Multiplex Magister Notice De Construction page 25

trim the opening to fit neatly round the motor. It may be
necessary to extend the opening right to the front, depending
on the motor you are using. Don't leave any very small areas
projecting, as they will just break off.
Fig. 15 GP
Installing the aero-tow release
Apply activator to the fuselage insert 5 and glue the aero-tow
mechanism 76 in the channel in the insert.
Fig. 16
If you intend to use the aero-tow release at any time, it is
important not to allow glue to get on the fuselage insert 5 when
gluing the fuselage shells together. To install the aero-tow servo
at a later stage, slice through the side lugs of the fuselage insert
using a balsa knife, and pull the insert up and out.
To operate the aero-tow release you will need one additional
servo. The servo can be installed at this stage or at any later
time.
Connect the tow release pushrod (e.g. 1 mm Ø spring steel
wire with one Z-bend) to the innermost hole in the servo output
arm and slide the servo into the recess in the fuselage insert.
Set the servo output arm to the "towline locked" end-point and
cut off the projecting pushrod at a point just above the tow
mechanism. Carefully round off the cut end with abrasive paper
to avoid it snagging the towline.
Place or glue the fuselage insert 5 in the left-hand fuselage
shell 3.
Fig. 17
Preparing the noseleg snake
Slip the steel pushrod 70 for the steerable noseleg into the
snake outer sleeve 55 and solder the threaded coupler 71 to
the plain end; be sure to sand the end of the rod thoroughly
before soldering. Alternatively the coupler can be glued to the
end using UHU Plus Endfest 300 (slow-setting epoxy). In this
case allow the epoxy to cure overnight.
Fig. 18
Fit the pushrod assembly in the channel in the fuselage shell 4
running to the rudder servo recess, Z-bend first. Set the snake
outer 55 projecting by about 15 mm and glue it to the fuselage
shell, applying 5-minute epoxy inside and out.
Fig. 19
Assembling the fuselage
Apply activator to the joint surface of the right-hand fuselage
shell 4 where it meets the fuselage nose 6 / 7GP and allow it to
air-dry. Apply cyano to the joint surface of the fuselage nose 6
/ 7 GP and glue it to the fuselage shell 4.
Temporarily place the prepared motor mount assembly in the
left-hand fuselage shell 3 and check that it is a snug fit. Do the
same with the retainer plates for the undercarriage, wing and
tailplane.
When you are confident that everything fits properly glue these
assemblies in the left-hand fuselage shell one by one.
Caution: important!
The left and right fuselage shells can now be offered up to
each other, so that you can check that they mate together fully:
ensure that the various components fit exactly in the appropriate
recess in the opposite shell; if not, trim the right-hand shell
until they do.
Once you are sure that everything fits properly, apply activator
to the joint surfaces of the left-hand fuselage shell 3.
Apply cyano to the joint areas of the right-hand fuselage shell -
including the plastic motor mount parts - this is very important.
The joints between the wooden parts and the fuselage
mouldings can be reinforced later from the outside, as they are
mechanically locked in place anyway. It is essential to work
quickly when joining the fuselage shells - a second pair of hands
is a great help at this stage. Fit the two fuselage shells together
and ensure that the projecting plates fit correctly in the recesses
on the opposite side. Press the fuselage shells together
completely and ensure that the fuselage joint line is straight,
as this ensures a true fuselage.
Fig. 20
Assembling the noseleg unit
Fit a grubscrew 66 into each of the collets 64 (4.2 mm I.D.)
using the allen key 29.
Secure the nosewheel 63 on the noseleg unit 60 by placing a
collet on each side of it. Check that the wheel has sufficient
clearance to rotate freely, then tighten the grubscrews.
Fig. 21
Press the steering arm insert 67 into the steering arm 77,
cylindrical face first, and secure it with two grubscrews 66.
Fig. 22
The noseleg assembly can now be fitted into the integral bush
in the motor bulkhead from the underside. Fit the collet 64
between the top brackets, followed by the steering arm 77. Set
the noseleg flush with the top bracket, then tighten the collet
against the bottom bracket. Set the steering arm at right-angles
(90° to the direction of flight), resting against the top bracket.
Adjust the nosewheel to the "straight ahead" position, then
tighten the grubscrews.
Connect the clevis to the outermost hole in the steering arm.
Glue the snake outer to the projecting lug of the bulkhead brace
40 using 5-minute epoxy.
Fig. 23
Assembling the main undercarriage
Locate the two collets 65 (5.1 mm I.D.) with an additional 1 mm
Ø hole and fit a grubscrew 66 in each using the allen key 29.
Insert the pre-formed damper wire 62 in the extra hole and fix
it to the main undercarriage unit 61 using the collet 65. Repeat
the procedure with the second main undercarriage leg.
Fit the wheels 63 on the legs and secure each with a collet 64.
Fig. 24
Place the undercarriage retainer strap 78 over the channeled
rail 83 in the fuselage recess, with the hooked slot at the rear,
and mark the position of the holes using the retainer strap as a
guide. Drill 1.5 mm Ø holes at the marked points.
Insert the main undercarriage legs in the holes in the channeled
rail 83; the undercarriage legs should now rest snugly side by
side in the channel. Fix the undercarriage retainer strap 78 to
the fuselage using the four screws 68.
Fig. 25
Connect the rubber band 69 to the hook on the undercarriage
retainer strap 78, run it around the damper wire 62 and connect
it to the hook again. The rubber band significantly reduces the
model's tendency to bounce on landing.
Fig. 26
GP:
Preparing the throttle linkage for the glow motor
Solder the M2 threaded coupler 73 to the steel throttle pushrod
49.
Screw the plastic clevis 36 on the coupler. Slip the steel pushrod
49 through the snake outers 54 and 59.
Fig. 27 GP
25