Empennage; Flight Controls; Elevator System - Cirrus SR22 Pilot Operating Handbook

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ECTION IRPLANE AND
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LIGHT ONTROLS
in a C-section, and is continuous from wing tip to wing tip. The wing spar
passes under the fuselage below the two front seats and is attached to the
fuselage in two locations. Lift and landing loads are carried by the single
carry-through spar, plus a pair of rear shear webs (one on each wing)
attached to the fuselage.

Empennage

The empennage consists of a horizontal stabilizer, a two-piece elevator, a
vertical fin and a rudder. All of the empennage components are conven-
tional spar (shear web), rib, and skin construction.
The horizontal stabilizer is a single composite structure from tip to tip. The
two-piece elevator, attached to the horizontal stabilizer, is aluminum.
The vertical stabilizer is composite structure integral to the main fuselage
shell for smooth transfer of flight loads. The rudder is aluminum and is
attached to the vertical stabilizer rear shear web at three hinge points.

Flight Controls

The airplane uses conventional flight controls for ailerons, elevator and
rudder. The control surfaces are pilot controlled through either of two
single-handed side control yokes mounted beneath the instrument panel.
The location and design of the control yokes allow easy, natural use by the
pilot. The control system uses a combination of push rods, cables and bell
cranks for control of the surfaces.

Elevator System

The two-piece elevator provides airplane pitch control. The elevator is of
conventional design with skin, spar and ribs manufactured of aluminum.
Each elevator half is attached to the horizontal stabilizer at two hinge points
and to the fuselage tailcone at the elevator control sector. Elevator motion
is generated through the pilot's control yokes by sliding the yoke tubes
forward or aft in a bearing carriage. A push-pull linkage is connected to a
cable sector mounted on a torque tube. A single cable system runs from the
forward elevator sector under the cabin floor to the aft elevator sector
pulley. A push-pull tube connected to the aft elevator sector pulley trans-
mits motion to the elevator 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
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S
YSTEMS
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IRRUS ESIGN
SR22
P/N 13772-006
Reissue A