GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
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02/2007
10
Attach the rudder to the fin by gluing the hinges in place, as described for the elevators,
and complete the linkage in the same way.
The next step is to install the elevator and rudder servos in the mounting plate in the
fuselage, as shown in the following photos.
Drill out the linkage holes in the servo output arms to 1.8 mm Ø in order to accept the
pushrods.
Set the control surfaces and servos to centre, and mark the point on the pushrods where
they cross the servo output arms. Bend the pushrods at right-angles at the marked
points using a pair of flat pliers, and remove excess rod length; they should project
beyond the retainer clips by about 1.5 mm.
Fit the retainer clips and push them onto the pushrods from the side.
Assembling and installing the fueltank
Cut a piece of silicone fuel tubing and push it onto the fueltank clunk weight. Push the
free end of the fuel tubing onto one of the tubes in the fueltank stopper, and check that
the clunk will be able to move freely inside the tank
without
binding or jamming when
the stopper is in place. Use a match or a heat-gun to soften the projecting plastic tubes,
and bend them to the shape shown in the illustration. Check that one pipe points down
(filler line) and one up (vent line; this is the overflow when you are filling the tank).
Push the stopper into the tank and tighten the cross-point clamping screw. Ensure that
the screw is tight enough to seal the fueltank completely. You can check this by holding
the tank under water: blow into the tubes and watch carefully: if bubbles rise, there is a
leak which must be sealed.
Cut three pieces of silicone fuel tubing and push them onto the tubes where they exit the
fueltank.
Mark the fuel lines using a felt-tip pen or coloured tape to indicate which is the fuel feed,
the overflow and the filler.
Fit the fueltank through the wing saddle and into the tank compartment in the fuselage,
slipping the three silicone fuel tubes through the hole in the nose bulkhead.
Fit a rubber band between the projecting tongues of the bulkhead behind the fueltank;
this pulls the tank forward, and ensures that it cannot shift in flight.
If you intend to install a petrol engine, the fueltank stopper supplied in the kit must be
replaced with a petrol-resistant equivalent, e.g. Order No. 133. The silicone fuel tubing
must also be replaced with a type suitable for petrol, e.g. Order No. 1325.2.
Installing the glow motor
The instructions and photos show the installation of an OS MAX FS 120 four-stroke
motor, but the procedure is basically the same if you fit a different OS MAX power plant.
Fix the motor mount to the nose bulkhead using the screws supplied; remember to
secure each screw with a drop of thread-lock fluid.
The next step is to screw the glow motor to the motor mount. Note that the distance
between the nose bulkhead and the front face of the propeller driver should be around
145 mm. With the motor in this position, mark the location of the holes in the mounting
lugs on the mount arms: a good method is to use a drill bit the same diameter as the
holes in the mounting lugs, and twist it lightly to make a mark. Remove the motor, drill
the holes for the retaining screws at the marked points, and fix the motor to the mount.