SA 160
AIRCRAFTA I R C R A F T
Symphony
AIRCRAFT
7-7
7.7 FLIGHT CONTROLS
Feb 25, 2005
SECTION 7
DESCR. & OPERATION
The aircraft is equipped with dual controls.
The ailerons and the elevator are operated by the control stick, and the
rudder by foot pedals in front of each seat, via a system of control
cables, pulleys and turnbuckles. (See Fig. 7-1, 7-2 and 7-3)
The trim-tab serves the dual function of providing trim control and
pitch control forces. The trim tab is actuated by a trim control wheel
located on the control console between the seats. Forward rotation of
the wheel gives nose down trim and aft rotation gives nose up trim.
exclusively used in the wings, flaps and ailerons. One piece fore and aft
spars are made of extruded aluminum construction to carry bending and
torsion loads. At the roots, they are attached by removable bolts to the
fuselagecage.
Attached to the aft spar are the flap tracks, the aileron hinges and the
bearings for pulleys and bell cranks. The wing strut ties into a reinforced
ribbeam,whichspansbetweenforeandaftspars.
Welded aluminum fuel tanks are fitted into the first main bay at the root
ofthewings. Fillercups, vents and drains are provided in each tank.
Ailerons are actuated via control cables and bell cranks with push rods.
Theaileronsaremassbalanced.
The fowler flaps are actuated by an electric flap actuator that is installed
intheleftwingstructure.
The tail control surfaces are also of conventional aluminum construction.
The vertical tail has a vertical stabilizer and a rudder with aerodynamic
andmasscompensationatthetopend.
The rudder is connected to the vertical stabilizer by three hinged
brackets. The lower one has a yoke that drives the rudder by means of
controlcables.
The horizontal tail has a stabilizer and an elevator. The elevator is
attached to the stabilizer by piano-type hinges and is driven by a
pushrod at the center of the elevator base. The elevator has a trim tab,
which is attached to the trailing edge (starboard side). The elevator is
aerodynamicandmassbalancedatthetips.
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