GRAUPNER 9545 Instruction Manual

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
1
Order No. 9545
BUILDING INSTRUCTIONS
LEKI EXTRA 330SC
For electric power system and 3 x 2200 mAh LiPo cells
This model requires an HoTT radio control system
with at least four functions

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
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It is essential to read and observe the Safety Notes in the Appendix to these instructions. If you
ever dispose of the model, be sure to pass on these safety notes to the new owner, together
with the complete building instructions.
Introduction
The LEKI EXTRA 330SC is a superbly manoeuvrable RC aerobatic model which is
an excellent choice for simple aerobatics and extreme 3-D flying alike. Please note:
the aeroplane is by no means suitable for beginners. The model is very highly
pre-fabricated, but nevertheless the construction stages described in these instruc-
tions must be carried out with great care, otherwise we cannot guarantee that the
model will fly accurately and safely. The all-up weight must not exceed 1350 g.
RC system accessories and electric power system components (not included)
You will need the items listed below in order to complete and operate the model.
GRAUPNER MX-16 2.4 HoTT RC system Order No. 4755
Transmitter charge lead Order No. 3022
Charge lead with G3.5 connector Order No. 2970.L
ULTRAMAT 16S battery charger Order No. 6468
3/2200 LiPo flight battery, 45C Order No. 9722.3
Servo extension lead, 100 mm (two required) Order No. 3935.11
Servo extension lead, 180 mm (two required) Order No. 3935.18
Servo extension lead, 500 mm (two required) Order No. 3935.50
DES 476 BB servo (four required) Order No. 7915
COMPACT CONTROL 45BEC speed controller Order No. 7224
Tools and adhesives required (not included)
Balsa knife Order No. 980
Screwdriver Order No. 5779.1
Allen key, 1.5 mm A/F Order No. 5775.1,5
Cyano-acrylate adhesive (“cyano”) Order No. 5821
Cyano activator (“kicker”) Order No. 953.150
You will also need the following items: 11 mm A/F open-ended spanner, flat-nose
pliers, paper scissors, felt-tip pen.
Building instructions
Please read right through these building instructions before you start building, so that
you have a clear idea of the sequence required. Before each stage identify all the
parts, tools and adhesives you will need, and place them ready. Use a sharp balsa
knife to remove rough edges from the airframe components, and cut through any
temporary lugs produced by the moulding process. Do NOT separate the control
surfaces; instead flex them to and fro several times to free up the moulded hinges.
When working on foam components always lay the parts on a clean, smooth surface,
or a layer of soft foam. Use cyano glue and activator for all joints unless the instruc-
tions specifically state otherwise. The best method is to apply glue to one face, then
spray activator on the mating face before bringing the parts together.
Cyano-acrylates must not contact any part of your body, and especially not the
eyes. For this reason we recommend that you wear protective goggles when
using this material. Store the adhesive out of the reach of children. Do not use

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
3
‘foam-safe’ cyano, white glue or epoxy, as these adhesives do not produce
durable joints between any material and high-density SOLIDPOR® foam.
The power system
The illustration shows all the components of the power system. Note that the
propeller and spinner must not be fitted until the fuselage has been completed. Fix
the electric motor (1) to the motor mount (2) using four countersunk screws (3). The
E-PROP (6) is attached to the motor shaft at a later stage using parts (4) to (10).
Note that the retaining nut (8) must be tightened firmly using an 11 mm A/F spanner.
Fuselage and tail group
Glue the motor mount (2) in the right-hand fuselage shell (11), taking care to orien-
tate it correctly: the opening for the motor leads should be on the underside and
central. Please ensure that you apply adhesive to the full contact area between
the motor mount and the fuselage sides. Immediately wipe off any excess glue
using kitchen paper. Assemble the wing screw support (13) and glue it in place. Glue
the retaining clips (15) in both fuselage shells (11) and (12). Connect the speed con-
troller to the motor and receiver, and check that the motor rotates in the right direc-
tion: clockwise as seen from behind the motor. The two fuselage shells can now be
glued together permanently. Caution: due to the large joint area it is important to
check the fit “dry” (without glue) first. Good ventilation is essential for this stage; work
outdoors if you are not sure. Ensure that glue is applied to all the contact surfaces.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
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The illustration shows the components of the battery compartment cover (14) and the
tailplane (17). Please note that the elevator horn (19) is not glued in place until later.
There are two methods of cutting the elevator free: the normal option is to open up
the slot forward; however, the version shown by the dotted line produces a stronger
tailplane and better damped elevator response. When gluing the reinforcement (18)
in place ensure that no glue gets onto the hinge line. If necessary, the spring power
of the retaining clips (15) can be reduced by opening the jaws slightly.
Here we see the elevator servo prepared for installation; secure the extension lead
connector with a drop of glue. Set the servo to neutral (centre) from the transmitter,
and fit the cut-down output arm (included with the DES 476 BB) as shown.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
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Glue the elevator servo in place as shown, then attach the tailplane (17). Caution:
do not be tempted to use thin cyano to glue the servo, as this will run inside
the case and jam the gears. Important: check the servo function before and
after installing it in the fuselage. Connect the pushrods (20) at both ends, and only
then glue the elevator horn (19) to the elevator.
The rudder servo can be installed in the same way. Run the 500 mm servo extension
lead forward through the fuselage.
The picture shows the fin (21) already glued in place. Take care to position the
bottom edge of the fin exactly flush with the end of the fuselage.
The illustration shows the CFRP stiffener tube (48) fitted to the rudder pushrod (22).
It is installed by cutting the metal pushrod (22) in half, sanding the surfaces, and
gluing both ends in the stiffener tube (48) using cyano. Pull hard on both ends of the
new pushrod to ensure that the glued joints are secure.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
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Note: The CFRP stiffeners (48) are only required for 3-D aerobatics. They can be
fitted at any time if you think they are necessary, even after you have completed the
model.
The undercarriage
The illustration shows the tailwheel assembly components. The first step is to slip the
wire tailwheel unit (28) into the bracket (29), then bend it at the correct angle using a
pair of flat-nose pliers. Push the bush (34) into the tailwheel (31), fit both on the axle
followed by the collet (33) on the outside, then clamp the bush with a grubscrew (32).
Use a balsa knife to cut a slot in the rudder to accept the steering lug (30). Slip the
steering lug (30) onto the steering arm, glue the lug in the slot in the rudder, then
glue the tailwheel bracket (29) to the fuselage. Do not use activator spray for this.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
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Glue the plastic main undercarriage bracket (23) in the fuselage, then assemble the
undercarriage components (24) to (27) as shown in the picture. Note that the wire
undercarriage unit (27) must face forward.
Offer up the two inner wheel leg fairings (38) to check that they fit; you will need to
adjust the angle of the top edge using a balsa knife.
The photo shows the parts of the main wheels and fairings / spats. Glue the prepared
leg fairings (38) to the wire undercarriage unit (27), then slip the collet supports (37)
onto the axles and glue them in place.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
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This shot shows the outer collet support (37) fitted. Check once more that the wheels
are free to rotate, then glue the outer spat shells (39) in place.
The wing
Glue the main spar (41) in the wing (40) to provide the necessary bending strength.
Move the ailerons up and down several times to ease the action of the hinge.
Set the aileron servos to neutral from the transmitter, fit the output arms on them,
then glue the servos in the wing. Connect both ends of the pushrods (22) and glue
the horns (19) to the ailerons. Glue the 180 mm servo extension leads in the wing,
keeping them in a straight line, then glue the spar cover (42) in the slot. Caution: be
sure to apply plenty of glue to the recess in the wing. Glue the wing retainer screw
bush (43) to the wing to complete this aspect of construction. Offer up the wing to the
fuselage and temporarily fit the retaining screw (44).

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
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Installing the receiver and LiPo flight pack
The first step is to connect the servo leads to the receiver; we suggest the following
sequence: speed controller to socket 1, left aileron servo to socket 2, elevator servo
to socket 3, rudder servo to socket 4, right aileron servo to socket 5. It is a good idea
to connect 100 mm extension leads to sockets 2 and 5 permanently, as this makes it
much easier to plug in the aileron servos when you rig the model. Deploy the receiver
aerials to the outside of the fuselage, keeping them at 90°to each other, and fix them
in place with clear tape.
Slide the LiPo flight battery into place as shown, and connect it to the speed con-
troller.
Check all the model’s working systems in turn from the transmitter. Maximum control
surface travels: 30 mm each way for ailerons, 45 mm each way for elevator, 75 mm
each way for rudder, all measured at the inboard or bottom end of the trailing edge.
When you are satisfied, install the spinner and propeller as described earlier.
Decals
If you decide to use the GRAUPNER decals, there is no need to paint the
SOLIDPOR® components. If you opt for the LEKI decal version, you should first paint
the model overall using GRAUPNER LEXACOLOR spray paint, Order No. 945.2, or
spray paint, Order No. 928.2. Do not sand or rub down the SOLIDPOR® surfaces;
simply wipe them with Spannfix (cellulose) thinners before applying the paint. The

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved! No liability for printing errors. Id.-No. 0062205 06/2011
10
panel lines and / or rivet-heads on the fuselage can be picked out with a fine felt-tip
pen if you so wish. Cut out the individual decals and name placards and apply them
to the model, referring to the illustrations on the kit box lid and in the building instruc-
tions. The model is completed by sticking the canopy (45) to the fuselage.
Balancing
To check the Extra’s CG please assemble the model completely, ready to fly, but
with the LiPo battery disconnected. The correct CG position is 80…85 mm aft of the
wing root leading edge. Adjust the battery position as required to balance the
aeroplane correctly. You can check the CG simply by supporting the model under the
wing on two fingertips; it should balance level at the point indicated.
Flying
For the first flight please wait for a day with little or no breeze. The ideal flying site is
a flat, closely-mown grass area without obstructions. Assemble the model com-
pletely, and check that all the control surfaces are at neutral. Allow the model to
take off from the ground, facing directly into any wind. Initially apply minimal
aileron and elevator corrections to keep the model in a steady, straight climb. Fine
adjustments are possible using the trim sliders below and adjacent to the transmitter
sticks. Always land the model flying directly into wind, with the motor idling but not
switched off. Flare out just before touch-down with careful use of up-elevator.
Here at GRAUPNER Modellbau we hope you have many enjoyable flights with your
new LEKI EXTRA 330SC
Replacing the motor
If the motor should ever need to be replaced, it can be removed by pushing it into the
inside of the model. The new motor can be pulled into place from the front using the
motor installation aid (26).