GRAUPNER 9577.MX Instructions Manual

Order No. 9577

9577.MX

Instructions

ULTIMATE

For two-stroke motors up to 20 cc capacity

This model requires a four-channel radio control system

Specification

Wingspan approx. 1400 mm
Fuselage length excl. spinner approx. 1370 mm
Wing area approx. 66 dm²
Tailplane area approx. 12 dm²
Total surface area approx. 78 dm²
All-up weight according to fittings approx. 4100 g
Longitudinal dihedral 0 - 0.5°, top wing
0°, bottom wing
Centre of Gravity approx. 100 - 120 mm aft of the root leading edge

(top wing)

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 model 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.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

1

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 model 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 and fit the
screw.

Safety notes and warnings relating to model aircraft
powered by glowplug motors and petrol engines

• Be sure to read right through the instructions covering assembly and

operation of your model before you attempt to operate it for the first time.

• These safety notes are an integral part of the instructions. Please keep them
and the operating instructions in a safe place. If you ever dispose of the model
be sure to pass them on to the new owner.

• Powered model aircraft are very demanding and potentially dangerous
machines, and call for a high level of technical knowledge and skill from the
operator, together with a responsible attitude.

• Powered model aircraft are not suitable for young persons under 18 years of
age.

• Young people should only be permitted to operate this model under the
instruction and supervision of an adult who is aware of the hazards involved
in this activity.

• The operator of the model must be in full possession of his or her bodily and
mental faculties. As with car driving, operating a model aircraft under the
influence of alcohol or drugs is not permissible under any circumstances.

• Radio-controlled model aircraft may only be employed for the purpose
intended by the manufacturer. They must never be used as man-carrying
machines. We do not permit this model’s use in any way except as a model
aircraft.

• A radio-controlled model aircraft can only work properly and fulfil your
expectations if it is built very carefully and in accordance with the building
instructions. Do not make any modifications of any kind to the design features
or materials. If you wish to avoid injuring people and damaging property it is
essential to be careful and painstaking at all stages of building and operating
your model. Nobody would climb into a full-size aircraft and try to fly it without
completing a course of training first. Model flying is a skill which has to be
learned in just the same way. We suggest that you ask for help from an
experienced model flyer, or join a model club or flight training school. Your
local model shop and the specialist magazines are excellent sources of
information.

• It is fundamentally essential to set the Centre of Gravity (CG) and control
surface travels correctly. Adjust the model until they are exactly correct.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

2

• Radio control system: satisfy yourself that your frequency is vacant before
you switch on. Check your RC system regularly as its components eventually
wear and need to be replaced or repaired. Radio interference caused by
unknown sources can occur at any time without warning. If this should
happen, your model will be uncontrollable and completely unpredictable.
Never leave your radio control system unguarded, as other people might pick
it up and try to use it. Your RC system can only work reliably if the batteries
are kept fully charged.

• Don’t ignore our warnings. They refer to materials and situations which, if
ignored, can result in fatal injury or permanent damage.

• You alone are responsible for the safe operation of your radio-controlled
model and motor.

• If you have any questions regarding the safe operation of your RC model
aircraft, please turn to your local model shop in the first instance as the staff
will be pleased to help you.

• Propellers and other rotating parts which are powered by a motor represent a
permanent hazard and present a real risk of injury. Don’t touch them with any
part of your body. For example, a propeller spinning at high speed can easily
slice off a finger.

• Keep well clear of the rotational plane of the propeller. You never know when
some part may come loose and fly off at high speed, hitting you or anybody
else in the vicinity. Never touch the revolving propeller with any object.

• Take care with loose clothing such as scarves, loose shirts etc. Flapping cloth
can easily be sucked into the area of the propeller and then get tangled in the
blades. This is extremely dangerous.

• If there are passers-by or spectators at your flying site, make sure that they
are aware of the dangers inherent in your activity, and insist that they keep a
safe distance away (at least 5 m).

• Radio-controlled models should only be flown in “normal” weather conditions,
i.e. a temperature range of -5° to +35° C. More extreme temperatures can lead
to changes in battery capacity, material characteristics and other unwanted
effects.

• Model fuels are toxic; do not allow them to come into contact with your eyes
or mouth. Fuel should always be stored in clearly marked containers, out of
the reach of children.

• Never run an internal combustion engine in an enclosed space such as a
cellar, garage etc. Model motors produce lethal carbon monoxide gas just like
full-size engines.

• Motors should only be run in the open air!

• Adhesives and paints contain solvents which may be hazardous to health

under certain circumstances. Read and observe the notes and warnings
supplied by the manufacturer of these materials.

• Model fuels are volatile and highly inflammable. Keep them well away from
open flames, excessive heat, all possible sources of sparks and anything else
which could result in a fire. Do not smoke in the immediate vicinity of fuel or
fuel vapours.

• Model engines generate a lot of heat. The motor and silencer in particular
become very hot when running, and stay at a high temperature for quite a
while. Touching the hot parts can give you serious burns, so take care
especially when carrying out adjustments - wear protective gloves. Hot
engines can even start a fire under certain circumstances.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

3

• When the motor is running it expels hot toxic gases from the exhaust together
with very hot fluid combustion residues which can burn you if you are not
careful.

• Remove all unused fuel from the fueltank and motor after every session.

• Every time you intend to operate your model check carefully that it and

everything attached to it (e.g. propeller, linkages, control surfaces etc.) is in
good condition and undamaged. If you find a fault, do not fly the model until
you have corrected it.

• Model engines are usually started with the help of an electric starter which
should be fitted with the appropriate adaptor where necessary. With fixed­wing models an alternative is to use a “chicken stick” - a length of thick
wooden dowel with a piece of water hose pushed over it.

• Many model motors are very noisy, producing a sound level much higher than
85 dB (A), which implies that you should wear ear defenders. Never run a
motor without the silencer fitted. Even with a silencer, model engines can
easily disturb your neighbours. Don’t run engines when other people expect
peace and quiet.

• If you start your motor when the model is standing on loose or sandy ground,
the propeller will suck up sand and dust and hurl it around, and it could easily
get in your eyes and do damage. Wear protective goggles at such times.

• Take care that the glowplug clip and the glow lead cannot get tangled in the
propeller or other rotating parts. Check the throttle linkage too.

• Take particular care when carrying the model with the motor running. Hold the
rotating parts well away from you!

• Be sure to keep an adequate supply of fuel in the tank. Don’t continue to fly
the model until the tank is drained dry.

• Never fly directly over people.

• Never fly directly towards people.

• Keep a safe distance from residential areas: at least 1.5 km “as the crow flies”.

The best solution is to join a model flying club and use the approved flying
site. Always keep well clear of high-tension overhead cables.

• Whenever you are working on the motor, make sure that you are on a safe
surface and cannot slip. Get used to holding the model really securely.

• Take-off and landing strips should be kept free of unauthorised people and
movable obstacles, particularly when a model is using the strip.

• Watch the aeroplane constantly while it is in the air. Models must always give
way to full-size aircraft.

• Don’t operate your aircraft from public roads, squares, school playgrounds,
public parks or sports grounds etc., and ensure that you are always in full
control of the model.

• It is important that you are able to stop your engine at any time. This is
achieved by adjusting the throttle so that the barrel closes completely when
you move the throttle stick and trim to their end-points. If this does not work,
pinch the fuel feed line between your fingers or pull it off the carburettor.
Never try to stop the motor by grasping the flywheel, propeller or spinner!

• All model flyers should behave in a manner which minimises the danger to
people and property. Never act in any way which will disturb other flyers and
jeopardise safe, orderly flying at the site.

• In legal terms our models are classed as aircraft, and as such are subject to
legal regulations and restrictions which must be observed.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

4

• Our brochure “Luftrecht fuer Modellflieger” (Aviation Law for the Model Flyer)
is available under Order No. 8032, and contains a summary of all these rules.
Your local model shop should have a copy which you can read. There are also
Post Office regulations concerning your radio control system, and these must
be observed at all times. Refer to your RC system instructions for more
details.

• Please don’t misunderstand the purpose of these notes. We only want to make
you aware of the many dangers and hazards which can arise if you lack
knowledge and experience, or work carelessly or irresponsibly. If you take
reasonable care, model flying is a highly creative, instructive, enjoyable and
relaxing pastime.

• This model 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.

Important safety notes

You have acquired a kit which can be assembled into a fully working RC model when
fitted out with suitable accessories. However, we, as manufacturers, have no control
over the way you build and operate your RC model aircraft, nor how you install, operate
and maintain the associated components, and for this reason GRAUPNER are obliged
to deny all liability for loss, damage or costs which are incurred due to the incompetent
or incorrect use and operation of our products, or which are connected with such
operation in any way. Unless otherwise prescribed by binding law, the obligation of the
GRAUPNER company to pay compensation, regardless of the legal argument
employed, is excluded. This includes personal injury, death, damage to buildings,
damage due to loss of business or turnover, interruption of business or other direct or
indirect consequent damage whose root cause was the operation of the model.
The total liability in all cases is limited to the amount of money which you actually paid
for the model.

This model is built and flown at the sole and express responsibility of the
operator. The only way to avoid injury to persons and damage to property is to
handle and operate the model with the greatest care and consideration at all
times.

Before you operate the model for the first time, please check that your private third-party
liability insurance policy covers you for the operation of models of this type. If you are
not sure, take out a special policy designed to cover modelling risks.
These safety notes must be kept in a safe place. If you ever dispose of the model, be
sure to pass them on to the new owner.

Manufacturer’s declaration:

If material defects or manufacturing faults should arise in a product distributed by us in
the Federal Republic of Germany and purchased by a consumer (§ 13 BGB), we,
Graupner GmbH & Co. KG, D-73230 Kirchheim/Teck, Germany, acknowledge the
obligation to correct those defects within the limitations described below.
The consumer is not entitled to exploit this manufacturer’s declaration if the failure in the
usability of the product is due to natural wear, use under competition conditions,
incompetent or improper use (including incorrect installation) or external influences.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

5

The manufacturer’s declaration does not affect the consumer’s legal or contractual rights
regarding defects arising from the purchase contract between the consumer and the
vendor (dealer).

Extent of the guarantee
If a claim is made under guarantee, we undertake at our discretion to repair or replace
the defective goods. We will not consider supplementary claims, especially for
reimbursement of costs relating to the defect (e.g. installation / removal costs) and
compensation for consequent damages unless they are allowed by statute. This does
not affect claims based on legal regulations, especially according to product liability law.

Guarantee requirements
The purchaser is required to make the guarantee claim in writing, and must enclose
original proof of purchase (e.g. invoice, receipt, delivery note) and this guarantee card.
He must send the defective goods to us at his own cost, using the address stated above.
The purchaser should state the material defect or manufacturing fault, or the symptoms
of the fault, in as accurate a manner as possible, so that we can check if our guarantee
obligation is applicable.
The goods are transported from the consumer to us and from us to the consumer at the
risk of the consumer.

Duration of validity
This declaration only applies to claims made to us during the claim period as stated in
this declaration. The claim period is 24 months from the date of purchase of the product
by the consumer from a dealer in the Federal Republic of Germany (date of purchase). If
a defect arises after the end of the claim period, or if the evidence or documents
required according to this declaration in order to make the claim valid are not presented
until after this period, then the consumer forfeits any rights or claims from this
declaration.

Limitation by lapse of time
If we do not acknowledge the validity of a claim based on this declaration within the
claim period, all claims based on this declaration are barred by the statute of limitations
after six months from the time of implementation; however, this cannot occur before the
end of the claim period.

Applicable law
This declaration, and the claims, rights and obligations arising from it, are based
exclusively on the pertinent German Law, without the norms of international private law,
and excluding UN retail law.

The following points are important and must be observed at all times:

• Before you fly the model, check that the radio control system is working reliably, and

that all connections are secure.

• If you prefer to use dry batteries as power supplies, please note that they must never

be recharged. Only batteries marked specifically as “rechargeable” can safely be
recharged.

• The batteries must be charged and the range of the radio control system must be

checked before you operate the model. In particular, the radio control system
batteries must be fully charged before each session and checked before every flight.

• Ensure that the channel you intend to use is not already in use by other modellers.

Never fly the model if you are not certain that your channel is free.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

6

• Read and observe the instructions and recommendations provided by the

manufacturer of your radio control system and accessory components.

• Ensure that the servos are not mechanically obstructed at any point in their travel.

• Dry cells and rechargeable batteries must never be short-circuited.

• Remove all batteries from the model prior to transporting and storing it.

• Do not subject the model to dirty or cold conditions, or high levels of humidity or heat.

• Secure the model and your RC equipment carefully when transporting them. They

may be seriously damaged if they are free to slide about.

Pre-flight checks
Check that the radio control system is working correctly and at full range before every
flight: fit the transmitter aerial and extend it fully, then switch on the transmitter and the
receiving system. Walk away from the model, and check that all the control surfaces
work smoothly and immediately at an appropriate distance, and deflect in the correct
“sense” (direction) relative to the stick movements.
Repeat the check with the engine running while a friend holds the model securely for
you.
If you are a relative beginner to model flying, we recommend that you enlist the aid of an
experienced model pilot to help you check and test-fly the model.

Care and maintenance

• Clean the model carefully after every flight, and remove any dirt from the propeller.

Clean the aeroplane and the RC components using suitable cleaning agents only.
Ask your model shop for information if you are not sure.

• If the model is not to be operated for a considerable time, it is important to clean and

re-lubricate all the moving parts.

Notes on completing the model

• Before building the model it is important that you read the instructions right through to

the end. Tools can be dangerous; please be aware of the hazards involved in using
them.

• Use cable of adequate cross-section, capable of carrying the currents which will flow

when the model is flying.

• Before making any glued joints, be sure to clean the surfaces and remove all traces

of grease. We recommend sanding lightly, or wiping with a non-greasy cleaning
agent. The same applies to surfaces to be painted, otherwise the paint is unlikely to
adhere well. Before gluing parts to the fuselage it is essential to roughen the surfaces
with fine abrasive paper and de-grease them with acetone or similar solvent,
otherwise you will not obtain strong, durable joints. This applies in particular to
moulded GRP fuselages.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

7

Additional items required

Motor and accessories

Motor
Order No.
OS MAX 91 FX

1816

OS MAX 91 SX
ACRO SPORT

Capacity
cc

Silencer
Order No.

Spacer
Order No.

Propeller
Order No.

14.95 1895.72 - 38 x 20 cm

1318.38.20

14.95 1895.72 - 40 x 20 cm

1318.40.20

Glowplug
Order No.

1682

1682

1932

OS MAX 120 AX

2703

20.0 2703.33 2703.36 38 x 25 cm

1318.38.25

1682

Radio control system

For this model you require at least a four-channel RC system with six servos. The
transmitter should also feature a servo reverse facility.

We particularly recommend mx-12 to mc-24 computer systems. The model is designed
for standard-size servos. We recommend the following receiver battery: GM POWER
PACK, Order No. 2490.4; the pack should be properly maintained before and after each
flying session. Please remember that the battery needs to be cycled (charged and
discharged) several times before it reaches full rated capacity.

For connecting the aileron servos to the receiver you will need a folding ferrite ring,
Order No. 98516, together with two extension leads, Order No. 3935.11.
The two aileron servo leads should be extended using extension leads, Order No.

3935.18.

Foam padding for the receiver and receiver battery are included in the kit.

Adhesives

Fast-setting epoxy resin, e.g. UHU plus schnellfest, Order No. 962
Slow-setting epoxy resin, e.g. UHU plus endfest, Order No. 950
White glue, e.g. UHU coll, Order No. 958.60
UHU hart cellulose cement, e.g. Order No. 534
Cyano-acrylate glue (“cyano”), e.g. Order No. 5821
Thread-lock fluid, e.g. Order No. 952

Accessories for flying the model (not included)
Synthetic oil based glow fuel, to suit motor
Fuel filter, e.g. Order No. 1650.1
Fuel tubing, e.g. Order No. 1643
Manual fuel pump, e.g. Order No. 1610 or 6870
Glowplug energiser battery and clip, e.g. Order No. 3248
Electric starter, e.g. Order No. 1628
Starter battery, e.g. Order No. 2592

Tools required (not included)
Various (cross-point) screwdrivers, pointed-nose pliers, flat-nose pliers, side-cutters,
balsa knife or razor blade, set of twist drills, universal glowplug spanner, pencil, felt-tip
pen, fine-tip soldering iron.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

8

Assembling the ULTIMATE
Do not start assembling the model until you have examined the kit components and are
familiar with all the stages of construction. If you are not satisfied with any part, take it
back to the model shop where you purchased the kit before you start work on it.

Use your fingertips to locate the slots in the fuselage for the tailplane, fin and cabane
struts, and melt away the film over them using the tip of a hot soldering iron. Repeat the
procedure with the holes in the bottom wing panels for the retaining screws.

Slide the tailplane and fin into the slots in the fuselage, and position them accurately: the
tailplane must be at right-angles to the fuselage centreline, and project by equal
amounts on both sides. Cut a slot in the fuselage tail post to accept the bottom rudder
hinge.

Mark the outline of the fuselage on the tailplane and fin.

Withdraw the tail panels, and remove the covering film from the panels just inside the
marked lines, again using a hot soldering iron to melt the film: run the tip of the iron
along a steel straight edge before peeling the film away from the wood.

Glue the tailplane and fin in the slots in the fuselage. Align them carefully as already
described, and pin them in place to prevent them shifting while the glue dries.
Prepare the wheel spats as shown in the left-hand photo; note that you need one left
and one right spat (i.e. a handed pair).

Fix the wheel spats and the wheel axles to the undercarriage units.
The undercarriage units can now be fixed to the fuselage. Align the wheel spats
carefully, and apply UHU schraubensicher (thread-lock fluid) to the nuts to prevent them
working loose.

Pilot-holes have to be drilled in the underside of the fuselage for the screws which retain
the tailwheel unit. Attach the unit to the fuselage with the pivot point of the tailwheel shaft
exactly in line with the rudder pivot axis.

Fit the wire tailwheel leg through the hole in the plastic driver, then screw the tailwheel
unit to the fuselage; ensure that it is exactly parallel to the fuselage centreline. At this
point the horns can be screwed to the rudder and the two elevators. It is important that
the clevis connection hole in the horns lines up exactly with the hinge pivot axis of the
control surfaces.

The rudder horns are attached to the rudder using M2 x 29 mm screws and nuts, while
the elevator horns are secured with M2 x 20 screws and spreader plates. The line of the
pushrods dictates the exact position of the horns.

Fit the rubber grommets in the mounting lugs of the rudder and elevator servos, then
press the metal spacers into them from the underside, as shown in the photo. Place the
servos in the servo plate and drill 1.5 mm Ø pilot-holes through the mounting lugs. Cut
down the servo output arms as shown in the photo, and fit them on the appropriate
servos.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

9

10

The rudder servo and the two elevator servos can now be installed permanently in the
fuselage. Connect the two rudder cables to the servo output lever as shown in the photo.
Set the rudder to centre, and the rudder servo to neutral (centre) from the transmitter.

Mark the length of the two elevator pushrods, and bend them at right-angles at the
marked point using a pair of flat-nose pliers. Cut off the excess rod length, leaving about

1.5 mm projecting beyond the retaining clip.

Cut an opening in the right-hand fuselage side for the ON / OFF switch, and install the
switch using the screws supplied with it.
Locate the hole in the throttle servo output arm which is 11 mm from the centre, and drill
it out to 2 mm Ø. Mount the swivel pushrod connector in the hole, tightening the nut just
to the point where the barrel rotates smoothly, but without noticeable slop.

Installing the glowplug motor

Position the glow motor on the two motor mount arms in such a way that the distance
between the rear face of the motor mounts and the front face of the propeller driver is
about 126 mm.

Attach the motor mount assembly to the nose bulkhead in such a way that the centreline
of the motor is about 6 mm above the marked point on the nose bulkhead when viewed
from the side.
Fix the motor mount to the bulkhead using the screws and captive nuts supplied. Secure
the screws with thread-lock fluid to prevent them shaking loose. The upper motor mount
arm has to be shortened as shown in the photos.

The glow motor must be removed from the motor mount again in order to connect the
throttle pushrod. Connect the pre-formed end of the throttle pushrod to the carburettor
throttle arm, then slip the pushrod into the guide tube whilst fixing the motor on the
mount again. Thread the pushrod through the cross-hole in the swivel pushrod
connector fitted to the throttle servo.

Attach the silencer to the motor using the specified spacer if necessary. If you think the
silencer hangs too low, you can cut a piece about 10 mm long from the spacer, and file
the cut face flat.

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 the straight tube 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. Rotate the unused plastic tubes so that one faces down (later the
filler line) and the other faces up (vent line; this is the overflow when you are filling the
tank). Extend these two tubes with silicone fuel tubing so that they reach the top and
bottom of the tank respectively. This ensures on the one hand that the tank can be filled
completely, and on the other that it can be drained completely after the flight. 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.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

11

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 tank in the fuselage through the bottom wing saddle, and thread the fuel tubes
through the hole in the nose bulkhead. Note that the overflow pipe must be at the top of
the tank. Secure the fueltank with the rubber band supplied.
Connect the fuel line from the clunk pick-up to the carburettor nipple. Route the overflow
tube down and out of the cowl. The fuel line for filling the tank can be routed out of a
hole in the side of the cowl.

Cut and file away the cowl to clear the silencer, the cylinder head, the needle valve etc.

The cowl is attached to the fuselage using two screws on each side. Inject a little UHU
coll (white glue) into the holes before you fit the four cowl retaining screws; this prevents
them working loose.

The bottom wing

Extend the aileron servo leads using 180 mm extension leads, and secure each
connection with a piece of heat-shrink sleeve or similar. The servos are screwed to the
servo mounts as shown in the photo.

The servo leads can now be drawn through the wing panels and out of the holes close to
the root ribs using the thread inside the wings. Fix the aileron servos to the mounts in
the wing panels after drilling pilot-holes for the retaining screws.

Mark the position of the horns on the ailerons using a setsquare for correct alignment.

Attach the ailerons to the horns as shown in the next set of photos. Ensure that the pivot
point of the ailerons lines up correctly with the linkage holes in the horns.

Cut off excess screw length using side-cutters, and file the cut ends flush with the
spreader plates.

Screw an M2 nut and a clevis on each aileron pushrod. Connect the clevis to the aileron
horn. Set the servo to centre, hold the aileron at neutral, and mark the point where the
pushrod crosses the servo output arm.

Bend the pushrod at right-angles at the marked point, and cut it to length as described
for the elevator servos. Secure the pushrod in the servo output arm using a plastic
retaining clip. Repeat the procedure with the other aileron.

Cut out the cabane strut fairings, working along the marked lines, and slip them over the
cabane struts.
Insert the cabane struts in the appropriate slots in the fuselage and fit the retaining
screws. Secure the screws with UHU thread-lock fluid to prevent them working loose.

Join the top wing panels using the aluminium joiner tube supplied, then screw the top
wing to the cabane struts.

Attach the diagonal struts to the front and rear cabane struts using screws and nuts.
Glue the cabane strut fairings in place using UHU Alleskleber Kraft (clear cement).

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

12

Fit the two bottom wing panels on the aluminium joiner tube, insert the root leading edge
tongues in the slot in the fuselage former, and fix the wing to the fuselage using the
plastic screws supplied.
The two wing struts can now be screwed to the brackets in the wings.
The holes in the struts must first be opened up to 7 mm Ø in order to accept the plastic
nuts.
Attach the two wing struts to the wing brackets using the plastic screws supplied. Mark
the correct length of the plastic screws and shorten them so that they end flush with the
outside of the plastic nuts.

Assembling the ULTIMATE
We recommend that you connect two 100 mm extension leads to receiver output
sockets 2 and 5, to make it easier to connect the aileron servos when rigging the model.
Fit the wing panels on the aluminium joiner tubes. Connect the aileron servos to the
extension leads, and screw the bottom wing to the underside of the fuselage as already
described. Fix the top wing to the cabane. Tighten the screws just to the point where the
wings are firmly fixed to the fuselage, and cannot shift. Don’t over-tighten them!
The top ailerons are driven by the bottom ailerons by means of link pushrods. Glue the
link rod horns to the ailerons as shown in the photo, after removing the covering film
over an area slightly smaller than the horn base.
Glue the horns to the ailerons, keeping them parallel to their longitudinal axis.

The link pushrods are based on CFRP rods, and are assembled as shown in the photo.
Connect the top and bottom ailerons using the link pushrods.

Balancing the ULTIMATE

Assemble the model completely, with the fueltank empty, and support it on both sides of
the fuselage at a point about 100 - 120 mm aft of the root leading edge of the top wing. If
the Centre of Gravity is correct, the model will hang level, with the nose inclined slightly
down. If necessary, fit lead ballast to nose or tail until the model balances correctly.
Before the first flight it is essential to set all control surfaces exactly to centre (neutral)
when the transmitter trims are also at centre.

Control surface travels for normal flying
Ailerons 20 mm up, 20 mm down
Elevators 30 mm up, 30 mm down
Rudder 30 mm right, 30 mm left

We recommend that you set 30% Exponential on all control surfaces at the transmitter.

Important:

When fitting and adjusting the various linkages you should ensure that they move freely,
without binding, are able to move to their full extent - including trim travel - and are not
obstructed mechanically at any point.
When you move the rudder stick to the right, the rudder should also deflect to the right
(left stick: left rudder). Pull the elevator stick back towards you, and both elevators must
deflect up (stick forward: elevators down).
If you move the aileron stick to the right, the right ailerons should rise, the left ailerons
fall. When you move the throttle stick forward, the motor should run to the full-throttle
position, i.e. the carburettor barrel should be fully open. Move the throttle stick and trim

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007

13

fully back (towards you), and the motor should stop reliably.
We wish you every success and many enjoyable flights with your ULTIMATE.

Yours - the Graupner team

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY

No liability for printing errors. We reserve the right to introduce modifications. 02/2007