GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Keine Haftung für Druckfehler. Technische Änderungen vorbehalten!
09/2006
23
Building instructions
Installing the motor and battery support
The GRP fuselage (4) is designed for a spinner diameter of 38 mm, and a suitable motor bulkhead (9) is
supplied in the kit. However, if you intend to install either of the recommended COMPACT motors, you
should use the larger bulkhead (5), as this provides better cooling for the motor.
Fix the bulkhead to the motor using the M3 machine screws (7) and washers (8). Place the motor
assembly in the fuselage and check that the propeller shaft projects by at least 10 mm at the front. You
may need to reduce the diameter of bulkhead (5) to achieve this.
Fig. 1
shows the complete electric power system, with the bulkhead (5) already screwed to the motor.
If you wish to use a 45 mm Ø precision spinner, you will need to shorten the front end of the fuselage by 8
mm.
Place the spinner on the propeller shaft, and check that the motor is correctly positioned. When you are
satisfied, tack the bulkhead to the fuselage with a few drops of epoxy.
Let the glue set hard, then unscrew the motor and apply a fillet of epoxy all round the bulkhead from the
front and on the inside of the fuselage.
Caution: be sure to apply a drop of UHU Schraubensicher (thread-lock fluid) to the M3 screws
which retain the folding propeller blades.
Glue the battery support (6) in the fuselage, and wipe thin cyano over the surface of the wood; this
ensures that the self-adhesive Velcro (hook-and-loop) tape (29) adheres strongly when it is applied later.
Fig. 2
shows the COMPACT motor installed, with the battery support (6) glued in the fuselage and the
Velcro tape (28 / 29) stuck to it.
Canopy
Place the canopy on the fuselage and trim the edges if necessary. Sand off any rough edges from the
moulding.
Bend the locating peg (11) to the shape shown, and place it in the fuselage. Glue the peg to the canopy
(10) using a little Stabilit Express, and leave the canopy on the fuselage with the fuselage resting upside
down.
Tack the canopy latch (12) in the canopy, again using a little Stabilit Express.
Allow the glue to set hard, then remove the canopy and apply a generous fillet of glue round the locating
peg (11) and the canopy latch (12).
Fig. 3
shows a cross-section through the canopy and the wing retainer system. Drill the holes for parts
(11), (12) and (32) in the fuselage in the positions shown.
Wing retainer cross-piece
Trim the plywood cross-piece (13) to fit, and glue it in the fuselage in the position shown on the plan.
Fit the wing panels together on the steel joiner rods (35) and (36), and place the wing on the fuselage. Set
the wing exactly central and “square” relative to the fuselage, and tape it in this position. Drill two 5 mm Ø
holes in the cross-piece, working through the holes which are already drilled in the wing.
Remove the wing, and drill out the holes in the cross-piece to 7 mm Ø.
De-grease the captive nuts (14), sand the joint surfaces and glue them to the underside of the cross-
piece. Place the fuselage upside-down and allow the glue to cure.
Installing the elevator and rudder servos
Remove the output levers from the elevator and rudder servos, and shrink a heat-shrink sleeve (17) round
the case of each .
Connect the two tail servos to their respective extension leads, and set them exactly to centre (neutral)
using a servo tester. Cut down the output levers as shown, and fit them on the servo output shafts. Make
up the elevator and rudder pushrods from parts (18) and (19). Note that parts (19) are supplied as M2 x 30
cheese-head screws; simply snip off the screw-heads to make the pushrods. Connect the pushrods to the
servos, and glue the servos in the fin using Stabilit Express.
Fig. 4
shows the position of the servos in the fin. In the interests of clarity the servos are not fitted in their
heat-shrink sleeves, and the retainer clip is not fitted to the extension lead.
