Handleiding Multiplex Acromaster 21 4215 (pagina 16 van 40) (Duits, Engels, Frans, Italiaans, Spaans)

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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). Use medium or high-viscosity

(thick) cyano (”CA”) for all joints. When gluing

Elapor® parts always spray one face with activator,

and allow it to air-dry until the surface looks ”dry”

(takes about two minutes). Apply cyano glue to the

mating surface, then place the parts together and

immediately position them.

Please be cautious when working with cyano-

acrylate adhesives. These glues can harden in

seconds, so don’t allow them to contact your

fingers or other parts of your body. Always wear

protective goggles to guard against eye injuries.

Keep these materials well out of the reach of

children.

the large control surface travels required for 3-D aerobatics.

However, they are also useful for ”normal” aerobatics, as

the holes are the correct size for the pre-formed snake inner

rods. To fit the servo output arm extensions 43 cut off the

raised collar around the central hole in the original output

arm, and fix the parts together using the standard retaining

screw and the locating screw 49, as shown in Fig. 05. Don’t

over-tighten the screws, or the threads will strip!

Carefully lay the fuselage shells down flat, and connect the

pre-formed end of the steel inner rods (including snake

sleeves) to the servo output arms. For ”normal aerobatics”

use the innermost hole in the output arm extensions, and

for 3-D aerobatics the outermost hole. Apply cyano to the

channels for the snakes. Check once more that the fuselage

shell is exactly flat (straight), then glue the snake sleeve in

the channel. Fig. 06

5. Installing the motor mounts

Glue the two motor mounts 60 in the right and left fuselage

shells using cyano. Ensure that the mounts 60 fit flush with

the foam shells before you apply the glue. Fig. 07

6. Canopy latch

Glue the canopy latch clips 32 in the fuselage shells as

shown in Fig. 07.

7. Joining the fuselage shells

Tape the servo leads in the fuselage so that they don’t get

in the way when you join the fuselage shells. Offer up the

fuselage shells 3 + 4 ”dry” (no glue), and check that

everything fits correctly. Apply thick cyano to one shell, hold

the second shell against it, and check that the fuselage is

straight and correctly aligned before the glue sets. This may

take up to a minute, depending on humidity. Hold the

fuselage in your hands for a further two or three minutes,

checking constantly that the fuselage is still straight, because

the adhesive takes at least this length of time to cure. Fig.

Place the motor mount brace 62 between the rear ends of

the motor mounts (a pair of pointed-nose pliers is very useful

here) and secure it with cyano. Fig. 09

8. Preparing the tailplane

Glue together the elevator joiner components 46 + 47 on a

flat surface. It is important that the parts are not twisted

relative to each other.

Fig. 10

Cut slots for the hinges 42 in the tailplane 12 and the elevator

13 using a sharp balsa knife, positioned as shown in Figs.

11 + 12.

Ensure that the slots are in line with each other, and are

exactly central. Figs. 11 + 12

Install the hinges ”dry” and check that the elevators are

aligned correctly and move freely. Dismantle the parts. Glue

the elevator joiner 46 / 47 between the elevator panels 13.

Push the hinges about ¼ of the way into the elevators, apply

cyano to both sides, then immediately push them into final

1. Before assembling the model

Please check the contents of your kit.

You will find Figs. 01 + 02 and the Parts List helpful here.

Note: the control ”snakes” are supplied in the following

lengths, and will need to be cut to final length:

2 off 3 / 2 Ø x 480 mm snake outer sleeve

2 off 2 / 1 Ø x 500 mm snake inner tube

2. Preparing the control snakes

The first step is to cut the snake outers and inners to the

lengths stated below. To cut the sleeves, place them on a

hard surface and roll them to and fro under a sharp balsa

knife, so that they are grooved all round. They can then

simply be broken off.

3 / 2 Ø snake outer sleeves

54 = 480 mm 55 = 400 mm

2 / 1 Ø snake inner tubes

56 = 500 mm 57 = 420 mm

The short pieces of sleeve left over are not required for the

model.

Fig. 03

3. Completing the snakes

Prepare the control snakes by slipping the inner tubes 56 /

57 into the outer sleeves 54 / 55, followed by the steel inner

rods 52 / 53. Parts 54, 56 and 52 are required for the rudder,

and parts 55, 57 and 53 for the elevator.

4. Preparing the fuselage shells

The first step is to install the Tiny-S servos for rudder and

elevator in the fuselage shells 3 + 4. Place the servos in the

recesses and apply a drop of thick cyano or hot-melt glue to

secure them. Fig. 04

The servo output arm extensions 43 are used to produce

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