Multiplex MPU13209 Building Instructions Download Page 23

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Check that the parts fit together snugly, and carry out any
minor trimming required before reaching for the glue bottle.
Glue the wing bolt support assembly

33 / 34

in one fuselage

shell. Apply a thin coating of activator to the fuselage shell

and allow it to air-dry, then apply thick cyano to the mating

surfaces of the fuselage shell

. Now join parts

and

carefully and align them quickly. The fuselage joint line must
be straight, i.e. it must not be curved!

Figs. 14 - 15

8. Installing the undercarriage support

Fit the undercarriage support

on the underside of the

fuselage “dry” (no glue), and press the spikes into the
fuselage material. Remove the support, then carefully apply
cyano to the joint surface on the fuselage, not forgetting
the pierced holes. Apply activator thinly to the undercarriage
support, and press it firmly into place.

Fig. 16

9. Preparing the motor installation

You now have to decide which power system you want to
install:

1. Standard - Permax 400, direct drive
5 x 4” Guenter or MPX propeller

Included in the kit

Fig. 17

2. Standard G Permax 400 with 3:1 gearbox

Fig. 20

Easy Glider E power set
(Permax 400 with 3:1 gearbox)

# 33 2688

plus 3.5 mm Ø propeller driver

# 33 2310

and 8 x 3.8” propeller

# 73 3139

3. “Sport” power set: BL-X 22-18

# 33 2627

The set includes the propeller driver and propeller

Attach the motor

to the motor mount

60 + 61

. If you are

using the geared motor, cut down the motor mount

to a

length of 25 mm.

Fig. 20

10. Connecting the motor

Carry out a test-run! The propeller must always rotate anti-
clockwise when viewed from the front. Reverse the motor
terminal connections if the motor spins in the wrong
direction.

11. Installing the motor

Dry-fit the motor assembly (no glue):

Figs. 19 and 21

;

carry out any minor adjustments required. Apply CA to the
whole surface of the motor mount and carefully fit the
assembly in the fuselage.

Fig. 18

12. Installing the canopy latch lugs in the canopy

The canopy latch lugs

are fitted in the canopy

as a

mirror-image pair, i.e. with the lugs facing inward. Apply CA
to the ridged areas - in this case activator should not be
used - then push the lugs into the slots in the canopy. Fit
the canopy on the model, and allow the latch lugs to engage
in the latch clips

. Immediately position the canopy

accurately. Allow the glue to harden for about one minute,
then carefully open the canopy again. Apply activator to
the joint areas between the latch lugs and the canopy.

Fig. 22

Fit the canopy on the fuselage again, and check that it fits
neatly.

Fig. 23

13. Attaching the horn to the elevator

Fit the pushrod connector

in the outermost hole of the

elevator horn

, and secure it with the washer

and nut

Fig. 24

Caution:

note the side on which the connector is fitted!

Tighten the nut gently until the connector swivels smoothly,
but without slop, then apply a tiny drop of cyano to the
outside of the nut on the point of a pin. Fit the socket-head
grubscrew

in the pushrod connector

using the allen

key

; do not tighten it at this point.

Apply activator to the recess in the elevator, and glue the
prepared horn

in it, with the row of holes facing the hinge

line.

Fig. 26

14. Attaching the horn to the rudder

Fit the pushrod connector

in the outermost hole of the

rudder horn

, and secure it with the washer

and nut

Fig. 26

Caution:

note the side on which the connector is fitted!

Tighten the nut gently until the connector swivels smoothly,
but without slop, then apply a tiny drop of cyano to the
outside of the nut on the point of a pin. Fit the socket-head
grubscrew

in the pushrod connector

using the allen

key

; do not tighten it at this point.

Apply activator to the recess in the rudder, and glue the
prepared horn

in it, with the row of holes facing the hinge

line.

Fig. 26

15. Freeing the elevator and rudder

Work the rudder and elevator to and fro repeatedly to free
up the hinges; they will eventually move relatively easily.
Take care not to separate the control surfaces!

Figs. 25 +

16. Gluing the tail surfaces to the fuselage

Position the tailplane

on the fuselage “dry” (no glue) and

check that it fits correctly. Ensure in particular that it is
parallel to the wing saddle, and that there is no gap between
the tailplane and its mount. You can check this by laying
one of the spar tubes

on the wing saddle (e.g. secure it

with masking tape). Now sight over the spar from the
fuselage nose and check that the tailplane is parallel to it.
When you are confident that the tailplane can be aligned
correctly, glue it to the fuselage. Check that alignment is
correct and there are no gaps, then leave the glue to cure.
Place the fin

on the fuselage and tailplane “dry”, and

check it for fit. It is important here that the fin is a snug fit,
and is at 90° to the wing saddle and the tailplane; use a
setsquare or similar tool to check this.

Fig. 30

17. Retaining the elevator and rudder pushrods

Fit the front end of the steel pushrods

and

through

the pushrod connectors

, set the servos and control

surfaces to neutral (centre) and tighten the socket-head
grubscrews

. You may find it necessary to bend the

pushrods slightly to obtain correct alignment.

Figs. 31 - 32