GRAUPNER JODEL ROBIN DR 400/180 Instructions Manual

Re: Order No. 9370

9370.M

Instructions

JODEL ROBIN DR 400/180

For internal combustion motors up to 58 cm³

Requires a HoTT radio control system with 5 functions

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

1

Specification
Wingspan about 2500 mm
Fuselage length without spinner about 1910 mm
Wing area about 98 dm²
Tailplane area about 10 dm²
Total surface area about 108 dm²
All-up weight depending on equipment about 11000 g
EWD 0-0.5 degree
Centre of gravity about 140 -150 mm behind the leading

edge

Caution: This model is not a toy!
If you do not have experience with such motorised models, please ask experienced
model flyers for help. If the model is operated without the proper knowledge, injuries
can result. Think of your health and safety!

Important! Before you start the assembly!
Even if you have already built lots of RC models, read these instructions through
carefully and check the parts in the kit for completeness. A lot of effort was made to
keep things as simple as possible without neglecting safety.

Note on the covering sheet
Because of strong changes in the weather (temperature, humidity, et cetera), small
creases can appear in the covering sheet. In rare cases, the components can even
be warped. This lies in the nature of wood construction with covering sheet. This can
be corrected as follows using a hair dryer like those available to model builders.
Creases: Blow hot air over the area and rub with a soft cloth.
Warped area: Gently twist the area against the direction of warping and smooth

it out again using hot air.

Caution! Never use more heat than is absolutely necessary. If the iron is too hot, the
covering sheet will melt and holes will form.

The extensively pre-fabricated model can be built in a very short time. However, the
remaining steps are important and have to be carried out with care. Doing this work
properly determines whether the model will have the prescribed rigidity and flight
characteristics; so please work slowly and precisely!

When putting screws into wood, apply a little casein glue to keep them from
loosening: Squirt casein glue into the drill hole and screw in the screw.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

2

Tips on building the model

2760.34

2760.51

6861.25

6865

• Before assembling the model, it is essential to read the construction diagram and
the instructions all the way through. When using tools, be aware of the possible
dangers.

• Use only suitable cables that are adequate for the electrical currents that occur
during operation.

• Set up the receiver aerial as far as possible away from the cables carrying the
operating current (at least 3 cm).

• Clean residual grease from all connections that are to be glued. This could be
done, for example, through sanding and using a non-relubricating cleaning
solution. The same goes for the surfaces to be painted, in order to make sure that
the paint sticks. Before gluing parts, always roughen the corresponding surfaces
(especially for GFR fuselages) carefully with fine sandpaper and de-grease them
thoroughly, for example with acetone. Otherwise, adequate adhesion is not
assured.

Other required accessories

Internal combustion motor and accessories

Motor
Order No.

OS GT 55

2760

Radio control system
It must have at least 5 control functions and 10 servos. Furthermore, the
transmitter must be capable of reversing the direction of servo rotation.

Particularly recommended: Computer systems MC-22s to MC-24. Servos with
standard dimensions can be installed.
As receiver battery, we recommend: two GRAUPNER 5N-5000 NiMH Order No.

98903.5, which must always be serviced well before and after flight operations,

meaning that the battery has to be charged and discharged again multiple times until
the specified capacity has been reached.

Capacity
cm³

55

Silencer
Order No.

Exhaust
manifold
Order
No.

Propeller
Order No.

56x25 cm

2960.56.25

Teflon
hose
Order No.

Spring
clamps
Order
No.

2
required

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

3

Connecting the two ailerons and the landing flap servos to the receiver requires four
spark suppression filters, Order No. 1040 or one folding ferrite ring, Order No.

98516.1 with four extension cables Order No. 3935.32.

The two aileron servo cables must each be extended with an extension cable Order
No. 3935.65; the two landing flap servo cables with Order No. 3935.11; the two
elevator servos with Order No. 3935.105. For the servos for throttle coupling, nose
landing gear, aero-tow coupling, et cetera, seven extension cables Order No.

3935.32 are needed. Connecting the telemetry sensors requires one cable Order No.

33700.2.

Two Order No. 7907.2 are used as servo control arms.
Receiver and battery: Store in foam material.
Any servo of standard size and an adjusting power of about 50 Ncm can be installed.

Adhesives

Epoxy glue, such as "UHU plus schnellfest," Order No. 962
Epoxy glue, such as "UHU plus endfest 300," Order No. 950.43
"UHU Holzleim express" casein glue, Order No. 958.60
"UHU hart" glue, Order No. 534.35
Fast-setting (cyano-acrylate) glue, such as Order No. 5821
Fast-setting glue, such as Order No. 5821
Thread lock fluid, such as Order No. 952
Heat-shrink tubing, Order No. 3391.8

Accessories for operation (not included)
Fuel, depending on the motor petrol/oil mixture (see instructions for the motor used)
Fuel tubing, petrol, such as Order No. 1325.2
Manual fuel pump, such as Order No. 6870
Ignition battery, Order No. 8716.5
OS Super-Filter Order No. 1646.1

Required tools (not included)
Various (Philips) screwdrivers, needle-nose pliers, flat-nose pliers, wire cutter, balsa
knife or razor blade, various drills, pencil, felt marker, soldering iron with fine tip.

Assembling the JODEL ROBIN DR 400/180

Wings with undercarriage and tailplane

Do not begin the assembly until you have familiarised yourself with the components
and the individual construction stages. If you are not satisfied with any component,
report it to your retailer before you start the construction process.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

4

Using sandpaper or sanding block, sand the control horns on the surfaces to be
glued in order to achieve an adequate connection when gluing.

As seen in the photos, remove the covering from the slots for the GRP control horns,
put a dab of glue into the slot, and push the control horn in until it stops.

Wipe off any excess glue.

Until the glue hardens, the servos
are installed in the corresponding mounts and fastened into the wing or tailplane.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

5

Extend the servo cables using the corresponding extension cable and make sure
they can not come loose, for example with a piece of heat-shrink tubing or a drop of
fast-setting glue. Using the RC system, bring the servos into centre position and
install the servo levers.

Fasten the servo to the attachment block using the screws included with the servos.
To do so, insert the rubber grommets with the brass hollow rivets, collar downward,
into the servo flange. For drilling Ø 1.5 mm holes for the screws, the hollow rivets can
be used as a drilling template. To make it easier to push them in,
the hollow rivets can be placed onto a screwdriver of the proper size.

Now the servo cables are pulled into the wing halves and tailplane halves using a
thread. Just behind the connector, tie the thread to the cable and pull it in so that it
comes out the wing root.
With servo and rudder in neutral position, screw together the lengths of the rods for
the ailerons, landing flaps, and elevators, adjust them; then use thread lock fluid
(such as UHU schraubensicher) and lock nuts to secure them against loosening.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

6

As shown in the photo, secure the hinges for the landing flaps using heat-shrink
tubing.

On the underside of the wings, there are markings indicating where the flap hinges
can be screwed in. Make sure that the axes of rotation of the hinges are all the same
distance from the trailing edge of the wing.
As shown in the photo at the left, use one screw to

fix the hinges in place; then use an engineer's square or geometric protractor for
alignment with the trailing edge, and fasten the hinges with two more screws. Now
push the landing flaps up against the wings and tape them in place temporarily; align
them, and fasten them with screws.
Screw the pushrods together as shown in the following photos.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

7

In the next step, use your fingers to feel for the slot for the landing gear wire, and
melt it free with a hot soldering iron.

Now place the leg of the undercarriage into the slot to mark the attachment points of
the two tabs and the wheel fairing support block.

Drill pilot-holes in the wings for the retaining screws; then screw the tabs and the
wheel fairing support block to the wing.

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

We reserve the right to introduce modifications. Not liable for printing errors!

11/2011

8