GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler 02/2007
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the retaining screws. Ensure that the outermost linkage holes match the diameter of the clevis pins.
The output arms should be fitted to the servos after setting them to centre from the transmitter.
Fix the servos in the mounts using the screws supplied with them.
Insert the hinges half-way into the slots in the landing flaps, and glue them in place. Allow the
adhesive to set hard, then glue the projecting hinges in the slots in the wing, leaving a gap 1 mm wide
between the wing and the leading edge of the flap.
Attach the horns to the ailerons and flaps at the marked points, as described for the elevators and
rudder: drill the holes, remove the discs of film and glue the horns in place.
Connect the clevises on the pushrods to the holes in the horn lugs. Set the control surfaces and
servos to centre, and mark the point on the pushrods where they cross the servo output arms.
Bend the pushrods at right-angles and cut off excess rod material so that the ends project beyond the
retaining clips by about 1.5 mm. Connect the pushrods to the outermost hole in the servo output arms,
and fit the retaining clips to secure them.
Glue the two plastic bushes in the holes in the underside of the wing to act as a reinforcement for the
wing retaining screws.
Assembling the YAK 11
To make it easier to connect the aileron, flap and retract servos to the receiver, we recommend that
you connect a 100 mm extension lead to each of the appropriate receiver sockets.
Connect the aileron, flap and retract servos to the extension leads, insert the hardwood dowels in the
holes in the fuselage bulkhead, and attach the wing to the fuselage using the two plastic screws
supplied. Tighten them just to the point where the wings are firmly seated.
Balancing the YAK 11
Assemble the model with the fueltank empty, invert it, and support it under both wing roots at a point
about 170 mm aft of the wing root leading edge. If the CG position is correct, the model will hang level,
with the nose inclined slightly down. If necessary, re-position the receiver battery or glue lead ballast to
the nose or tail to obtain the correct balance. All the control surfaces must be exactly at centre when
the transmitter sticks and trims are in the neutral position; check this before the first flight.
Control surface travels for normal flying
Ailerons
17 mm up, 17 mm down
Elevators
18 mm up, 18 mm down
Rudder
35 mm right, 35 mm left
Flaps
take-off position: 15 mm
landing position: 60 mm
We recommend that you set 30% exponential at the transmitter for the aileron and elevator functions.
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 both elevators must deflect up (stick forward:
elevators 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 to the full-throttle position, i.e. the carburettor
barrel should be fully open. The flaps can be controlled using either a proportional slider or a three-
position switch. We recommend a two-position switch for the retractable undercarriage.
We wish you every success and many enjoyable flights with your YAK 11.
