Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 0
Page 7.4.6
Elevator - see figure 7.4.3
Bot
h elevators are activated simultaneouslyby thesame control.Each controlsurface
is hinged at three points to the rear part of horizontal stabilizer.
The control wheel controls the two elevators through rods, bearings and bellcranks.
Astick shakeris fixed on the pitch lever linked tothe pilotcontrolcolumn lever.This isa
mechanical device to vibrate the control wheel to warn the pilotin case of an imminent
stall. When the data received from the AoA (angle of attack) sensor indicates an
imminent stall, the AoA computer actuates both the stick shaker and the stallwarning.
A spring actuator creates a nose-down artificial force which allows a better static
stability.
Each control surface is provided with an automatic anti-tab (automaticity about 0.3),
which is also used as trim tab.
Pitch trim - see figure 7.4.4
The
pitch trim is accomplished through the two anti-tabs located on left and right
elevators.
The trim tab can be controlled electrically or manually. It is activated through cables
and a chain on two screw actuators attached to the horizontal empennage.
The electrical control consists of a switch (NOSE UP - NOSE DOWN) located on the
pilot control wheel and a servo-motor attached under the pedestal.
The electrical circuit for pitch trims is protected by the AP SERVOS breaker.
Manual control wheel is installed vertically on left side of pedestal console.
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