GRAUPNER E-TRAINER 140 Instruction Manual

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 1
Order No. 9553
BUILDING INSTRUCTIONS
E-TRAINER 140
For three Li-Po cells
This model requires a four-function radio control system
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006
Made in Vietnam
Specification
Wingspan approx. 1430 mm
Fuselage length excl. spinner approx. 1120 mm
Wing area approx. 33.6 dm
Tailplane area approx. 7.0 dm
Total surface area approx. 40.6 dm
All-up weight according
to fittings approx. 1040 g
Longitudinal dihedral approx. 0.5°
CG, measured from wing
root leading edge approx. 75 mm
Introduction
The GRAUPNER E-Trainer 140 is an elegant, ultra-lightweight electric-powered trainer
aircraft. At the development stage we placed great emphasis on low take-off weight, and
this is reflected in the model’s excellent performance and flying characteristics. The E-
Trainer 140’s docile handling makes it the ideal model for the first stage in flying “full-
house” aeroplanes after learning to fly on a rudder / elevator type. The model is easily
capable of simple aerobatic manoeuvres, while the large wing area and selected wing
section endow it with very good-natured flying characteristics and neutral handling. The
nosewheel is coupled to the rudder to provide accurate steering when the model is taxi-ing
and taking off.
The model is primarily of balsa construction, strengthened with plywood reinforcements in
particularly highly stressed areas.
The model features a two-part wing, which makes it easy to transport it even in a back-
pack on a bicycle. The tailplane is also removable - it is retained by two plastic screws.
The fuselage, wing panels, tailplane and fin are supplied factory-assembled and covered

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 2
in multi-coloured iron-on film. Little work is required to complete the machine ready to fly;
this includes attaching the fin, screwing the tailplane to the fuselage, installing the motor
mount and motor, the undercarriage and the receiving system and linkages.
A four-function radio control system is sufficient to fly the model.
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 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 we are obliged to deny all liability for loss,
damage or costs which are incurred due to the incorrect use of our products or due to
incompetent behaviour on the part of the user, 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, damages 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 and under all circumstances 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.
According to the new regulation of §103 Paragraph 3 of the LuftVZO (German Aviation
Approvals Office), all model aircraft - whether slow-flyer, park-flyer, glider, or model aircraft
propelled by any form of power plant - must be insured before the model is operated. If
you are not sure about this, please ask at your local model shop where the staff will be
glad to advise you.
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.
Guarantee terms
The guarantee covers replacement of any parts which can be shown to exhibit
manufacturing faults or material defects within the guarantee period of 24 months from the
initial date of purchase. No other claims will be considered. Cost of transport, packing and
freight are payable by the purchaser. We accept no liability for damage in transit. When
you send the product to GRAUPNER, or to the approved Service Centre for your country,
you must include a clear and concise description of the fault together with the invoice
showing the date of purchase. The guarantee is invalid if the component or model fails due
to an accident, incompetent handling or incorrect usage.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 3
Important: before you start construction
Even if you have already built many RC model aircraft, please read right through these
instructions very carefully, and check that all the parts of the kit are present. We have
taken great trouble to keep the building effort required to an absolute minimum, without
allowing any compromises in the area of safety.
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. Please work slowly and
accurately!
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.
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.
Operating the E-TRAINER 140
Before you attempt to operate the model it is essential to read right through the
assembly and operating instructions very carefully. You alone are responsible for
the safe operation of your radio-controlled model. Young persons under fourteen
years of age 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.
Please keep these operating instructions in a safe place. If you ever dispose of the
model, be sure to pass them on to the new owner. If you have any questions
regarding the safe operation of your RC model aeroplane, please turn to your local
model shop in the first instance, where the staff will be pleased to help you.
Radio-controlled model aircraft are very demanding and potentially dangerous
objects. As such they require a high level of technical knowledge and skill, together
with a responsible approach.
In legal terms our models are classed as aircraft, and as such are subject to legal
regulations and restrictions which must be observed. Our brochure
“Modellflugrecht, Paragrafen und mehr” (Model Aviation Law, Legal Requirements
and more) is available under Order No. 8034.01, 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.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 4
Be sure to use only those parts included in the kit, together with other genuine
Graupner accessories and replacement parts as recommended expressly by us.
Even if you change a single component you can no longer be sure that the system
will work reliably, and such changes also invalidate your guarantee.
Use only matching polarised electrical connectors. The flight battery, all cables and
connectors must be insulated carefully to prevent short-circuits, especially if you
make them up yourself. Never combine connectors with contacts of different
materials, e.g. tin-plated and gold-plated, as the connections will not be reliable in
the long-term.
If you prefer to use a motor switch or speed controller with an integral receiver
power supply (BEC system), please use Graupner gold-contact connectors
exclusively.
Take great care to avoid short-circuits and incorrect polarity.
The high energy density of Li-Po batteries involves a risk of fire and even explosion.
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. 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 attempt to fly it without undergoing proper training
beforehand, and the skill of model flying needs to be learned in just the same way.
As manufacturers we are not in a position to influence the way you build and
operate your RC model aircraft, and for this reason we deny all liability. All we can
do is expressly point out the hazards involved in this activity.
We suggest that you ask an experienced model flyer for help, or join a model club or
flight training school. Your local model shop and the specialist magazines are
excellent sources of information. If at all possible, it is always best to join a club and
fly at the approved model flying site.
You alone are responsible for the safe operation of your radio-controlled model. If
you have any questions regarding the safe operation of your RC model aeroplane,
please turn to your local model shop in the first instance, where the staff will be
pleased to help you.
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.
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.
If there are passers-by or spectators at your flying site, make sure that they are
aware of the dangers inherent in your activity before you start the motor, and insist
that they keep a safe distance away - at least 5 m behind the rotational plane of the
propeller.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 5
Always keep a safe distance away from people and objects when flying; never fly
low over people’s heads, and never fly 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 and material characteristics, weakened glued joints and other
unwanted effects.
All model flyers should behave in a way that minimises the danger to people and
property. Never act in any manner which will disturb other flyers and jeopardise
safe, orderly flying at the site.
Never operate your model aircraft close to high-tension overhead cables, industrial
sites, residential areas, public roads, squares, school playgrounds, public parks or
sports grounds etc.
Don’t ignore our warnings. They refer to materials and situations which, if ignored,
can result in fatal injury or permanent damage.
Propellers and other rotating parts which are powered by a motor constitute a
permanent hazard and represent 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
your 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.
Ensure that it is impossible for any object to stall or block the propeller.
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.
Every time you intend to operate your model check carefully that it and everything
attached to it (e.g. propeller, gearbox, RC components etc.) is in good condition and
undamaged. If you find a fault, do not fly the model until you have corrected it.
Whenever you are holding the model make sure that you are standing on a stable
surface and cannot slip. Wear shoes with high-grip soles, such as trainers.
Ask all the other model pilots at the flying site what frequencies they are using, and
satisfy yourself that your channel is vacant before you switch on. 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 another person might pick it up and
try to use it.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 6
Do not switch on the electric motor unless you are sure that there is nothing in the
rotational plane of the propeller. Never attempt to stop the spinning propeller.
Electric motors with the propeller attached should only be run when firmly mounted.
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. Models 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.
Never use batteries which are hot, faulty or damaged. At all times heed the
instructions provided by the battery manufacturer.
Before each flight check that all functions on the model aircraft are working
correctly, and that the radio control system is in good order and operating at full
range. Note that the motor control (throttle) function on the transmitter must always
be moved to the OFF position as the first stage in preparing for a flight. To avoid the
danger of the electric motor bursting into life unexpectedly, always switch on the
transmitter first, and only then the receiving system. The opposite applies at the end
of a flight: always switch off the receiving system first, and finally the transmitter.
Check that the control surfaces follow the movement of the transmitter sticks:
When you move the aileron stick to the right, the right aileron should deflect up, the
left aileron down. Move the rudder stick to the right, and the rudder must move to
the right.
Pull the elevator stick back towards you, and the elevator should deflect up.
Move the transmitter controls smoothly at all times; don’t jerk the sticks about
abruptly when the model is in the air.
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 work carelessly or
irresponsibly. If you take reasonable care, model flying is a highly creative,
instructive, enjoyable and relaxing pastime.
Notes on building and flying the E-TRAINER 140
Before you start construction:
If you are buying a radio control system for your new model, ensure that the transmitter
and receiving system are expressly stated to be suitable for use in model aircraft, and
bear the appropriate approval stickers.
The frequency bands used for the radio control of models are also employed by other
radio transmitting and RF equipment. For this reason it is not possible to be completely
sure that no interference will occur when you are flying your model.
No licence fee is payable for using approved RC equipment to control a model aircraft on
the appropriate channels in the 35 MHz band.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 7
For more information on this subject please contact your local telecommunications centre,
or ask at your nearest model shop.
Instructions and warnings relating to the use of LiPo batteries
Please read the instruction sheet included with every battery pack for general information
on the use of LiPo batteries.
General warnings
These batteries must not come into contact with fire or ashes.
The cells must not be allowed to contact fluids such as fresh water, salt water or drinks.
Avoid contact with liquids of all types.
Individual cells and batteries are by no means toys, and must never be allowed to get into
the hands of children. Store cells and batteries well out of the reach of children.
Batteries must not be left within reach or in the vicinity of babies or toddlers. If a child
should swallow a battery, call for a doctor or emergency medical assistance without delay.
Batteries must not be placed in a microwave oven, nor subjected to pressure: the results
may be smoke and fire or worse.
Never attempt to dismantle Li-Po cells. Taking a battery apart can cause internal short-
circuits, which could result in gassing, fire, explosion and other problems.
The electrolyte and electrolytic vapours are injurious to health. Avoid direct contact with
the electrolyte at all costs. If the material gets in your eyes, on your skin or other part of
your body, it is essential to wash the affected area immediately with copious amounts of
clean water. Consult a doctor as soon as possible thereafter.
Batteries installed in a device should always be removed from the apparatus if it is not to
be used again in the immediate future. Always switch off such devices after use to avoid
discharging the cells to a dangerous level. Recharge the batteries in good time. Store
batteries on a non-flammable, heat-resistant and non-conductive surface.
If you allow a Li-Po battery to become deep-discharged, it will inevitably be ruined, and
must not be used again.
During construction
The receiving system components and control surface linkages should be installed at the
appropriate stage of assembly, as it may be very difficult or even impossible to fit them
later.
The building instructions
In basic terms the instructions reflect the correct sequence of assembly. The notes below
are intended to explain certain additional points.
You may wish to alter the order of assembly; this should not cause problems, but please
think carefully about the consequences of any change you make.
Bear in mind that tools such as balsa knives, modelling pins, the ends of thin wire etc. are
sharp or pointed, and can cause injury if not handled with due care.
Ensure that children do not have access to tools, adhesives and paints.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 8
When using solvent-based adhesives be sure to work in a well-ventilated room.
Take waste adhesives and paints to your nearest toxic waste collection point.
An unobstructed work area of generous size is very helpful for all types of modelling
activity.
If you are a beginner to modelling and are not sure about any of the more difficult
processes, ask an experienced modeller for advice and help.
Rules of behaviour
Never fly your model from a public road, path or square, or in the vicinity of buildings or
high-tension overhead cables.
Don’t fly your E-TRAINER 140 in nature reserves, protected areas or SSSIs (Sites of
Special Scientific Interest). Please have respect for the animals and plants which live in
and around your flying site.
Bear in mind that trees and bushes are the living space and nesting sites of birds, and
should not be disturbed unnecessarily.
Never endanger animals, spectators or other pilots.
Radio control system for the E-TRAINER 140
We suggest the following items as the minimum equipment for this model:
1 mc-12 computer RC system, 35 MHz band Order No. 4724 or 4724.B
3 C 271 servos Order No. 5107
1 R 700 micro-receiver Order No. 3551
Please see the main GRAUPNER FS catalogue for details of suitable battery chargers.
Electric power system and accessories
1 COMPACT 350S 7.2 V motor Order No. 7712
1 Speed controller Order No. 2896
1 LiPo flight battery Order No. 7640.3
1 SLOW-FLY PROP Order No. 2945.20.11
1 Precision spinner Order No. 1298.404
1 Extension lead Order No. 3935.11
1 Hook-and-loop (Velcro) tape Order No. 3368.1
The model is very highly pre-fabricated, and is built to an extremely high standard. The kit
includes a GRP cowl. Please check the covering of the major components and run an iron
over any areas of film which have become slack. Iron down all edges, especially at the
control surfaces hinges and where film panels overlap. We recommend that you apply
clear adhesive tape over the faces into which the hinges are to be glued, as damp tends to
get under the film at these points and lift the edges.
Materials and tools required
Adhesives: Ponal (white glue) Order No. 969 Wood to wood

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 9
Cyano-acrylate (“cyano”) Order No. 5821 Wood to film
Wood to metal
UHU thread-lock fluid Order No. 952 Metal threads
Tools: 1.5 mm Ø drill
2.0 mm Ø drill
Sawblade Order No. 861 or 860
Cross-point and slot-head screwdrivers
1.5 mm A/F Allen key Order No. 5735.1,5
Pliers
File
Tailplane and fin
Using a hot soldering iron, melt away the film over the slot in the top of the fuselage at the
tail end. Insert the fin, mark the line of the fuselage on both sides, then melt away the
excess film on the fin using the soldering iron again.
Glue the doublers to the tailplane using cyano, and attach it to the fuselage using the M4 x
20 round-head plastic screws supplied.
Glue the fin in the slot in the fuselage, checking that it is at right-angles to the tailplane.
Locate the opening in the tail end of the fuselage for the elevator linkage, and melt away
the film as already described. Attach the elevator to the tailplane using the patent hinges
supplied, and glue the hinges in place using cyano.
Cut down the elevator horn as shown, and bevel the horn spreader plate to provide proper
clearance.
Screw a clevis to the elevator pushrod, slip it into the guide tube from the tail end, and
connect it to the horn. Push a ring of silicone fuel tubing over the clevis to secure it. Find
the correct horn position on the elevator (the pushrod should not be under stress), and drill
2 mm Ø holes through the horn and elevator. Attach the horn using M2 screws which
engage in the spreader plate on the opposite side. Snip off the excess screw length and
file back flush. Caution: hinge pivot line = linkage pivot point.
Cut down the servo output devices as shown. Drill out one inner hole and one outer hole of
the rudder / nosewheel output lever using a 2 mm Ø bit. Insert the screw-lock pushrod
connector from above, fit the self-locking nut on the underside and tighten it to the point
where the connector just swivels smoothly, without lost motion. Set the servos to centre
and fit the output arms on the servos.
Press the rubber grommets and tubular spacers into the servo mounting lugs and place
the servos in the openings in the fuselage. Screw a clevis on the front end of each pushrod
inside the fuselage. Position the servos in line with the pushrods, drill 1.5 mm Ø holes
through the mounting lugs, and fix the servos in place using the retaining screws supplied
with them.
Looking at the fuselage from the tail, the left-hand servo operates the rudder and
nosewheel, the right-hand servo the elevator. Set the servos to neutral by switching on the

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 10
RC system and setting the transmitter trims to centre. Centre the control surfaces, and
tighten the grubscrew in each pushrod connector fully. Secure each grubscrew with a drop
of UHU schraubensicher (thread-lock fluid).
Undercarriage
Fix the noseleg bracket to the nose bulkhead using the 3.2 x 9.5 mm self-tapping screws
supplied. Cut the steering pushrod snake to length, fit it through the nose bulkhead and
glue it in place using cyano; it should project by about 1.5 - 2 mm at the front. Connect the
pushrod to the nosewheel steering arm (you may need to adjust the pre-formed bend). Slip
the plain end of the pushrod through the pushrod connector mounted on the rudder servo,
and route it through the notch in the bracket. Fit the nosewheel leg through the holes in the
bracket, set it flush with the top of the moulding, and tighten the screw in the steering arm
firmly.
Set the rudder / steerable nosewheel servo to centre, tighten the grubscrew in the pushrod
connector and snip off the excess wire length. Secure the grubscrew with a drop of UHU
thread-lock fluid, Order No. 952.
Motor installation
Glue the motor mount components in the slots in the nose bulkhead using Ponal (white
glue). Cut the triangular fillets to length and glue them between the nose bulkhead and the
motor mounts.
Fix the motor to the motor mount using the screws supplied. Connect the speed controller
to the motor, check that it rotates in the correct direction, and then slide it back into the
fuselage through the opening in the motor bulkhead.
Cowl
Cut a slot in the bottom rear edge of the cowl to clear the noseleg unit. Stick a length of
paper masking tape to the fuselage on each side, positioned about 10 mm aft of the nose
bullhead. Place the cowl on the fuselage, fit the spinner on the motor shaft, and align the
cowl with the spinner and the trim stripes. Mark the edge of the cowl on the paper masking
tape. Measure the width of the tape forward (onto the cowl), deduct 3 mm (half the
thickness of the motor bulkhead) and mark the hole positions on the cowl. Fit the cowl on
the fuselage again and check that everything fits correctly, then drill 1.5 mm Ø pilot-holes
at the marked points. Remove the masking tape and fix the cowl to the fuselage using the
2.2 x 6.5 mm self-tapping screws provided.
Undercarriage
Insert the undercarriage units in the holes in the underside of the fuselage, and fix them in
place using the plastic saddle clamps and 3 x 10 mm round-head screws supplied.
Cut the undercarriage fairing as shown in the photo, trim it to fit round the undercarriage
legs on both sides, and fix it in place with 3 x 10 mm round-head screws.
Fit one wooden collar on one undercarriage leg, followed by a wheel and a second
wooden collar on the outside end. Repeat with the other wheels. Secure the wooden rings
with a drop of cyano, but take care not to glue the wheels to the wire.
Wing
The wing panels can be glued together permanently or left separate.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 11
If you wish to keep the wings as separate panels, the aileron servo must be installed in
one panel. Mark the width of the servo case on one wing root and cut out a clearance slot.
Place the servo plate in position and mark its outline on the wing. Melt the film using a
soldering iron, and remove it over the joint area. Don’t use a knife to cut the film, as this
would score the wood and reduce the wing’s structural strength.
The servo plate can now be glued over the opening. Prepare the servo as described
earlier, place it in the opening and drill 1.5 mm Ø pilot-holes through the mounting lugs.
Trim the wing / fuselage fairing along the marked edge, and cut off the pillars at the wing
screw hole positions. Fit both wing panels on the aluminium joiner tube and screw the wing
to the fuselage with the fairing in place. Check that everything fits properly, then glue the
fairing to one wing panel only, using high-viscosity (thick) cyano.
If you prefer to join the wings permanently, fit both panels on the aluminium joiner tube
after applying plenty of glue to one root rib. Push the panels together firmly, apply strips of
tape over the joint and clamp the panels to prevent them twisting before leaving the glue to
set hard.
When the joint has cured, trim the wing / fuselage fairing as already described, and glue it
to the wing using high-viscosity cyano.
The ailerons can now be attached to the wings using patent hinges and cyano, as
described previously.
Screw the aileron linkage lugs to the vertical torque rod ends, and set the linkage holes to
a height of around 15 mm on both sides. Cut down the cruciform aileron servo output lever
as shown, and drill out both outer holes to 2.0 mm Ø. Attach the pushrod connectors to the
output lever using M2 self-locking nuts (the pushrod connectors must swivel smoothly, but
without slop). Set the aileron servo to neutral and fit the output lever on the servo shaft.
Screw plastic clevises to the aileron pushrods, and slip the plain ends through the pushrod
connectors. Connect the clevises to the aileron torque rod lugs and secure them with
silicone rings in the usual way. Set the ailerons to neutral (= following the airfoil section),
tighten the grubscrews in the pushrod connectors, and snip off the excess pushrod length.
Secure each grubscrew with a drop of UHU thread-lock fluid, Order No. 952.
Wingtips
Use Lexan shears to cut out the moulded wingtips along the marked lines, sand the cut
edges and glue them to the wings using cyano. Take care to align them with the ailerons.
Battery compartment
Open the battery compartment hatch, and cut the Velcro (hook-and-loop) tape to length.
Glue the “hook” tape to the battery support, and fix the “loop” tape to the battery. The
battery can now be attached to the battery support simply by pressing it into place; it can
be removed by pulling the tape apart again.
Or secure the battery with rubber bands.

GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
We reserve the right to introduce modifications. No liability for printing errors. 02/2006 12
Receiver
Cut the Velcro tape to length and glue one piece to the underside of the receiver, the
mating piece to the fuselage floor. Run the aerial wire through the fuselage to the tail end,
and slip it through a spare hole in the elevator horn, taking care to leave the wire slack.
Connect the servos to the receiver (1 = speed controller, 2 = aileron extension lead, Order
No. 3935.11, 3 = elevator, 4 = rudder).
Assembling the E-TRAINER 140
Fix the tailplane to the tail end of the fuselage using the M4 x 20 plastic screws supplied,
connect the clevis to the elevator horn and fit the silicone retainer ring. Fit both wing
panels on the aluminium joiner tube, connect the aileron clevis and fit the silicone retainer
ring. Connect the aileron servo to the extension lead, then fit the wing locating tongue into
the slot in the former, and fix the wing to the fuselage using the M4 x 30 plastic screws
supplied. Tighten the screws just to the point where the wings are held securely to the
fuselage - don’t overtighten them.
Balancing the E-TRAINER 140
Assemble the model completely, ready to fly (including flight battery), and support it on
both sides of the fuselage at a point about 75 mm aft of the wing root leading edge. The
model should now balance level, with the nose slightly down. Add lead ballast to the tail or
nose if necessary. The model is now ready to fly, but not before you have checked that all
control surfaces are exactly at centre (neutral) when the transmitter controls and trims are
also at centre.
Control surface travels Expo value
Ailerons approx. 9 mm up, 9 mm down 35%
Elevator approx. 10 mm up, 10 mm down 35%
Rudder approx. 18 mm right and left 35%
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 the elevator must deflect
up (stick forward: elevator down). If you move the aileron stick to the right, the right aileron
should rise, the left aileron fall. When you move the throttle stick forward, the motor should
run at full power.
Replacement parts
Order No. Description
9553.2 Fuselage
9553.3 Wing
9553.4 Tailplane and fin
9553.7.1 GRP cowl
All that remains is to wish you many hours of pleasure flying your E-TRAINER 140!