Multiplex PICO CUB Notice De Montage page 26

Installing the motor (# 21 4111 only):
The standard power system for the model is the direct-drive Per-
max 400 6V motor 71. The first step is to separate the motor plate
49 from the die-cut sheet; note that the in-fill piece 50 is not
required and should be cut out. The motor plate should butt up
against the fuselage at the rear. The bulkhead is intentionally
narrower than the surface on which it rests; this allows for the
thickness of the motor cowl, which is fitted later. Check that the
motor fits snugly in the motor plate, and glue the parts together
by applying a narrow fillet of 5-minute epoxy on both sides.
Fig. 17a
Run the motor power leads back into the battery compartment.
Temporarily fit the motor cowl, and adjust the position of the
motor and motor plate if necessary. When you are satisfied, glue
the motor plate to the fuselage using 5-minute epoxy.
Installing a motor with integral circular controller
If your power system includes a motor with integral circular
controller, it can be mounted as follows: the motor bulkhead 49/
50 is not used, and instead the wooden spacer 53 is glued in the
motor well, flush at the front. The motor can now be placed on
this and positioned accurately: it should project by 12 mm at the
front. Check this by fitting the motor cowl over it. When everything
fits, glue the motor to the foam on both sides and the wooden
spacer 53 at the bottom with a small fillet of 5-minute epoxy. Use
a small strip of tape to hold it in place while the glue sets.
Fig. 17b
Optional upgrade:
If you decide to install a geared motor, leave the in-fill piece 50
in the motor plate rather than cutting it out. Apply a few drops of
cyano to the die-cut slots to restore the plate's strength. Drill 2.5
mm Ø holes in the motor plate at the punched points. With the
motor plate in position on the fuselage, hold the geared motor
against the plate. Drill 2 mm Ø holes in the gearbox flange, working
through the existing holes in the motor plate, and fix the gearbox
to the plate using the screws 28. Place this assembly in the
fuselage again, and ascertain the correct position with the help
of the motor cowl, as described earlier. Check that the motor plate
rests flat on the fuselage, and open up the space under the motor
slightly if necessary. The motor case should end flush with the
front face of the fuselage. When you are sure that everything fits
correctly, glue the motor plate to the fuselage using 5-minute
epoxy.
Fig. 18
Motor cowl:
Cut out the cowl 7 and drill holes at the marked points. If you
have installed a geared motor, open up the hole for the output
shaft to the larger marked diameter. Check that the cowl fits really
accurately, trim where necessary, then drill 2.5 mm Ø holes on
both sides for the retaining screws. Screw the cowl to the retaining
plates 51 using the screws 28, then apply 5-minute epoxy to the
edge of the plates facing the fuselage. Taking care not to wipe
the epoxy off, position the motor cowl on the model, push it back
into position on both sides and tape it to the fuselage. This ensures
that the cowl retaining plates are correctly positioned. Allow the
epoxy to set hard, then undo the screws to remove the cowl.
Fig. 19
Installing the undercarriage:
The undercarriage is assembled from the wire legs 80 - 82 and
the spacer sleeves 84. A simple jig is required to ensure correct
alignment. Take a piece of card and draw two parallel lines on it
26
spaced 100 mm apart. The undercarriage legs are later glued
together and taped down directly over these lines.
Sand the ends of the undercarriage legs, fit the washers 86 on
them, apply 5-minute epoxy, then fit the spacer sleeves 84 and
the wheels 83, and fit the screws 85 while the glue is still soft. Be
sparing with the epoxy, and on no account allow it to get onto
the outside of the spacer sleeves. It is a good idea to grease the
outside of the sleeves lightly before gluing the parts together, as
this effectively prevents them becoming stuck to the wheels. Align
the undercarriage components accurately and leave the assembly
until the epoxy has set hard.
Fig. 20
Joining the wing panels
The first step is to assemble the spar 40 from the two strips of
balsa supplied. Work carefully, exactly as shown in the drawing,
and weight the parts down flat until the glue has set hard.
Fig. 21
Check that the wing panels 10/11 fit together accurately, and trim
the root faces slightly if necessary so that the panels fit together
without any gaps. Pack up one wing tip by about 12 cm, e.g. on a
pile of books, to produce the correct dihedral of about 12°. Use
the prepared spar to aid alignment.
Place the vacuum-moulded wing reinforcement 12 over the rear
part of the wing to fill the opening, and glue the moulding in
place from the underside using 5-minute epoxy. Glue the in-fill
strip 52 in the wing reinforcement at the same time.
Glue the prepared spar and the front wing reinforcement 43 (hole
facing wing leading edge) in the wing. When the glue has set hard,
drill a 4.5 mm Ø hole vertically through the foam from the
underside. Open up this hole on the top surface to accept the
screw sleeve 26.
Fig. 22
Seal the hole in the front wing reinforcement 43 with a strip of
tape, and fill it with epoxy to the point where there is still just
enough space for the reinforcing sleeve 26 itself. Push the sleeve
into place and carefully wipe off excess resin. Apply a strip of
adhesive tape over the top until the glue has set hard. When the
glue has cured, remove the tape and run a 4.5 mm Ø drill bit
through the sleeve and the front reinforcement to clear the hole.
Cut a hole in the recess in the top of the vacuum-moulded rear
reinforcement. Check that the holes line up with the captive nuts
in the fuselage when the wing screws 24/25 are fitted. Trim the
holes as necessary to compensate for any inaccuracy in
construction.
Assembling the model:
Using 5-minute epoxy, glue the "hook" tape 22 in the battery
compartment to take the speed controller and flight pack. Note
that the adhesion of the self-adhesive tape is not sufficient by
itself on styrofoam; glue is required.
Attach the undercarriage using the four rubber bands 30: fit a
rubber band over one of the undercarriage dowels, wind it round
the dowel and the undercarriage leg as many times as possible
whilst keeping the band slightly taut, then slip it over the dowel
again. Repeat the procedure with the other three dowels.
Fig. 23
You are now ready to carry out the first test run using the radio
control system.