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GRAUPNER BO 209 MONSUN Instructions De Montage page 19

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Installing the motor
17. Solder the leads from the speed controller to the motor terminals, soldering the suppressor
capacitor to the terminals at the same time.
18. Use a servo tester to check that the motor and speed controller work properly. Do not fit the
propeller at this stage.
19. Cut out the motor cowl.
20. Temporarily fix the geared motor in place with just one 2.2 Ø x 6.5 mm self-tapping screw, then fit
the motor cowl and propeller and check the motor's location and alignment. Adjust the position of
the geared motor on the motor mount if necessary.
21. Fix the geared motor in place at the defined position using four 2.2 Ø x 6.5 mm self-tapping
screws.
The noseleg unit
22. Fix the wheel spat and nosewheel to the noseleg using the method already described. Glue the
spat in place using UHU plus acrylit.
23. Glue the noseleg in place together with the plywood support. Cut away the motor cowl to clear
the noseleg, then fit the cowl on the model, position it carefully and secure it with four 2.2 Ø x 6.5
mm self-tapping screws.
The canopy
24. Cut out the clear blue-tinted canopy along the marked lines, and check that it fits snugly on the
fuselage.
25. Cut out the canopy frame from the thinner white vacuum-moulded part, and sand back the edges
if necessary. Carefully cut out the openings in the canopy frame one by one, and sand the cut
edges smooth.
26. The canopy frame can be fixed in place using thin double-sided tape (e.g. TESA Fotostrip). The
canopy itself can also be fixed to the fuselage in the same way.
Installing the receiving system
27. Screw the servos in place as shown in the Stage photos. Form a double-bend in the front end of
the pushrods, connect them to the servo output arms, then screw the arms on the servos.
28. Fix the NiMH flight pack and the receiver in the fuselage using self-adhesive Velcro (hook-and-
loop) tape. Route the receiver aerial out of the underside of the fuselage, run it to the tail end and
tape it in place.
29. Connect a 100 mm servo extension lead to the receiver, and plug the aileron servo into the other
end.
Balancing
30. Check the model's Centre of Gravity: it should be 40 to 45 mm aft of the wing root leading edge. If
you have built the model exactly as described, the CG will automatically be in this range. Fine
adjustment can be carried out by altering the position of the flight battery.
Decal sheet
31. Cut out the individual decals and apply them to the model in the arrangement shown in the kit box
illustration.
Flying
32. Charge up the transmitter battery and the NiMH flight pack. Check the control surface
movements, and set the travels as stated:
Ailerons
6 mm up, 6 mm down
Elevator
approx. 6 mm up, 6 mm down
Rudder
approx. 15 mm to each side
Hold the model with the wings level, nose directly into any breeze. Switch the motor on, and give the
model a firm launch with the nose horizontal. Allow the model to climb straight ahead to a height of
about 30 metres before touching the transmitter trims; adjust the trims to obtain "hands-off" straight
and level flight.
Start by using small stick movements until you feel familiar with the model's handling. Always land the
model exactly into wind, preferably on a perfectly flat, closely mown grass surface. Slow or stop the
motor close to the ground, and flare the model with careful use of up-elevator.
19

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