GRAUPNER AMIGO IV User manual

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 05/2013
1
Order No. 9546
Assembly Instructions
AMIGO IV
ARTF RC model aircraft
Wingspan approx. 2000 mm
This model requires a two-function HoTT COMPUTER SYSTEM

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
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Please be sure to observe the safety notes included in the Appendix to these assembly instruc-
tions. If you ever dispose of the model, the complete assembly instructions and safety notes
must also be passed on to the new owner.
Introduction
The AMIGO IV is a classic Graupner/SJ model aircraft which offers an exceptional
performance in the air. The timelessly elegant AMIGO first appeared on the market in
the year 1960. In glider form the model can be launched by hand-tow or bungee, but
it can also be flown as a powered glider with a motor pylon.
It is essential to read right through these assembly instructions before you fly the
model, and to make sure you are familiar with the method of operating your HoTT
COMPUTER SYSTEM.
Pack contents
1. Fuselage with control surface linkages
2. Canopy
3. Left-hand wing panel
4. Right-hand wing panel
5. Tailplane
6. Fin
7. Steel rod wing joiner, 4.5 Ø x 155 mm
8. Pack of small hardware items
9. AMIGO IV decal sheet
10.Assembly instructions in German, English and French
Please take the time to examine the components and accessories before you start
assembling the model. If you are not satisfied with any part, or if anything is missing
from the kit, kindly inform your dealer before you start construction.
Essential accessories for the glider version (not included)
Graupner MX-10 HoTT computer system Order No. 33110
DES 577 BB servo (2 required) Order No. 7944
4N-1600 NiMH receiver battery Order No. 8716.4
Switch harness with charge socket Order No. 3934.3
ULTRAMAT 8 battery charger Order No. 6411
Receiver battery charge lead Order No. 3021
Trim ballast Order No. 536
Essential accessories for the electric version (not included)
Graupner MX-10 HoTT computer system Order No. 33110
DES 577 BB servo (2 required) Order No. 7944
COMPACT CONTROL 45 BEC speed controller Order No. 7224
20C 2/2500 7.4 V 20C LiPo battery, G 3.5 Order No. 7633.2
ULTRAMAT 8 battery charger Order No. 6411
G 3.5 charge lead Order No. 2970.L
Motor pylon Order No. 2910
COMPACT 260 Z electric motor Order No. 7731
E-PROP 8 x 5” propeller Order No. 1326.8x5
Precision spinner, 38 mm Ø Order No. 1385.383
Trim ballast Order No. 536

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Adhesives (not included)
Cyano-acrylate (“cyano”) Order No. 5821
Cyano-acrylate activator Order No. 953.150
UHU-ALLESKLEBER Kraft Order No. 1096
Essential tools (not included)
Ruler, scissors, flat-nose pliers, balsa knife, side-cutters, set of twist drills, 2.0 mm
A/F allen key, screwdriver, film heat-gun or Profi Iron, Order No. 1226. Required for
electric version with motor pylon only: soldering iron.
Assembling the model
The model can be completed ready for the air in just a few hours. Nevertheless it is
important to observe the following instructions accurately, as this will ensure that the
first flight will be a complete success.
The fuselage, with fin and tailplane
Insert the fin in the slot, lay a ruler on the wing saddle, then sight along the fuselage
from the nose to check that the fin is exactly vertical. Apply cyano along the joint
lines; this adhesive penetrates well into the joints.
When the glue has set hard, remove the rudder and glue the hinges in the slots
using UHU-ALLES-KLEBER Kraft. Please take care to apply the glue sparingly,
otherwise the excess may run into the hinge line and jam the rudder. There should
be an even gap about 0.5 mm wide between fin and rudder.
Prepare the rudder and elevator servos by pressing the rubber grommets and metal
spacer sleeves into the mounting lugs; these parts are supplied with the servos.
The photo shows the prepared elevator servo, with the spacer sleeves fitted from the
underside. Snip off the unwanted output arms using side-cutters, and drill out the lin-
kage hole in the remaining output arm to 1.9 mm Ø.
Switch the RC system on, and check that the servos are at centre before fitting the
output arms. Place the servos in the fuselage and secure each with four self-tapping
screws; these are also supplied with the servos.
The tailplane can now be attached to the fuselage using the two allen-head screws
and washers supplied in the hardware pack. Tighten the screws using a 2.0 mm A/F
allen key, but only to the point where the tailplane cannot shift.
Connect the clevises to the rudder and elevator horns before screwing the horns to
the control surfaces. Please note that the two horns are not identical.
You may need to bend the pushrods slightly at the tail end to ensure that they move
smoothly through the exit slots in the fuselage. Mark the position of the horn holes
on the rudder and elevator, and drill 1.9 mm Ø holes at the marked points. Fix the

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horns to the control surfaces using two pan-head screws and one plastic spreader
plate each.
The picture shows the tailplane screwed to the fuselage, and the horns attached to
the rudder and elevator. Snip off excess screw length using side-cutters. Caution:
protect your eyes with goggles to avoid injury.
The illustration shows the rudder pushrod connected to the servo and secured with a
plastic keeper. Set each servo and each control surface to centre, then bend the
pushrod at right-angles at the linkage hole position. Snip off excess pushrod length,
so that about 1 mm projects above the plastic keeper.
Screw the towhook to the underside of the fuselage using the pilot-holes already
drilled. The towhook is not required if you only intend to fly the model at the slope or
under electric power.
Cut out the canopy, then attach it using UHU ALLESKLEBER Kraft. Tape the moul-
ding in place while the glue is hardening.
The wing
Fit the two wing panels together using the steel rod joiner. The wing is held on the
fuselage using rubber bands stretched between the two aluminium dowels which
should now be fitted through the holes in the fuselage; check that they project by an
equal amount on both sides before securing each with a few drops of cyano.
RC installation: glider version
Connect the servo leads to the receiver as follows: socket 1: switch harness, with
receiver battery connected; socket 2: rudder servo; socket 3: elevator servo. Refer to
the graphic label on the receiver to ensure that the connectors are the right way

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
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round: the brown wire should always be at the top of the receiver. The receiver and
receiver battery should be packed in soft foam in the fuselage to avoid damage.
The photo above shows the arrangement of the RC system components in the fuse-
lage. The fuselage is shown in cutaway form for clarity.
The AMIGO IV with motor pylon
The AMIGO IV can also be fitted with the motor pylon, Order No. 2910, if you wish to
fly the model from a flat field site without using a bungee system (the motor pylon is
not included in the pack).
The picture shows the RC system installation for the electric-powered version. The
fuselage is shown in cutaway form for clarity.
Please note that the receiving system is switched on when you connect the G
3.5 plugs and sockets between the speed controller and the LiPo battery. From
this moment it is possible that the motor connected to the system could sud-
denly burst into life at full power if something unexpected were to occur. For
safety reasons the propeller should not be fitted to the motor until you have
completed the installation and checked the working system. Always carry out
the initial test-runs without the propeller fitted. It is essential to disconnect the
G 3.5 plugs and sockets after every motor run or flight, as this avoids
premature battery damage as well as promoting safety. Even when the model is
not in use, a small current always flows when the G 3.5 plugs and sockets are

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 05/2013
6
connected. In the long-term this could deep-discharge the LiPo battery,
causing irreparable damage.
Fit the motor pylon on the steel joiner between the two wing panels, push the wings
firmly together, and fix the assembly to the fuselage using four rubber bands.
The illustration shows the electric-powered version of the AMIGO IV with the motor
pylon fitted.
Decal sheet
Before the decals are applied the covering film should be smoothed out using a film
iron or heat-gun. Note: fluctuations in humidity and temperature may cause creases
and slack areas in the covering film, but these can be removed using the tools
mentioned above. Cut out the individual decals and apply them to the model in the
arrangement shown in the kit box illustration.
Balancing
Assemble the model completely for balancing, i.e. with the whole RC system fitted.
The correct Centre of Gravity is at a point 115 mm from the wing leading edge,
measured at the root.
Check the C.G. by supporting the model under the wing on two fingertips at the point
indicated: the model should now balance level. Add trim ballast (Order No. 536, not

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors. 05/2013
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included) to the extreme fuselage nose until the model remains horizontal. Note: the
C.G. of the AMIGO IV is further aft than normal due to the tailplane’s lifting airfoil.
Control surface travels
The control surface travels should be as follows, in each case measured at the
trailing edge: elevator approx. 12 mm up and down, rudder approx. 40 mm to both
sides of centre. The two-position Dual Rate switch on the MX-10 transmitter can be
used to reduce the rudder and elevator travels by about 30%; move the switch back
towards you for reduced travels. We recommend reduced travels for the first few
flights.
Flying
Assemble the model completely, charge all the batteries, and check that the control
surfaces are properly centred before undertaking the first flight. Wait for a day with
little or no breeze. A good flying site is a flat grassy field, ideally with a gentle slope
facing into wind.
Note: for the initial test-glide push the model forward directly into any wind; the
fuselage nose should be angled down slightly (by about 10°). If necessary apply
very slight rudder and elevator commands to keep the model gliding straight and flat.
Fine-tuning is carried out using the trim sliders below and adjacent to the transmitter
sticks. Always land the model directly into wind.
All of us at Graupner/SJ hope you enjoy many fine flights with your new
AMIGO IV
Specification - AMIGO IV
Wingspan approx. 2000 mm
Overall length approx. 1115 mm
Wing section NACA 4409
Wing area approx. 37.5 dm²
Tailplane area approx. 7.5 dm²
Total surface area approx. 45.0 dm²
All-up weight approx. 1100 g
Replacement parts (not included)
AMIGO IV canopy Order No. 9546.1
AMIGO IV fuselage Order No. 9546.2
AMIGO IV wing panels Order No. 9546.3
AMIGO IV tailplane and fin Order No. 9546.4
AMIGO IV decal sheet Order No. 9546.14
Rubber bands, 65 mm Ø Order No. 50.65

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Safety notes
Caution: cyano-acrylate adhesive must never be allowed to contact any part of your body, and your eyes
in particular. For this reason we recommend the use of gloves and goggles when handling these
materials. The workshop should be effectively ventilated. Store the adhesive out of the reach of children.
It is a legal requirement to obtain third-party insurance before you operate any model aircraft.
Before attempting to operate the model for the first time it is essential to read right through the assembly
and operating instructions attentively. You alone are responsible for the safe operation of your RC model
aircraft. Young persons must be supervised by a responsible adult who is aware of the possible hazards
involved in the operation of model aeroplanes.
In legal terms our models are classed as aircraft, and as such are subject to legal regulations and
restrictions which must be observed at all times.
Avoid short-circuits at all times. The high energy density of the batteries used in modelling involves a
constant risk of explosion and fire.
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. Cautious and carefully considered action is
essential in order to avoid personal injury and / or property damage. Nobody would climb into a full-size
sailplane and try to fly it without first completing a course of training. Model flying is just such a skill, and
has to be learned in exactly the same way.
However, as manufacturers we have no means of influencing the way you build and operate your RC
model aircraft, and for this reason we can do no more than point out the hazards expressly. We accept no
further liability.
If you need help, please enlist the aid of an experienced modeller, join a model club or enrol at a model
flying training school. Model shops and the specialist model press are also good sources of information.
The best course is always to join a club and fly at the approved model flying site.
Adhesives contain substances which can be harmful to health under certain circumstances. It is therefore
important to read and observe the notes and warnings supplied by the glue manufacturer.
The operator must be in full possession of his bodily and mental capabilities. As with car driving, it is not
permissible to fly a model aircraft under the influence of alcohol or drugs.
Make sure that all passers-by and onlookers are aware of the hazards involved in the operation of your
model. Remind spectators to keep a safe distance from the model.
Always maintain a safe distance between your model and other people or objects. Never fly low over
people or directly towards them.
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,
the strength of glued joints and other unwanted effects.
All model flyers should behave in a way which minimises the danger to people and property. Never act in
any manner which will disturb other pilots, or have an adverse effect on safe, orderly flying at the site.
Don’t operate your model aeroplane in the vicinity of overhead power cables, industrial sites, residential
areas, public roads, school playgrounds or sports fields etc.
Pre-flight checks
Check that the radio control system works correctly and at full range before every flight: switch on the
transmitter and receiving system, and ensure that all the control surfaces work smoothly, and deflect in
the correct “sense” in relation to the stick movements.
If you are a beginner to this type of model flying, we recommend that you enlist an experienced model
pilot to help you check and test-fly the model.
Please don’t ignore our warnings. They refer to hazardous materials and processes which, if ignored, can
result in fatal injury or serious damage to property.
If you are to fly your model safely and avoid problems, it is essential that you are aware of its position
and attitude throughout each flight - so don’t let it fly too far away. If you detect a control problem or
interference during a flight, immediately land the model to prevent a potential accident. Model aeroplanes
must always give way to full-size aircraft. Take-off and landing strips should be kept free of people and
other obstacles.
Your RC system can only work reliably if the batteries are kept fully charged.

GRAUPNER/SJ GmbH D-73230 KIRCHHEIM/TECK GERMANY
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Never use hot, faulty or damaged batteries. It is important to observe the instructions supplied by the
battery manufacturer.
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/SJ GmbH, 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.
This 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. The purchaser 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 (purchase date). 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, excluding the norms of international private law, and excluding UN retail law.