GRAUPNER YAK 11 RENO Bedienungsanleitung

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

Modifications reserved. No liability for printing errors 04/2011

Order No. 9392

9392.MX

Instructions

YAK 11 RENO

For glow and petrol engines up to 26 cc capacity

This model requires a six-function radio control system

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

Modifications reserved. No liability for printing errors 04/2011

Specification

Wingspan approx. 1720 mm

Fuselage length excl. spinner approx. 1480 mm

Wing area approx. 60 dm²

All-up weight according to fittings approx. 4700 g

Longitudinal dihedral approx. 0.5°

Centre of Gravity approx. 160-170 mm aft of wing leading edge,

measured at fuselage centreline

Caution: this model is not a toy!

If you are a beginner to this type of powered model, please ask an ex-

perienced model flyer for help and support. If you attempt to operate the aero-

plane without knowing what you are doing, you could easily injure yourself or

some-body 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 pos-

sible, 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.

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 04/2011

Notes on building the model

•Before you start building the aircraft it is essential to read right through the in-

structions.

•Please bear in mind the dangers inherent in the handling of tools.

•When preparing the wiring, be sure to use cable capable of carrying the currents

likely to 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

using 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 items required

Engine and accessories

Engine

Order No.

Capacity

Silencer

Order No.

Propeller

Order No.

OS MAX FS

120

SURPASS III

1886

19.96 1886.33 38 x 20 cm

1318.38.20

OS MAX FS

120

SURPASS-E

1848

19.96 1886.33 38 x 20 cm

1318.38.20

OS MAX 120

2703

20.0 2703.33 and

spacer 2703.36A

38 x 25 cm

1318.38.25

G 26

petrol engine

1903

26 1556 and

manifold 1556.2

with Teflon hose 1556.3

and spring clips 1556.4

45 x 20 cm

1318.45.20

Radio control system

The RC system must feature at least six control functions and eight 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 battery: 2/2500 7.4 V G 3.5 20C LiPo,

Order No. 7633.2, which needs to be maintained carefully before and after each

flying session. As ON / OFF switch for the receiving system we recommend the PRX-

3A, Order No. 4135.

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

Modifications reserved. No liability for printing errors 04/2011

You will need five extension leads, Order No. 3935.18, to connect the aileron, landing

flap and retract servos to the receiver.

Each aileron servo lead requires an extension lead, Order No. 3935.32, while the

landing flap leads require extension leads, Order No. 3935.11.

Foam rubber is required for protecting the receiver and battery from shock damage.

Adhesives

Fast-setting epoxy, e.g. UHU plus schnellfest, Order No. 962

Slow-setting epoxy, e.g. UHU plus endfest 300, Order No. 950.15

Wood glue, e.g. UHU Holzleim express, Order No. 958.60

UHU hart, e.g. Order No. 534.35

UHU ALLESKLEBER Kraft, Order No. 1096

Cyano-acrylate, e.g. Order No. 5821

Thread-lock fluid, e.g. Order No. 952

Items required to fly the model (not included)

Fuel based on synthetic oil, to suit engine

Fuel filter, e.g. Order No. 1650.1

Fuel tubing, e.g. Order No. 1643.1L for glowplug engines

Fuel tubing, e.g. Order No. 1325.2 for petrol engines

Manual fuelpump, e.g. Order No. 6870

Glowplug energizer battery with plug clip, e.g. Order No. 3248

Electric starter, e.g. Order No. 1628

Starter battery, e.g. Order No. 2592

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, universal glowplug spanner, pencil or felt-

tip pen, fine-tip soldering iron.

Assembling the YAK 11 RENO

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 inform your model shop without delay.

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

Modifications reserved. No liability for printing errors 04/2011

Assembling the fuselage and tail panels

Attach the control surfaces to the wing panels, the tailplane and the fin by inserting

the hinges in the slots. Apply a drop of adhesive (cyano) to both sides of each hinge

before pushing the control surface into place, leaving an even gap around 0.5 mm

wide.

Drill holes for the horns at the marked points in the elevators and rudder. You can

avoid drilling right through the control surfaces by clamping a collet on the drill as

shown in the photo. Remove a disc of covering film the same size as the horn base

from the area around the horn holes,

Tip: a good method of cutting a neat circle in the film is to use a length of brass tube

whose inside diameter (I.D.) is the same as the outside diameter (O.D.) of the horn

base: sharpen one end of the tube, and twist it gently into the film. Fit the screw in the

horn base until it is flush with the underside, add the locknut, and secure it with UHU

thread-lock fluid.

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

Modifications reserved. No liability for printing errors 04/2011

The horns can now be glued permanently in the control surfaces: ensure that the

flange of the aluminium socket rests flat on the surface. Wipe off excess adhesive.

The next step is to glue the tailplane and fin to the fuselage. Place both components

on the fuselage and position them accurately, i.e. the tailplane should be at right-

angles to the fuselage centreline, and the fin should engage fully in the slot in the

former. In this position mark the outline of the fuselage on the underside of the

tailplane, and the outline of the fin base on the top of the tailplane.

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

Modifications reserved. No liability for printing errors 04/2011

Remove the tailplane and fin, and run the tip of a hot soldering iron just inside the

marked lines on the tailplane to melt the film. Remove the superfluous film as shown.

The tailplane and fin can now be glued to the fuselage: position the tailplane as

described earlier, and tape it in place to prevent it shifting as the glue dries.

While the glue is hardening, press the rubber grommets and metal spacer sleeves

into the servo mounting lugs. Place the servos in the servo plate, and drill 1.5 mm Ø

pilot-holes for the servo retaining screws.

Mount the elevator, rudder and throttle servos in the servo plate as shown in the

photos below.

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

Modifications reserved. No liability for printing errors 04/2011

Mount the swivel pushrod connector in the output arm of the throttle servo using the

screw and nuts, and check that it rotates smoothly, without noticeable slop. Secure

the nuts with a drop of UHU thread-lock fluid to prevent the connector working loose.

Open up the linkage holes in the elevator servo output arm to 1.8 mm Ø.

Connect the clevises to the rudder and elevator horns as shown in the photo.

Set the control surfaces to neutral, centre the servos from the transmitter, and

connect the pushrods to the servo output arms. Repeat the procedure with the

pushrod between the rudder and the tailwheel. When the rudder is at centre, the

tailwheel must be at neutral, otherwise the model will not roll straight on the ground.

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

Modifications reserved. No liability for printing errors 04/2011

Assembling and installing the fueltank

Cut a piece of fuel tubing and push it onto the fueltank clunk pick-up. Push the free

end of the fuel tubing onto one of the tubes in the fueltank stopper, and check that

the pick-up will be able to move freely inside the tank without binding or jamming

when the stopper is in place. Use a heat-gun or match to heat the other two plastic

tubes gently, so that they can be curved: one should face down (later used to fill the

tank); the second faces up (serves later as overflow when the tank is filled).

Now push the tank stopper, complete with pick-up and pre-formed tubes, into the

throat of the fueltank, and tighten the cross-point screw to clamp the stopper in place.

It is essential to tighten the screw to the point where the tank is completely sealed.

You can check this by holding the tank under water and blowing hard into the fuel

tubes: any air bubbles indicate a leak which must be eliminated.

Connect a further length of fuel tubing to each stub tube projecting from the fueltank

stopper.

Mark the individual fuel lines so that you can identify which is the fuel feed (to the en-

gine), which is the overflow, and which is the filler line.

Working from the wing saddle area, push the fueltank into the tank compartment,

passing the three fuel lines through the hole in the bulkhead.

Glue the cross-piece in place aft of the fueltank, so that it cannot shift in flight.

If you intend to install a petrol engine, a petrol-proof fueltank stopper, e.g. Order No.

133, must be fitted in place of the standard stopper. For the same reason replace the

silicone fuel tubing with petrol-proof tubing, e.g. Order No.1325.2.

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

Modifications reserved. No liability for printing errors 04/2011

Installing the engine

This section describes the installation of the OS MAX 120 AX, but the general

procedure is the same for any other power plant.

The engine should be screwed to the arms of the two-part engine mount in such a

way that the distance between firewall and the front of the propeller driver is around

140 mm.

Screw the engine mount to the firewall, positioned so that the engine is located

centrally on the firewall: mark the position of the screw-holes on the firewall, then drill

the holes to suit the captive nuts. Fix the engine mount to the firewall using the four

cheesehead screws and captive nuts supplied in the kit. Apply UHU thread-lock fluid

to the screws to prevent them working loose.

The throttle arm on the carburettor must be removed in order to fit the throttle

pushrod. Drill a 3.5 mm Ø hole in the firewall in the appropriate location for the

throttle pushrod. Slip the throttle pushrod and guide tube through the firewall and into

the fuselage; the plain end must pass through the hole in the former and then

through the cross-hole in the swivel pushrod connector mounted on the throttle servo.

Fix the throttle arm on the carburettor throttle barrel in such a way that it is parallel to

the axis of the carburettor when the throttle barrel is exactly half-open.

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