GRAUPNER jodel robin dr 400/18 Instruction Manual
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
1
Order No. 9561
9561.M
Instructions
JODEL ROBIN DR 400/180
For glowplug or petrol engines up to 40 cc
and
electric power systems
This model requires a five-function radio control system
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
2
Specification
Wingspan approx. 2200 mm
Fuselage length excl. spinner approx. 1640 mm
Wing area approx. 84 dm²
Tailplane area approx. 18.4 dm²
Total surface area approx. 102.4 dm²
All-up weight according to fittings approx. 7800 g
Longitudinal dihedral 0 - 0.5 degrees
Centre of Gravity approx. 130 - 140 mm aft of L.E.
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 builtup 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 11/2010
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
which will 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,
otherwise 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 essential accessories
Petrol / glowplug engine and accessories
Recommended internal-combustion engines
Engine
Order No.
Capacity
cc
Silencer
Order No.
Propeller
Order No.
OS MAX FS 200 S
2728
32.4 2728.33
Included with
engine
1318.45.25
G 26 petrol engine
1903
26 1903.33 1318.45.25
MVVS 40 petrol engine
2781
39.7 2781.33 55 x 25 cm
2960.55.25
Recommended electric power system
Electric motor
Order No.
Propeller
Order No.
Flight battery
Order No.
Speed controller
Order No.
Battery
link lead
Order No.
COMPACT
740 Z
7780
45 x 25 cm
1328.45.25
LiPo 3/5200
11.1 V / 5.2 Ah
9752.3
COMPACT
CONTROL 90S
7208
2970.R
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
4
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
designed for standard-sized servos.
We recommend the following receiver power supply: two GRAUPNER 5N-5000
NiMH packs, Order No.98903.5, which should 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.
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. 3935.75, for
each aileron servo, one extension lead, Order No. 3935.32 for each landing flap
servo, and one extension lead, Order No. 3935.75, for each elevator servo.
The receiver and receiver batteries should be packed in soft foam for shock
protection.
The model is suitable for 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 to suit engine: petrol / oil mix (see instructions provided with the engine)
Fuel tubing, e.g. Order No. 1325.2
Manual fuelpump, e.g. Order No. 6870
Ignition battery, Order No. 8716.5
An appropriate battery charger and charge leads are required for the electricpowered version of the aircraft.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
5
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 JODEL ROBIN DR 400/180
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.
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.
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 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. Check that the ailerons line up neatly with the wingtips.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
6
Fit short pieces of heat-shrink sleeve over the landing flap hinges to prevent the jaws
opening.
Use your fingertips to locate the holes for the aileron horns, and melt the covering
film over them using the tip of a hot soldering iron.
Place the threaded socket in the hole, and remove a disc of film the same size as the
base flange. Assemble the threaded socket, the cheesehead screw, the horn lug and
the nut as shown in the photo. Repeat for the second aileron.
Connect the appropriate extension leads to the aileron and flap servos, and fit heatshrink sleeves round the connections to prevent them working loose; alternatively a
drop of cyano can be used. Set the servos to centre from the transmitter before fitting
the output levers on the servo output shafts.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
7
Set the servos to centre by connecting them to the receiving system. The wingmounted 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.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
8
Insert the horns in the holes in the control surfaces and set them to the correct height
(see photo). The horns can now be glued in the holes. These joints must be strong,
and we recommend the use of thickened 24-hour epoxy for durability.
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
distance 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.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Modifications reserved. No liability for printing errors 11/2010
9
The aileron and landing flap pushrods are assembled as shown in the following
sequence of photos.
Set the servo and each control surface to neutral, then adjust the length of the
pushrods and apply a drop of UHU thread-lock fluid to prevent them shifting.
The next step is to locate the undercarriage channel in the wings using your
fingertips. Remove the film over the channels using the tip of a hot soldering iron.
Insert the undercarriage leg in the channel prior to marking the position of the two
saddle clamps and the wheel fairing support block.
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