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Assembling the model:
Preparation:
Check all the styrofoam parts carefully, and clean up any rough
edges using 150-grit abrasive paper before starting construction.
Start with the tailplane 15: locate the hinge channel on the
underside, and mark it carefully on the top surface. Run a soft,
rounded-point pencil along the hinge line on the top surface. This
ensures that the foam bends exactly along the recessed line, rat-
her than "giving" randomly around individual foam particles. For
safety's sake apply a strip of adhesive tape (e.g. Tesa multifilm)
centrally along the top of the hinge line. Repeat the procedure
with the hinge line of the rudder 16.
Fig. 6
At the bottom of the rudder 16 and the tail end of the fuselage
cut a slot for the leaf hinge 27; it should be exactly in line with the
main rudder hinge line.
Fig. 7
Glue the elevator joiner 48 to the elevators using 5-minute epoxy.
Lay the elevators down flat and weight them until the glue has
set hard, to ensure that they are exactly parallel.
Fig. 8
Glue the tailplane and fin 15/16 to the fuselage 5. Hold the
fuselage turtle deck in place to help you position the fin correctly,
but don't glue the turtle deck in place at this stage. Glue the hin-
ge 27 to the fuselage and rudder as you do this. Check that the
rudder is aligned correctly, and deflects freely to both sides of
neutral. Before the glue sets hard, carefully align the fin and
tailplane relative to the wing (tailplane / fin angle: 90°).
Fig. 9
Completing the fuselage:
Using a small round file (a screwdriver also works well) cut the
tunnels through the fuselage from the motor to the battery box
on the underside of the fuselage, and from the battery box to the
RC compartment.
Fig. 10
The undercarriage reinforcements 44 fit in slots on both sides of
the battery compartment on the underside of the fuselage. Before
installing the reinforcements, use a fine-tooth hacksaw blade to
cut slots 3 mm deep and 1.5 mm wide in them at the marked
points; the undercarriage units fit in these slots later. Drill two 3.5
mm Ø holes in both reinforcements at the marked points. Hold
the undercarriage reinforcements against the outside of the
fuselage, and drill 3.5 mm holes half-way through the styrofoam
from each side, using the reinforcements as a template. The
reinforcements can now be glued in the fuselage using 5-minute
epoxy. Cut two pieces of 3/2 mm Ø plastic tube 64 80 mm long,
and push them through the fuselage at front and rear to form
undercarriage attachment dowels. Set the tubes central while the
epoxy is still soft. Cut slots across the underside of the fuselage
for the undercarriage legs, using the 3 x 1.5 mm slots in the
reinforcements as a guide.
Fig. 11
Installing the RC system components in the fuselage:
The rudder and elevator control systems are based on the "snakes"
60/61, which run through holes cut in the tail end of the fuselage.
In order to position these holes accurately it is necessary to install
the servos in the fuselage. Screw the two servos to the mounting
rails 47 and check that this assembly fits in the fuselage. Shorten
the rails if necessary. Finally glue the servo rails 47 to the fuselage
sides, with the servos still attached.
Fig. 12a
If your model is # 21 4048, the kit does not include the RC system
components. In this case you can decide for yourself whether to
install individual servos or an "Einstein" or "The Brick" module (=
MULTIPLEX module containing receiver, two servos and switch).
Fig. 12b
Using side-cutters, a short pair of scissors or a saw blade, cut off
the lower part of the T-piece of the horns 20 leaving just a short
stub. Fit a pushrod connector 32 in the outermost hole of the
elevator and rudder horns 20. Slip the M2 washers 33 over the
threaded shank, then fit and tighten the nuts 34. Fit the socket-
cap screws 35 in the threaded hole in the pushrod connectors,
and tighten them using the allen key 76. Now glue the horns in
the recesses moulded into the control surfaces, with the row of
holes facing forward in each case.
Fig. 13
The holes for the snake outers 60/61 must be positioned to give
the wire pushrods 62/63 as straight a run as possible from the
servos to the control surfaces. The linkages must run smoothly
and easily.
Pierce the tunnels at the tail end of the fuselage using a small
round file or a screwdriver, and temporarily fit the snakes. Note
the position of the rudder and elevator horns 20 when you do
this. The snake outers should exit the fuselage side about 85 mm
forward of the tail end of the fuselage. Slip the pushrods (0.8 mm
Ø steel wire) into the outers and check that they run smoothly.
When you are satisfied, glue the snake outers to the fuselage using
5-minute epoxy.
Fig. 14
Form a Z-bend in one end of each of the steel pushrods, and
connect them to the fourth hole of the servo output arm (approx.
10 mm from the pivot axis).
If you are using an "Einstein" or "The Brick" module, bend the final
5 mm of the pushrods 62/63 at 90° at the servo end, and connect
them to the servo output arms (second hole from the centre -
approx. 10 mm lever length), fitting the plastic spacers 29 (0.8 to
1.6 mm) at the same time. Secure them with a drop of 5-minute
epoxy.
Fig. 12b
Check that the fuselage turtle deck 6 is a snug fit, trim it if
necessary, and glue it to the fuselage using 5-minute epoxy. While
you have a little spare epoxy mixed up, glue the tailskid 45 into
the tail end of the fuselage.
Fig. 15
The wing is attached to the fuselage by plastic screws which
engage in the wing plates 41 + 42; press the captive nuts 21 into
these and glue them with 5-minute epoxy. At the same time glue
the wing plates in the recesses in the fuselage. Be sure to keep
the epoxy out of the threaded part of the nuts.
Fig. 16
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