Center Of Gravity (Cg); Control Surface Travel; Technical Specifications - Carf-Models SIAI Marchetti SF-260 Construction Manual

CARF-Models

4.3. Center of Gravity (CG)

As described earlier, the CG can be achieved thru the positioning of the heavy components
(batteries, etc.).
The CG of the completed model (tank empty, wings mounted) is at the leading edge of
the wing tube.
Supported at this point, the nose of the model should hang slightly down.
For those with small workshops, the CG can still be controled without the wings. In this case,
all other components must be mounted (with elevators, tank empty).
In this configuration, the CG is 25mm in front of the wing tube.

4.4. Control Surface Travel

The following values are to be taken as initial settings. After the first couple of flights, the
values can be adjusted to taste.
Elevator:
Aileron:
Rudder:
Flaps:
Attention!
When the nose gear is retracted, the steering servo should be switched off, (computer
transmitter function – if available) to prevent the servo from stalling when rudder
commands are given.

5. Technical Specifications

112" (2830 mm) w/ tip tanks
93" (2370 mm)
1900 inch² / 123 dm²
33 - 35 Lbs (15 - 16 kg) dry
60 cc single - 120 cc twin 2stroke, 100 cc Moki 4stroke
SIAI Marchetti SF-260
+40 / - 35 mm, Expo 40%
+25 / - 30 mm, Expo 35%
R/L 45 mm, Expo 30%
Takeoff: - 20 mm (vom Querruder gemessen)
Landing: - 80 mm (vom Querruder gemessen)
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