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Multiplex DG-600 Bauanleitung Seite 15

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The servo plate 16 is die-stamped to suit MULTIPLEX nano an
Micor servos (2 aileron servos). if you are using different servos,
adjust the apertures as required, then trim the servo plate to fit
in the fuselage.
It you intend installing an aero-tow coupling, it is vital to use a
powerful servo, producing a torque of more than 2.0 cm / kg. lt is
mounted inverted on the servo plate (next to the fuselage side)
In a commerctat servo mount.
lf the ailerons and airbrakes are to operate smoothly and reliably
it is essentialto install the servo plate in exac y the right posi_
tion. Fix the servos to the plate (using quick - release mounts),
and position the plate in the fuselage. Slip the aileron and ai;-
brake pushrods 40 and 41 in the outers, leaving the root ends
qlgt_eclinS,
and plug the wings into the Iusetage.
snrfi the servo ptate in the fuselage until the pushrods run
exactly across the correct linkage point on the servos,outpul
arms. The cables should be pertec y straight - do not allow any
bends or curves at all. Check also that the servo plate is exacUv
horizontal in the fuselage.
Roughen up the inside oI the fuselage where the plate fits, and
fix it in place with drops of 5 - minute epoxy. When the glue has
set, remove the wings and servos and apply a fillet of slöw -sel
ling epoxy to secure the plate.
Rectractable undercarriage /fixed wheel
ll you are fitting a retractable or fixed wheel, the axle should be
located vertically below the wing teading edge. ptace the fusel_
age on a flal surface and rest a setsquare against the wing lead-
ing edge at the root. Now sight along the square onto the ünder_
sroe ol rhe lusetage and make a pencil mark at this point. The
wheel position is not crucial, and this method is quite accurate
enough. The full - size aircratt has a 350 mm diameter wheel.
which corresponds to a diameter ot about 65 mm on the model.
Compression strut
In an abrupt landing, the wings will tend to swing forward and
crush the luselage between the leading edges.
The compression strut 12 avoids this danger. lt is instalted bet-
ween the leading edges in the wing root fairing, and can be re-
moved at any time.
Cut an 8 mm diameterhole in both root fairingswhere marked.lt
is best to drill the hole out to 7 mm diameter in stages, and then
to file it out carefully untilthe strut is a tight fit, otherwise there is
a good chance that you will lose the strut. Cut the comoression
strut to length, and check that it ties exac y flush with the out_
side surlace of the root fairings. lt must not project on either
stoe.
Canopy
The fit of the canopy is one of the crucial factors in the overall
impression which a model aircraft makes, and forthis reason we
strongly recommend taking particular care at this stage. Take
your time - the effort will be worthwhile.
Place the cabin frame 6 on the fuselage, and check that the fit is
exactly right; it should be 1 mm smaller than the cabin f lange atl
round. Glue the instrument binnacle on the frame, trim thö ins-
trument panel 45 to tit, and glue it in ptace also.
Tape the frame on the fuselage, and drill the hole for the 3 mm
diämeter rivet I through the frame and the cabin flange. Insert
the rivet to check for fit, then remove the cabin trame and glue
the rivet into the lrame.
The canopy latch 7 is installed next. Markthe position ofthe slot
for the actuating pin using a felt -tip pen, and file the slot out
neatly using a small needle tile, after drilling a series of 1.5 mm
pilot holes. File out the hole in the cRp fuselage ftange lor the
bodyotthe latch to a diameter of 5 mm. Check that the tatch fits.
and file out the holes if necessary. Roughen up the latch bodi
and apply a drop of oil to the pin at either end. The latch is fixed
in the fuselage using 5 - minute epoxy. When the glue has set,
check that the latch still works, then apply a fi et oI slow-set-
ting epoxy, prelerably thickened as before, to secure it oerma-
nently. Leave the tusetage inverted while the resin cures.
Retract the latch pin and sand the front face of the tatch bodv
f lush with the GRP fuselage f lange. Now ptace the cabin fram;
on the fuselage, position it accurately, and press the latch pin
against it. This will leave a tiny dent, at which point you should
carelully drill a 3 mm diameter hole. Check that the cabin frame
seats accurately on the fuselage.
Cut out the canopy 5 along the marked line. The ideal tool is the
curved scissors in the MULTIPLEX accessory range. Trim the
edge ot the canopy until it is a perfect fit. lf you wish to paint the
cabin frame, fit selfadhesive instruments and so on. this is vour
last chance to do so.
The following section describes the method oI obtaining a per-
fectly fitted canopy. Please follow the instructions to the tetter -
you will not be disappointed. To avoid soiling the fuselage, apply
a coat of release agent wax or similar material around the cano-
py Jlange. lt can easily be polished off again.when the job is fi-
nished.
Position the canopy frame on the fuselage and hold it down firm-
ly by tying thin thread (sewing cotton) round the fuselage; don,t
worry, the thread can easily be removed again later. The ends of
the thread can be taped to the underside of the fuselage if you
prefer. Place the canopy overthe lrame and position it aöcuräte-
ly. Apply a short strip ot coloured taoe at the front and rear
across the canopy and fuselage. then slit it along the joint line.
The tape provides an accurale means of lining üp the canopy
later. This is very important, as you will have litfle chance to ad-
just the position when the canopy is glued to the frame. Clean
the canopy and cabin frame, and apply clear contact cement to
the edge ol the frame only. lt is essential to work rapidly here, as
the contact glue must not be allowed to dry off in the normal
way.
Note: Do not apply contact cement to the canopy itself.
Place the canopy on the frame, lining up the strips ot coloufpf,
tape. Fix the canopy in place with strips ot tape, and carefi ,
wipe excess glue onto the tuselage side. The contact cemenl
can now be left overnight to harden. This is not the usual me-
thod ol using this adhesive, but it is ideal for our purDose. The
procedure guarantees a perfect joint between canopy and ca-
bin frame.
When the glue has set hard (at least 12 hours), cut the cotton
thread on the underside of the fuselage and caretully pull it
through and underthe canopy. Carefully prise the canoöyaway
lrom the fuselage. Press the canopy moulding onto tfie cabin
frame all round. Peel off the marker tapes, cheCk the canopy for
fit, and carry out any final trimming required.
The canopy latch actuating pin can now be cut down carefullyto
a minimum length, so that it is less consDicuous.
Aero - tow coupling
A simple and reliable aero - tow coupling can be installed as fol-
lows: file out a vertical slot 2 x 5 mm in the right - hand fuselage
side as lar forward as possible. Pilot - drill the hote lirst, and file
out to shape.
Bend the 2 mm internal diameter plastic guide tube 43 to match
the curvature ofthe fuselage, and cut it to correct length. Solde<
a clevis 39 to the end of the I mm diameter steel rod 58. slio t
rod into the tube. and connect the clevis to the servo oütput'
arm.
When the servo output arm is at neutral, the end of the steel rod
should be visible in the slot. Cut the steel rod to length, and de-
burr the cut end.
Note: Use a powerful servo, producing at least 2.0 cm / kg of tor-
que, and connect the steel rod as close to the output shaft
centre as oossible.
Roughen up the guide tube 43 and the fuselage side, and epoxy
the tube in place, with the rod pointing directty at the servo out-
put arm. lt may be necessary to support the guide tube with a
length ol wood while the glue is setting. Check that the system
works reliably.
Rudder
First check that the rudder has ample freedom of movement at
the top: it will be necessary to file out the rear section of the tail-
plane mount as shown in the drawing.
Cut the leading edge strip 22 to length, glue it to the front face of
the rudder, and sand the edges flush.
Mark a centreline on the lront tace ot part 22 from top to bottom,
and glue the hinge tube 43 exactly along this line. lt is best to in-
sert the pivot rod 44 in the tube tirst.
Glue the in{ill strips 46 on either side ol the oivot tube. and sand
their edges flush. Glue the other half of strip 22 on the front tace
of the rudder, and sand flush all round.

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