Multiplex 21 4226, Инструкция по сборке, Страница: 3 / 18

12
Important note
This model is not made of styrofoam™, and it is not possible
to glue the material using white glue or epoxy. Please be
sure to use cyano-acrylate glue exclusively, preferably in
conjunction with cyano activator (”kicker”). We recommend
medium-viscosity (thick) cyano. This is the procedure with
Elapor®: spray cyano activator on one face of the joint; allow
it to air-dry for around two minutes until the surface
appears to be “dry”, then apply cyano adhesive to the other
face. Join the parts, and immediately position them
accurately.
Please take care when handling cyano-acrylate adhesives.
These materials harden in seconds, so don’t get them on
your fingers or other parts of the body. We strongly
recommend the use of goggles to protect your eyes.
Keep the adhesive out of the reach of children!
1. Before starting construction
Please check the contents of your kit before you start
construction. You will find
Figs. 1 + 2 and the Parts List helpful
here.
Completing the fuselage and tail panels
2. Preparing the “snakes”
Check the length of the elevator snake sleeves 43 a nd 45 , and
shorten them if necessary.
43 3 / 2 Ø x 785 mm
45 2 / 1 Ø x 850 mm
Steel 41 0.8 Ø x 875 mm, insert!
Repeat the procedure with the rudder snake sleeves 44 a nd
46 .
44 3 / 2 Ø x 785 mm
46 2 / 1 Ø x 850 mm
Steel 42 0.8 Ø x 875 mm, insert!
Aerial sleeve 47 3/2 Ø x 785 mm (shorten if
necessary)
3. Installing the snakes in the fuselage shells
Important:
the fuselage tail boom is considerably
strengthened and stiffened by the addition of the snake outer
sleeves
43 a nd 44 , which must be glued full-length to the
shells in order to obtain the full effect. The same applies to the
aerial sleeve
47 .
Check that the snakes operate smoothly and freely, and take
care not to allow glue to run into the outer sleeves.
Left-hand fuselage shell:
Install the complete elevator snake (wire rod length = 875
mm) in the left-hand fuselage shell; the pre-formed end
should be at the front (servo end).
Fig. 3
Position the snake outer sleeve 43 flush at the front of the
fuselage shell, as shown in Fig. 4 . Lay the shell down flat and
run cyano along the whole length of the outer sleeve 43 and
the channel in the fuselage to glue the parts together strongly.
Fig. 5
Right-hand fuselage shell:
Install the complete rudder snake (wire rod length = 875mm)
in the right-hand fuselage shell. The pre-formed end should
be at the front (servo end).
Fig. 6
Position the snake outer sleeve 44 flush at the front of the
fuselage shell, as shown in Fig. 7 . Lay the shell down flat
(note the locating spigot; place the fuselage shell over the
corner of the table) and run cyano along the whole length of
the outer sleeve
44 and the channel in the fuselage to glue the
parts together strongly.
Fig. 8
4. Installing the aerial sleeve
Trial-fit the aerial sleeve 47 , cut it to length and glue it in the
right-hand fuselage shell - taking care not to bend or distort
the moulding.
Fig. 9
5. Installing the tow-hook
Glider version: glue the towhook 32 in the moulded recess in
the fuselage shell 4 .
Fig. 9
6. Installing the motor mount
Glue the motor mount 34 in the right-hand fuselage shell, and
wipe away any adhesive which is squeezed out. The exposed
face of the motor mount will later be glued when the shells are
joined; take care to keep adhesive off this area. Note that the
motor mount should also be installed in the glider version, as
it adds considerable strength.
Fig. 10
7. Installing the servos in the fuselage shells
Set the servos to “neutral” (centre) from the transmitter, and fit
them in the moulded recesses in the left and right fuselage
shells, as shown in
Fig. 11 . If you are using different servos,
you may have to trim the recesses slightly to obtain a close fit.
Lay the servo leads in the channel, running from bottom to top,
and tape them in place. Apply a drop of cyano to the servo lugs to
attach them to the foam material. Connect the pre-formed ends
of the wire pushrods to the servo output arms, and push the
arms onto the servos at an angle of 90° to the servo sides (don’t
forget to fit the servo output screws). Glue the plastic latch catches
22 in both fuselage sides as shown. Glue the extension leads in
the cable holders 36 , positioning the ends flush as shown in the
detail drawing. Glue the cable holders 36 in the moulded
recesses in both fuselage sides, pushing them in as far as they
will go. Deploy the leads carefully and glue the fore-and-aft
formers
37 in place.
Fig. 11
8. Joining the fuselage shells
The most suitable adhesive for this stage is thick cyano-acrylate,
used in conjunction with activator.
Caution: for the tuning version the balance weights 2 x 33 should
first be glued in the recesses at the tail, as shown in Fig. 12 .
The first step is to check “dry” (no glue) that the fuselage shells
3 + 4 fit together accurately; it may be necessary to carry out
minor trimming.
Spray cyano activator on the joint surfaces of the fuselage shell
4 and leave it to air-dry for about two minutes.
Apply cyano adhesive to the joint surfaces of the fuselage shell
3 , then join the parts carefully, taking care to align them accurately
and immediately. Note that the fuselage joint line must be
perfectly straight - no bends allowed!
Fig. 12
9. Installing the rudder hinge
Glue the rudder hinge 31 in the tail end of the fuselage using a
small amount of cyano. Take great care that no glue gets onto
the hinge pivot axis.
Fig. 13
Use a sharp balsa knife to cut a central slot for the rudder hinge
31 in the leading edge of the rudder. Take care: injury hazard!