BOMBARDIER BD-100-1A10, Operating Manual

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FLIGHT CONTROLS
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6
10-01-07
PRIMARY FLIGHT CONTROLS (Cont)
ELEVATORS
Pitch control is provided by the elevators and supplemented by a moveable horizontal stabilizer. Each elevator is hydrau-
lically powered by two power control units and mechanically controlled via cable runs and quadrants through fore and aft
displacement of either control column. Normally, the control systems are interconnected and there is simultaneous move-
ment of both elevators. If the elevator split is greater than 7.5
°
, an ELEVATOR SPLIT (C) CAS message will be displayed.
Elevator position is displayed on the FLIGHT CONTROLS synoptic page. A full-scale deflection of the elevator’s position
indicator corresponds to maximum travel.
Pilot inputs to the elevator are through dual control columns. The control columns are normally connected through a torque
tube, so they rotate in unison.
A control rod transmits pilot commands to the left and right forward quadrants. The left side quadrant assembly includes a
cable interface with the stick pusher servo of the stall protection system.
Separate left and right cable circuits carry the elevator command through the fuselage and terminate at the respective aft
quadrants located in the rear section of the fuselage. The aft quadrants each drive an output rod that is connected to two
control rods in series. The first control rod is connected to a gain changer mechanism, which is a four bar linkage that pro-
vides a non-linear gearing between control column movement and elevator surface. The second rod is connected to a pitch
feel simulator that provides artificial feel forces. Aft of the gain changer mechanism, a series of control rods, levers, and a
torque tube transmit the elevator command to two elevator power control units per elevator.
CF
O
1003002_001
FORWARD QUADRANT
CABLES
AUTOPILOT
PITCH SERVO
PITCH FEEL
UNITS
ELEVATOR
SURFACE
POWER CONTROL UNIT
AFT QUADRANT
CONTROL COLUMN
STICK-PUSHER
ACTUATOR
REV 1