor
Edition.
You will require the following tools to build the model:
Elapor # 85 2727
1 x Zacki ®
Elapor super liquid # 85 2728
®
1 x Zacki
Activator spray for CA adhesive
UHU ® POR
Small cross-point screwdriver
Balsa knife
Pointed-nose pliers
1 sheet 320-grit abrasive paper
Before starting construction:
Check that all parts are present by comparing the kit con-
tents with the Parts List on page 13.
To ensure that the airframe is free of warps we recommend
building the model on a perfectly flat surface, cleaned
carefully to avoid denting or scoring the components. It is
essential to cover the surface with clear plastic film to pre-
vent the parts becoming stuck to it. Unless expressly stated
otherwise, please use Zacki
adhesive for all joints on the model.
1. Preparing and assembling the model's horizontal
components:
Prepare the flat building surface by cleaning it carefully,
then cover it with clear plastic film. Lay the tailplane on the
building board, top side up, and insert the 0.5 x 3 x 100 mm
CFRP rectangular strips (26) in the slots. Run low-viscosity
(thin) Zacki Elapor super liquid along the strips, then apply
a little activator spray to cure the glued joints.
Fig. 1
The wings and tailplane should be glued to the fuselage
centre section using UHU
applying the adhesive sparingly to the joint surfaces, leaving
them to air-dry for about eight minutes, then pressing the
parts together. Glue the CFRP rods in the wings and the
fuselage centre section as described for the tailplane. The
0.8 mm Ø x 330 mm and 0.8 Ø x 370 mm rods (16 & 17)
overlap in the centre of each panel
Fig. 2
2. Preparing the lower fuselage section, gluing it to the
centre section:
Glue the 0.8 Ø x 530 mm CFRP rod (20) in the lower fu-
selage section. Glue the undercarriage support plates (43)
and the L.H. and R.H. strut brackets in the positions shown.
Take care not to apply too much adhesive: remember that
CFRP rods have to pass through the holes later. Glue the
tailskid in place using UHU
Fig. 3
®
Apply UHU POR to the joint surfaces of the lower fuselage
section and the centre section, and glue them together as
described above. Check carefully that the parts are aligned
correctly and exactly at right-angles to each other.
Fig. 4
3. Stiffening the fuselage and wings:
Cut the 0.8 Ø x 500 mm CFRP rods (19) to the required
-Elapor CA (cyano-acrylate)
®
® POR. This is accomplished by
® POR.
lengths, and glue them to the fuselage as shown to stiffen
the structure. The undercarriage legs can also be glued to
the fuselage at this stage; they consist of the 1.5 x 2.5 x
230 mm rectangular strips (30) and the 1.2 Ø x 250 mm
wing struts (22). Standard Zacki Elapor should be used for
these joints.
Fig. 5
4. Installing the aileron servo and linkages:
Set the aileron servo (Hitec HS-65HB # 11 2065) to neutral
(centre) using a servo tester or your radio control system,
then fit the double-ended output lever (supplied with the
servo) on the servo shaft. Locate the servo output lever
(37) supplied in the kit, and screw it to the lever attached
to the servo. Drill 1 mm Ø holes in the aileron servo output
lever at the points where the pushrods will subsequently be
connected. This part should face forward. Fix the servo in
the appropriate recess by applying a small drop of Zacki to
each servo mounting lug.
Fig. 6
Glue the L.H. and R.H. aileron horns (33 & 34) in the slots
in the ailerons. The pushrods are assembled as shown in
the drawing: one end of the pushrod is completed by gluing
it into an M2 x 20 mm threaded coupler (48), and screwing
a clevis (46) on the coupler; grip the threaded coupler in a
pair of pliers while you do this. Use a small pair of pliers to
press the linkage pins (47) through the clevises to connect
them to the aileron horns, then slip the pushrods into the
clevises. Measure the correct pushrod length to the servo,
then glue the clevises to the pushrods. The final pushrod
length can now be adjusted by screwing the clevises in or
out on the threaded couplers. Ensure that both ailerons are
exactly horizontal when the servo is at neutral (centre). The
pushrods can now be connected to the servo output lever
by engaging the linkage pins.
Fig. 7
5. Fitting the undercarriage fairings and wheels:
Sand the bottom end of the undercarriage legs horizontal, so
that the model stands straight. Now glue the axle mounting
brackets (38) and the 1.5 Ø x 25 mm CFRP axles (24) to
the legs. Slip the spacer rings (44) and the wheels (31) onto
the axles, together with the wheel spat holders (40). Glue
the wheel spats to the holders and the spacer rings, taking
care to leave the wheels free to rotate.
®
Apply UHU POR sparingly to the undercarriage fairings
and glue them to the undercarriage legs.
Fig. 8
6. Installing the side force generators and elevator
linkages:
Use a servo tester or your radio control system to set the
rudder and elevator servos (Hitec HS-40 # 11 2040) to
centre (neutral), and attach the large double-ended output
levers (supplied with the servos) to the output shafts. Only
one end of the lever is needed; cut off the other end. Locate
the second hole from the centre of the servo output lever
and drill it out to 1 mm Ø. Glue the elevator servo in the
aperture by applying a small drop of Zacki at each mounting
lug. Now glue the elevator horn in the elevator. Thread six
pushrod guides onto a 1.0 Ø x 500 mm CFRP rod (23), then
glue the guides in the slots in the underside of the fuselage.
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