Page Date: 20. April 2002 7 - 5
Section 7
Description and Operation of Aircraft and Systems
PilotĀ“s Operating Handbook
EXTRA 300S
7.5 FLIGHT CONTROL SYSTEM
7.5.1 PRIMARY CONTROL SYSTEM
The EXTRA 300/S is standard equipped with conventional stick-type control columns and
electric adjustable rudder pedals. The primary control surfaces are operated through a direct
mechanical linkage.
7.5.2 LONGITUDINAL FLIGHT CONTROL SYSTEM
The stick bearing is housed in a torque tube, which is also linked to the lateral flight controls.
The stick movements are transferred to the elevator by a push-pull rods.
7.5.3 LATERAL FLIGHT CONTROL SYSTEM
Push-pull rods are connected by sealed ball bearings from the torque tube to the ailerons.
The ailerons are statically as well as dynamically balanced. (Dynamically with spades).
The ailerons are supported by lubricated, sealed bearings.
7.5.4 DIRECTIONAL FLIGHT CONTROL SYSTEM
The rudder pedals with brake pedals are adjustable and operate the rudder through a cable
system. Springs keep the cables under tension when the pedals are not operated.
The pedal adjustment is archieved with electric linear actuators. The pedal adjustment
system provides an in-flight capability to adjust the pedals according the the pilot size and
operation e. i. for long cross country flight a mor relaxed, streched seating position is
possible. A full travel from the most rearward to the most forward position takes
approximately 15sec.
7.5.5 SECONDARY CONTROL
The elevator trim control is located on the right side in the cockpit. The actuation is a fail
safe design to prevent flutter in case of a single control joint failure.
The canopy lock is operated from the outside by a handle on left side of the canopy by
reaching into the cockpit through the window. The handle is used for locking as well as for
normal operation and for emergency release.
The starter/magneto switch is located on the left side of the instrument panel.
7.6 INSTRUMENTATION
Standard equipment incorporates a magneto compass, an airspeed indicator, altimeter, fuel
gauges, engine-RPM and manifold pressure / fuel flow indicator as well as an ampermeter
and a low voltage warning. Furher dual instruments exhaust gas / cylinderhead temperature
indicator and oil temperature / pressure indicator are installed.
Instruments and placards can be provided with markings in either metric or English units.
The colour markings in instruments follow US-FAR, part 23 recommendation
(see section 2).
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