Multiplex MERLIN Notice De Construction page 24

3.2 Completing the "inside" of the right-hand fuselage shell,
Fig. 10
Turn the fuselage shell over, cut the longeron 70 to a length of
276 mm and glue it in place. Now glue the wing retainer plate 49
and the fuselage hatch frame 40 in the right-hand fuselage side,
and align everything very carefully.
Ensure in particular that the wing retainer plate is correctly
positioned, otherwise it will not be possible to insert the wing
panels later. The best method of checking the position of the
wing retainer plate before gluing it to the fuselage shell is to
slide the right-hand wing panel into place temporarily.
The prepared elevator servo assembly AH can now be glued in
place: apply the adhesive to the long side of the servo frame 44
only. Deploy the servo lead towards the nose, and temporarily
secure it with adhesive tape. Finally glue the prepared elevator
mechanism HM to the fuselage shell.
3.3 Installing the elevator pushrod, Fig. 11 (see also Fig. 22)
Cut down the snake inner sleeve 63 to a length of 170 mm, and
the outer sleeve 65 to 140 mm. Slip the inner and outer sleeves
over the steel elevator pushrod 61. Set the servo output arm to
neutral from the transmitter, and connect the pre-formed end of
the steel pushrod to the innermost hole (lever length approx. 8
mm) of the servo output arm, working from the outside. Slip the
opposite end of the steel pushrod through the swivel pushrod
connector 25 mounted on the elevator mechanism HM, and
temporarily tighten the grubscrew 24 at the neutral position. The
outer sleeve can now be glued permanently in the channel in the
fuselage.
3.4 Completing the "outside" of the left-hand fuselage shell,
Fig. 12
Lay the left-hand fuselage shell 3 "flat" on your working surface
(table). Cut the fuselage longeron 68 to a length of 470 mm, and
glue it carefully in the fuselage shell, following the same procedure
as described in Step 3.1.
3.5 Joining the fuselage shells, Fig. 13
Offer up the two fuselage shells "dry" (no glue), and check that
they fit together neatly; it is a good idea to insert the left-hand
wing panel to check alignment. When you are confident that
everything fits snugly, glue the two fuselage shells together.
You will undoubtedly have noticed that the elevator servo is now
"locked in". Normally you will never again need access to the
servo, but if it should develop a fault you can "get at it" by cutting
open the fuselage at the point marked XX. Once you have replaced
the servo, the new "hatch" can be fixed in place again with a few
drops of cyano.
Apply glue to the joint surfaces, place the fuselage shells
together and align them accurately, working smoothly and
rapidly. Check that the fuselage is straight (i.e. neither bent
nor twisted). Insert the tailplane and the wing panels to check
alignment. If necessary, you will find that the position of the
fuselage shells can be adjusted slightly for a brief period after
joining, as the cyano adhesive takes a few minutes to cure
completely.
Glue the twin rudder horn (RA) 22 in place after completing this
stage.
3.6 Installing the rudder linkage, Fig. 14 (see also Fig. 25)
Glue the prepared rudder servo assembly AS in the fuselage,
applying the adhesive to the long sides of the servo frame 44
only. Deploy the servo lead towards the receiver compartment,
and temporarily tape it in place.
Cut the snake inner sleeve 64 to a length of 230 mm, and the
outer sleeve 66 to 180 mm. Slip the inner and outer sleeves over
the steel pushrod 62. Set the servo output arm to neutral from
the transmitter, and connect the pre-formed pushrod end (Z-
24
bend) to the innermost hole (lever length approx. 8 mm) of the
servo output arm, working from the outside. Slip the opposite
end of the steel pushrod through the swivel barrel 23 of the
rudder horn SA, and tighten the grubscrew 24 to fix it at the
neutral position. The outer sleeve can now be glued in the channel
in the fuselage.
3.7 Completing the glider / power-glider versions
3.7.1 Completing the glider version, Fig. 15
Glue the prepared glider nose-cone S to the fuselage.
3.7.2 Completing the power-glider version, Figs. 16 + 17
Glue the prepared power assembly AE to the fuselage as shown,
then temporarily install the speed controller, as described in
Step 7.2, and carry out a test-run (take care!) to check the direction
of rotation of the motor (anti-clockwise as seen from the front). If
the motor shaft spins in the wrong direction, swap over any two
of the three wires between the motor and the controller.
The propeller blades can now be fitted, as shown in Fig. 17.
4. Completing the tailplane, Fig. 18
Glue the left-hand tailplane panel 7 to the "tailplane joiner with
shaft" 52, and glue the right-hand tailplane panel 8 to the
"tailplane joiner with retainer" 53.
Temporarily install the tailplane in the fuselage by pushing both
panels in to the point where they engage together. To remove the
tailplane, press on the point marked X to unlatch the retainer.
5. Completing the wings
5.1 Installing the wing spars and wing retainers, Fig. 19
Remove rough edges from the wing spars 60 and check that
they are a snug fit in the wing panels. When you are satisfied
with the fit, glue the spars in the wings together with the wing
retainers 47 + 48. These joints must be strong, so take care at
this point! Glue the two twin horns 23 in the recesses in the
ailerons.
5.2 Installing the wing-mounted servos, Fig. 20
Cut the slots in the wing recesses to accept the servo mounting
lugs, and remove a little extra foam to accommodate the servo
lead. Push the prepared servo assemblies AQR and AQL into
the wing from the underside to the point where they lie flush with
the top surface of the wing; apply a drop of cyano to the servo
mounting lugs to fix them in place. Connect the two aileron
pushrods 29 to the holes in the servo output arms located 10
mm from the shaft centre, working from outside to inside, then
install the two prepared pushrods by connecting them to the
pushrod barrel connectors 23 and the twin aileron horns 22.
Check once again from the transmitter that the servos are at
neutral, then tighten the socket-head grubscrews 24 to clamp
the pushrods.
5.3 Releasing the ailerons, Fig. 21
The ailerons are released by cutting a slot 1 mm wide at both
ends using a sharp balsa knife; these points are marked with
an X.
Check that the ailerons move freely in both directions, then
temporarily fix the servo fairings 45 + 46 to complete the wings.
6. Joining the wings and fuselage, Fig. 22
Run the aileron servo leads through the wing retainer plate and
into the fuselage, so that they dangle out of the opening in the
underside. The wing panels can now be inserted into the
fuselage; ensure that the spars slide into the wing retainers on
each side. Push the wing panels together so that the projecting
tongues 47/48 engage inside the Wing retainer plate 49. To
remove the wings it is necessary to press the tongues down
gently with one finger until the panels can be withdrawn.
7 Installing the RC components, checking the working systems
7.1 Glider version, Fig. 23