User Manual

DO NOT try to fly an out-of-balance model !

RUDDER

AILERON

IMPORTANT: Flying your model at these throws will provide you with the greatest chance for successful first flights.

If,after you have become accustomed to the way the Siai Marchetti SF-260 flies, you would like to change the throws to suit your

taste that is fine. However, too much control throw could make the model difficult to control, so remember, “more is not always better”.

ELEVATOR

20mm

40mm

15mm

1- Mount the wing to the fuselage. Using a couple of pieces of masking tape,

place them on the top side of the wing (98mm) back from the leading

edge, at the fuselage sides.

2- Turn the plane upside down, lift the airplane. Place your fingers on the

masking tape and carefully lift the plane.

3- If the nose of the plane falls, the plane is heavy nose. To correct this, move the battery pack further back in the fuselage.

If the tail of plane falls, the plane is tail heavy. To correct this, move the battery forward or if this is not possible, stick weight onto the

firewall.

When balanced correctly, the airplane should level or slightly nose down when you lift it up with your fingers.

LATERAL BALANCE:

After you have balanced a plane on the CG, you should laterally balance it. Doing this will help the airplane track straighter.

1- Turn the airplane upside down. Attach one loop of heavy string to the engine crankshaft and one to the tail wheel wire.

With the wing level, carefully lift the airplane by the string. This may require two people to make easier.

2- If one side of the wing fall, that side is heavier than the opposite. Add small amounts of lead weight to the bottom side

of the lighter wing half’s wing tip. Follow this procedure until the wing stays level when you lift the airplane.

Siai Marchetti SF-260

29- Balancing

FLAP

THE CENTER OF GRAVITY IS LOCATED BACK FROM

THE LEADING EDGE OF THE WING, AT THE FUSELAGE. BALANCE

THE PLANE UPSIDE DOWN WITH THE FUEL TANK EMPTY.

30- Control throws

98mm

Position for

right diagram.

Position for right diagram.

40mm

20mm

15mm

20mm