extra 300 hp - Graupner

Four hardwood blocks have to be glued to the nose bulkhead in order to support the
cowl retaining screws.
The cowl mounting points have to be marked on the fuselage before the cowl can be
installed. Apply pieces of paper masking tape to the fuselage and mark these points
to the rear of the cowl. If you now slide the cowl into position on the fuselage, the
mounting points can be transferred to the moulding.
When fitting the cowl ensure that the nose fairing lines up correctly with the spinner
backplate. There should be about 1.5 mm clearance all round between the spinner
backplate and the nose fairing when the cowl is in its final position.
You may need to cut various openings in the cowl to clear the cylinder head /
glowplug, silencer, needle valve, wing etc.; the positions will vary according to the
engine you have installed. Drill holes initially, then file the openings out to final size.
The ON / OFF switch can be installed in the right or left side of the fuselage. Cut
away the covering film to suit the switch you wish to use, and install the unit using the
retaining screws supplied with it.
Assembling the EXTRA 300 HP
To make it easier to connect the aileron servos to the receiver, we recommend that
you connect a 180 mm extension lead to each of the appropriate receiver sockets (2
and 5).
Fit the wing joiner tube through the fuselage, and slide both wing panels onto the
tube. Fit the four plastic screws to hold the wings against the fuselage sides, but take
care not to over-tighten them; tighten them just to the point where the wings are firmly
seated. The screws are supplied overlength; they can be shortened by about 20 mm
if you wish.
Balancing the EXTRA 300 HP
Support the assembled model (fueltank empty) under both wing roots at a point
about 100 to 110 mm aft of the wing root leading edge. If the CG position is correct,
the model will hang level, with the nose inclined slightly down. If necessary, glue lead
ballast to the nose or tail to obtain the correct balance, or re-position the receiver
battery. All the control surfaces must be exactly at centre when the transmitter sticks
and trims are in the neutral position; check this before the first flight.
Control surface travels for normal flying
Ailerons 30 mm up, 30 mm down
Elevators 40 mm up, 40 mm down
Rudder 95 mm right, 95 mm left
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler 12/2007
50