Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-48
26-Jul-2017
FLIGHT CONTROLS
The flight controls enable the aircraft to be moved on all three axes. They are divided into primary and
secondary flight controls.
Axis
Primary flight control
Secondary flight control
Input device
Control surface
Input device
Control surface
Pitch
Steering column
Elevator
Pitch trim
Horizontal stabilizer
Roll
Steering column
Aileron
assisted by spoilers
Aileron trim
Ailerons
Yaw
Rudder pedals
Rudder
assisted by yaw damper
Rudder trim
Rudder
N/A
Flap lever
Slats / Flaps
N/A
Spoiler lever
Spoiler
The basic principle stays the same for all flight control systems – any deflection of the steering column or
rudder pedals is transported through the aircraft by cables, pulleys, rods to an actuator which controls the
actual deflection of an associated control surface.
This chapter is divided into several sections:
• Ailerons
• Rudder
• Elevator
• Horizontal Stabilizer Trim
• Flaps and Slats
• Spoilers
• Stall Protection System
Before diving into the different sections and details on flight controls, we’d like to introduce some features
which are visible in the virtual cockpit but not further simulated. These are failure related and hence not
further simulated.
The real CRJ offers two handles to disconnect the yokes in case either one is jammed. As flightsim does not
simulate jammed controls, these handles may be moved and the animation is visible but it has no influence on
controlling the CRJ. The associated failure messages are not simulated as well.