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bellcrank attached to the elevators.
Pitch Trim System
Pitch trim is provided by adjusting the neutral position of the
compression spring cartridge in the elevator control system by means
of an electric motor. It is possible to easily override full trim or autopilot
inputs by using normal control inputs. A ground adjustable trim tab is
installed on the elevator to provide small adjustments in neutral trim.
This tab is factory set and does not normally require adjustment. An
electric motor changes the neutral position of the spring cartridge
attached to the elevator control horn. A conical trim button located on
top of each control yoke controls the motor. Moving the switch forward
will initiate nose-down trim and moving the switch aft will initiate noseup
trim. Neutral (takeoff) trim is indicated by the alignment of a
reference mark on the yoke tube with a tab attached to the instrument
panel bolster. The elevator trim also provides a secondary means of
aircraft pitch control in the event of a failure in the primary pitch control
system not involving a jammed elevator.
Elevator (pitch) trim operates on 28 VDC supplied through the 2-amp
PITCH TRIM circuit breaker on ESS BUS 2.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-9
Figure 7-1
Elevator System
SR22_FM07_1461
March 2010
7-10 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Aileron System
The ailerons provide airplane roll control. The ailerons are of
conventional design with skin, spar and ribs manufactured of
aluminum. Each aileron is attached to the wing shear web at two hinge
points.
Aileron control motion is generated through the pilot's control yokes by
rotating the yokes in pivoting bearing carriages. Push rods link the
pivoting carriages to a centrally located pulley sector. A single cable
system runs from the sector to beneath the cabin floor and aft of the
rear spar. From there, the cables are routed in each wing to a vertical
sector/crank arm that rotates the aileron through a right angle conical
drive arm.
Roll Trim System
Roll trim is provided by adjusting the neutral position of a compression
spring cartridge in the aileron control system by means of an electric
motor. The electric roll trim is also used by the autopilot to position the
ailerons. It is possible to easily override full trim or autopilot inputs by
using normal control inputs.
A ground adjustable trim tab is installed on the right aileron to provide
small adjustments in neutral trim. This tab is factory set and does not
normally require adjustment.
An electric motor changes the neutral position of a spring cartridge
attached to the left actuation pulley in the wing. A conical trim button
located on top of each control yoke controls the motor. Moving the
switch left will initiate left-wing-down trim and moving the switch right
will initiate right-wing-down trim. Neutral trim is indicated by the
alignment of the line etched on the control yoke with the centering
indication marked on the instrument panel. The aileron trim also
provides a secondary means of aircraft roll control in the event of a
failure in the primary roll control system not involving jammed ailerons.
Aileron trim operates on 28 VDC supplied through the 2-amp ROLL
TRIM circuit breaker on ESS BUS 2.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-11
Figure 7-2
Aileron System
SR22_FM07_1462
March 2010
7-12 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Rudder System
The rudder provides airplane directional (yaw) control. The rudder is of
conventional design with skin, spar and ribs manufactured of
aluminum. The rudder is attached to the aft vertical stabilizer shear
web at three hinge points and to the fuselage tailcone at the rudder
control bell crank.
Rudder motion is transferred from the rudder pedals to the rudder by a
single cable system under the cabin floor to a sector next to the
elevator sector pulley in the aft fuselage. A push-pull tube from the
sector to the rudder bell crank translates cable motion to the rudder.
Springs and a ground adjustable spring cartridge connected to the
rudder pedal assembly tension the cables and provide centering force.
Yaw Trim System
Yaw trim is provided by spring cartridge attached to the rudder pedal
torque tube and console structure. The spring cartridge provides a
centering force regardless of the direction of rudder deflection. The
　
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