Multiplex Dog-Fighter Notice De Construction page 15

Important note
This model is not made of styrofoam™, and it is not possible to glue the material using white glue, polyurethane or
epoxy; these adhesives only produce a superficial bond which gives way when stressed. Use medium-viscosity
cyano-acrylate glue for all joints, preferably our Zacki-ELAPOR®, # 59 2727 - the cyano glue optimised specifically for
ELAPOR® particle foam. If you use Zacki-ELAPOR® you will find that you do not need cyano 'kicker' or activator for
most joints. However, if you wish to use a different adhesive, and are therefore obliged to use kicker / activator spray,
we recommend that you apply the material in the open air as it can be injurious to health. Please be careful when
working with any cyano-acrylate adhesive: these glues can harden in seconds, so do not allow them to contact your
fingers or other body parts. Wear goggles to protect your eyes!
1. Before assembling the model
Please check the contents of your kit before you start
working on it. You will find Figs. 1 + 2 and the Parts List
helpful here.
2. The fuselage
The first step is to glue the two 'snake' outer sleeves 51 in
the internal channels in the fuselage shells 4 + 5. Glue the
latch catches 22 and the motor mounts 37 in both fuselage
shells as shown.
Figs. 3 + 4
3. Preparing the wing spreader plates
Clip together the wing spreader plates 33 + 34, using a pair
of flat-nose pliers if necessary, and glue the joints soundly.
Glue the prepared wing spreader plates in the right-hand
fuselage shell.
Figs. 5 + 6
4. Option: preparing the rudder
If you wish to install a working rudder, the first step is to
free up the hinge: cut through the horizontal separation line
at the top of the rudder, taking care not to cut it off
completely! Carefully cut away the linking lugs inside the
edges of the hinge channel using a sharp knife, so that the
hinge is no longer obstructed in its movement. Deflect the
rudder repeatedly to each side, moving it through about
45° each way.
You may wish to reinforce the rudder hinge at the bottom
by fitting a separate plastic film hinge.
Fig. 7
If you are fitting a working rudder, the cover over the servo
well in the right-hand fuselage shell must be cut away as
shown.
Fig. 8
5. Installing the servos in the fuselage
First set the servos to "neutral" from the transmitter, and fit
the output arms in such a way that they are at right-angles
to the case side.
Trial-fit the servo mounting frames 42 in the fuselage shells
4 + 5 before gluing them in place.
Figs. 9 + 10
Press the servos into the frames until the tongues snap
over the mounting lugs to secure them.
Fix the servo leads in place using paper masking tape, so
that the wires and connectors cannot cause damage, and
do not get in the way when the shells are joined.
Figs. 11 + 12
6. Preparing the control surface horns
Caution: the elevator and rudder horns must be prepared
as a mirror-image pair (different right and left). Fit the swivel
pushrod connector 25 through the outer hole in the horn
24, and secure it with the washer 26 and nut 27. Caution:
note the orientation in the pictures! Ensure that the
connector barrel rotates smoothly, but without noticeable
slop. When you are confident that all is well, secure the
nut with a small drop of cyano (applied on a length of wire
or a tooth-pick). Fit the socket-head grubscrew 30 in the
top of the swivel connector barrel 25 using the allen key
31. Repeat the procedure with the second horn.
Fig. 13
7. Installing the control surface horns
First spray activator in the horn recesses in the rudder and
elevator 9, and allow about two minutes for the fluid to air-
dry. Apply cyano to the prepared horns, and push them
into the recesses. Work carefully here to avoid cyano running
into the pushrod connectors and jamming them.
Figs. 14 + 15
8. Joining the fuselage shells
Offer up the fuselage shells 4 / 5, initially "dry" (without
glue). When you are confident that everything fits properly,
the shells can be glued together. Keep the fuselage perfectly
straight while the glue is curing.
Fig. 16
9. Installing the tailplane
First free up the hinge lines by moving the elevators to and
fro, but take care not to stress them by deflecting them too
far (maximum 45°). Don't separate the control surfaces!
Offer up the tailplane by sliding it into the slot in the fuselage,
and carry out any minor trimming required. When you are
satisfied, align the tailplane carefully and glue it in place.
Fig. 17
10. Installing the rudder in-fill piece
The in-fill piece 6 can now be fitted. As noted previously:
trial-fit first, and only then glue it.
Fig. 18
10. Connecting the rudder and elevator pushrods
The servo output arms are connected to the control surface
horns using the pre-formed steel pushrods 46 and 47.
"Wiggle" the "Z"-end of the pushrod through the hole in the
servo output arm (warming the wire will help), then slip the
straight end through the swivel pushrod connector. Note
that the rudder and elevator pushrods should be connected
to the inner holes at the servo output arms. For the elevator
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