GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler 02/2007
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required.
Place the cowl on the model, and fit the spinner backplate on the motor shaft: the fairing for the
spinner should line up accurately with the spinner backplate, and there should be an even gap about
1.5 mm wide between the spinner backplate and the cowl. The cowl is attached to the fuselage by
means of four pan-head self-tapping screws; note the marked points on the cowl.
Assemble the tailwheel unit as shown in the photos, and screw it to the tail end of the fuselage and the
rudder after drilling pilot-holes for the screws.
Install the ON / OFF switch in the left-hand fuselage side: cut an opening using the switch bezel as a
template, and screw it in place.
Completing the wing panels
Glue the retract servo plate in the right-hand wing panel.
Allow the glue to set hard, then screw the servo to the plate.
Attach the two swivel pushrod connectors to the servo output disc, spaced about 25 mm apart. Ensure
that the connectors rotate smoothly, without noticeable slop.
The wings should be glued together using slow-setting adhesive such as UHU coll (white glue) or UHU
plus endfest (slow epoxy). Apply plenty of adhesive to one root rib, slide both wings onto the
aluminium joiner tube, and push the two root ribs against each other. Wipe off excess adhesive which
is squeezed out of the joint. Align the wing roots carefully, and tape the wings together to prevent them
shifting while the glue hardens.
When the adhesive has cured, use your fingertips to locate the openings in the wing for the
undercarriage, and melt away the excess film using a hot soldering iron.
The mechanical retract units must first be adjusted, i.e. the end-points have to be set correctly to suit
the model.
Connect the clevises on the pushrods to the retract unit actuating tongues, and slip the retract
pushrods through the openings in the retract units. Position the retract units in the recesses, mark and
drill the holes for the retaining screws, and fix the units in place using the screws provided.
Fit the wheels on the axles and attach the axles to the wire undercarriage legs. Check that the wheels
are located exactly in the centre of the wing recesses when retracted.
The wheels are attached to the axles of the retract units using collets and self-locking nuts.
The next step is to mark the exact length of the retractable wheel legs.
Remove the wheel legs from the retract units and cut them to length; a cut-off disc in a mini-drill is the
best tool for this. Note that a small flat section must be filed or ground into the wheel legs at the
appropriate point to accept the axle clamping screws. The wheels should be installed with about two
degrees of toe-in.
The output disc should be fitted on the retract servo in such a position that the two swivel pushrod
connectors are directly opposite each other when the servo is at the “retracted” end-point. Retract the
wheels by moving the pushrods to their end-points, then tighten the grubscrews to secure the rods in
the swivel connectors.
Apply a drop of UHU thread-lock fluid to the two grubscrews to prevent them working loose.
Use a hot soldering iron to melt away the film over the output arm slots in the servo mounts. Fix the
servos to the mounts using the screws supplied with them; drill 1.5 mm Ø pilot-holes beforehand, and
press the rubber grommets and metal tubular spacers in the mounting lugs. The spacers are then
used as a template for drilling the holes in the servo mounts for the retaining screws.
Connect the servo leads to the appropriate extension leads, and secure each connection with a drop
of glue or a heat-shrink sleeve. Fit an M2 locknut and an M2 clevis on each threaded pushrod.
Cut down the servo output arms as shown in the photo, press them onto the servo output shafts and fit
