Manual Multiplex Mini Mag 21 4211 (page 23 of 56) (English, German, French, Italian, Spanish)

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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

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

surfaces of the fuselage shell 3. Now join parts 3 and 4

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 74 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 50 to the motor mount 60 + 61. If you are

using the geared motor, cut down the motor mount 61 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 23 are fitted in the canopy 5 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 22. 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 25 in the outermost hole of the

elevator horn 24, and secure it with the washer 26 and nut

27. 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 28 in the pushrod connector 25 using the allen

key 29; do not tighten it at this point.

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

prepared horn 24 in it, with the row of holes facing the hinge

line. Fig. 26

14. Attaching the horn to the rudder

Fit the pushrod connector 25 in the outermost hole of the

rudder horn 24, and secure it with the washer 26 and nut

27. 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 28 in the pushrod connector 25 using the allen

key 29; do not tighten it at this point.

Apply activator to the recess in the rudder

, and glue the

prepared horn 24 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 7 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 40 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 8 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 41 and 42 through

the pushrod connectors 25, set the servos and control

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

grubscrews 28. You may find it necessary to bend the

pushrods slightly to obtain correct alignment.

Figs. 31 - 32

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Multiplex Mini Mag 21 4211 Manual

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