GRAUPNER piper cherokee 9589 User manual

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
1
Order No. 9589
Instructions
PIPER CHEROKEE
For four-stroke internal-combustion engines up to about 30 cc
and
two-stroke petrol engines up to about 26 cc capacity
This model requires a six-function radio control system

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
2
Specification
Wingspan approx. 2200 mm
Fuselage length excl. spinner approx. 1700 mm
Wing area approx. 75 dm²
Tailplane area approx. 6 dm²
Total surface area approx. 81 dm²
All-up weight according to fittings approx. 7200 g
Longitudinal dihedral 0-0.5 Grad
Centre of Gravity approx. 95 - 100 mm behind root leading edge
Caution: this model is not a toy!
If you are a beginner to this type of powered model, please ask an experienced
model flyer for help and support. If you attempt to operate the aeroplane without
knowing what you are doing, you could easily injure yourself or somebody else.
Please keep your safety and well-being in mind at all times.
Important: before you start construction
Even if you have already built a large number of RC models please read right through
these instructions and check that all the kit components are actually present. We
have taken great trouble to keep construction as simple as possible, without making
any compromises in the area of safety.
Note regarding the film covering
Minor creases or bubbles may develop in the film covering due to major fluctuations
in weather conditions (temperature, humidity etc.); in rare cases you may even find a
slight warp in a component. These minor faults are in the nature of film-covered built-
up wooden structures, and can easily be corrected using a heat gun, as commonly
used for modelling.
Creases: Blow warm air over the area and rub down with a soft cloth.
Wing warp: Hold the panel twisted gently in the opposite direction to the warp,
and apply warm air to remove the creases from the covering.
Caution! do not heat the film more than is absolutely necessary. If the air or the iron
is too hot, the film may melt and holes may be formed.
This aeroplane is highly pre-fabricated and can be built in a very short time. However,
the work which you have to carry out is important and must be done carefully. The
model will only be strong and fly well if you complete your tasks competently - so
please work slowly and accurately.
When self-tapping screws have to be screwed into wood, apply a little white
glue to prevent them shaking loose: just squirt white glue into the hole before
fitting the screw.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
3
Notes on building the model
•Before you start building the aircraft it is essential to study the plan and read right
through the instructions. Please bear in mind the dangers inherent in the handling
of tools.
•When preparing wiring, be sure to use cable capable of carrying the currents like-
ly to flow when the model is flying.
•Deploy the receiver aerial as far away as possible from high-current cables (at
least 3 cm).
•Remove all traces of grease from the joint surfaces of components which are to
be glued. A good method is to sand lightly before wiping with a non-greasy liquid
detergent solution. The same applies to surfaces which are to be painted, other-
wise the paint will not adhere permanently. Before gluing any GRP parts, and
GRP fuselages in particular, the joint surfaces must be sanded thoroughly with
fine-grit abrasive paper before de-greasing with a solvent such as acetone. This
is the only method of obtaining durable glued joints involving GRP parts.
Additional items required
Motor
Order No.
Capacity
cc
Silencer
Order No.
Propeller
Order No.
OS MAX FT 160
1412
2 x 13.26 2x1839.33 1318.40.20
G 26 petrol engine
1903
26 1903.34 1318.40.25
OS MAX FS-200S
2728
32.4 2728.33 1318.45.20
Radio control system
The RC system must feature at least five control functions and ten servos. The
transmitter should also include a servo reverse facility.
We particularly recommend MC-22s to MC-24 computer systems. The model is de-
signed for standard-sized servos.
We recommend the following receiver power supply: two GRAUPNER 5N-5000
NiMH packs, Order No.98903.5, or two LiIo-Nano A 123 packs, Order No. 7682.2,
which need to be maintained carefully before and after each flying session. Please
note that batteries of this type do not reach full capacity until they have been charged
and discharged (cycled) several times.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
4
As ON / OFF switch for the receiving system we strongly recommend the use of the
PRX, Order No. 4136.
You will need four suppressor filters, Order No. 1040, or a folding ferrite ring, Order
No. 98516.1 and four extension leads, Order No. 3935.18, in order to connect the
two aileron servos and two landing flap servos to the receiver, i.e. these leads are
plugged into the receiver permanently.
The following servo leads are required: one extension lead, Order No. 3935.65, for
each aileron servo, and one extension lead, Order No. 3935.32 for each landing flap
servo. The receiver and receiver batteries should be packed in soft foam for shock
protection.
The model requires standard-sized servos with an output torque of around 50 Ncm.
Adhesives
Fast-setting epoxy, e.g. UHU plus schnellfest, Order No. 962
Slow-setting epoxy, e.g. UHU plus endfest 300, Order No. 950.43
Wood glue, e.g. UHU Holzleim express, Order No. 958.60
UHU hart, e.g. Order No. 534.35
Cyano-acrylate, e.g. Order No. 5821
Cyano-acrylate, e.g. Order No. 5822
Thread-lock fluid, e.g. Order No. 952
Items required for flying the model (not included)
Fuel based on synthetic oil, to suit engine
Fuel filter, e.g. Order No. 1650.1
Fuel tubing, e.g. Order No. 1643 for glowplug engines
Fuel tubing, e.g. Order No. 1325.2 for petrol engines
Aerobatic fueltank, e.g. Order No. 136
Fueltank plugs, Order No. 133
Manual fuelpump, e.g. Order No. 1610 or 6870
Glowplug energizer battery with plug clip, e.g. Order No. 3247
Electric starter, e.g. Order No. 1628
Starter battery, e.g. Order No. 2592
Tools required (not included)
Set of cross-point screwdrivers, pointed-nose pliers, flat-nose pliers, side-cutters,
balsa knife or razor blade, set of twist drills, pencil, felt-tip pen, fine-tip soldering iron.
Assembling the PIPER CHEROKEE
Wing and undercarriage
Please don’t start assembling the model until you have checked the kit components
and the building instructions, and are familiar with the construction procedure. If you
are not happy with any component, kindly return it to your model shop without delay.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
5
Mark a centreline on all the aileron hinges using a pencil, as shown in the photo.
The hinges can now be inserted in the ailerons as far as the pencil lines, and glued in
place. We recommend thick cyano for this: push the hinges into the slots to a depth
of about 1 mm, apply cyano on both sides, then push them in as far as the marked
lines.
Use your fingertips to locate the holes in the ailerons for the horns, and melt the film
over them using the tip of a hot soldering iron.
When the glue has set hard, insert the projecting hinges into the slots in the wings to
check alignment; you may need to adjust the slots in the wings slightly.
Now repeat the above procedure: push the hinges into the wing to a depth of about 1
mm, apply cyano on both sides, then push the ailerons into place, leaving a gap
about 0.5 mm wide at the hinge line.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
6
Lengthen the aileron servo leads with the appropriate extension leads, and fit a piece
of heat-shrink sleeve round each connection to prevent it working loose; a drop of
cyano also works well. Set the servos to centre from the transmitter, and fit the output
arms on the output shafts.
Set the servos to centre by connecting them to the receiving system. The wing-
mounted servos can now be attached to the support blocks using the retaining
screws supplied with them: the first step is to push the rubber grommets into the
servo mounting lugs, followed by the brass tubular spacers, with the flange on the
underside. The spacers are easier to fit if you slip them on a suitable screwdriver first.
Drill 1.5 mm Ø pilot-holes in the support blocks, using the metal spacers as a guide,
then fit the servo retaining screws as shown.
The servo leads can now be pulled through the wing panels using a length of thread:
tie the thread to the servo lead just behind the connector, then pull it through until it
appears at the root rib.
Run the servo leads out of both wing panels through the holes adjacent to the root
ribs, then temporarily fit cable ties on them to prevent them slipping back inside.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
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Fit short pieces of heat-shrink sleeve over the landing flap hinges to prevent the jaws
opening.
On the underside of the wing you will find marked points indicating the position of the
flap hinges; note that the pivot axis of all the hinges must be exactly the same dis-
tance from the wing trailing edge. Temporarily fix the hinges to the wing with one
screw, as shown in the left-hand photo, then set the hinge assembly exactly at right-
angles to the wing trailing edge using an engineer’s square or setsquare before fitting
the remaining two screws to secure the hinge to the wing. Now offer up the landing
flaps to the wings and tape them in place temporarily. Fit the retaining screws to fix
the hinges to the flaps.
On one aileron remove a disc of covering film the same size as the base of the ai-
leron horn socket. Assemble the threaded socket, the cheesehead screw, the horn
lug and the nut as shown in the photo. Repeat for the second aileron.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
8
Insert the horns in the holes in the ailerons and set them to the correct height (see
photo). The horns can now be glued in the holes in the ailerons. These joints must be
strong, and we recommend the use of thickened 24-hour epoxy for durability.
The aileron and landing flap pushrods are assembled as shown in the following se-
quence of photos.
Set the servo and each control surface to neutral, then adjust the length of the push-
rod and apply a drop of UHU thread-lock fluid to prevent it moving out of adjustment.
The next step is to locate the undercarriage channels in the wings using your finger-
tips. Remove the film over the channels using the tip of a hot soldering iron.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
9
Now insert the undercarriage leg in the channel prior to marking the position of the
two saddle clamps. Place the clamps and the undercarriage fairing on the wing as
shown in the photo.
Drill pilot-holes in the wings to suit the retaining screws, then screw the clamps and
the wheel fairing support block to the wing.
You will need to file away the inside of the two wheel fairings to provide clearance for
the wire undercarriage units. Note that the convex side of the wheel fairings must
face outwards. The wheels can now be attached to the axles using collets and grub-
screws. Apply UHU thread-lock fluid to the grubscrews to prevent them working
loose.
The wheels and wheel fairings must be aligned exactly parallel with the fuselage cen-
treline.
Use your fingertips to locate the holes for the wing retainer screws in the wing root
area, and remove the covering film over them using the tip of a hot soldering iron.
The final stage on the wings is to glue the GRP wingtips to the tip ribs using UHU
Holzleim express, Order No. 958.60. Tape the tips in place as shown in the photo, to
prevent them shifting while the glue is hardening.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 06/2010
10
Fuselage, tailplane, fin and noseleg
The covering film has to be removed from the mating surfaces of the fuselage and fin
before the fin can be glued in place, as shown in the photos.
Use a felt-tip pen to mark the outline of the fuselage on the tailplane, then run a hot
soldering iron just inside the marked line before peeling off the unwanted film.
Apply UHU Holzleim express, Order No. 958.60, to the tailplane saddle, place the
tailplane in position, and press it firmly into place. Check that the tailplane is ‘square’
to the fuselage in all three axes, then pin or weight it down to prevent it shifting while
the glue hardens.