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Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-5
Introduction
This section provides a basic description and operation of the
standard airplane and its systems. Optional equipment described
within this section is identified as optional.
• Note •
Some optional equipment may not be described in this
section. For description and operation of optional equipment
not described in this section, refer to Section 9, Supplements.
March 2010
7-6 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Airframe
Fuselage
The aircraft’s monocoque fuselage is constructed primarily of
composite materials and is designed to be aerodynamically efficient.
The cabin area is bounded on the forward side by the firewall at
fuselage station 100, and on the rear by the aft baggage compartment
bulkhead at fuselage station 222. Comfortable seating is provided for
four adults. A composite roll cage within the fuselage structure
provides roll protection for the cabin occupants. The cabin and
baggage compartment floors are constructed of a foam core
composite with access to under-floor components.
All flight and static loads are transferred to the fuselage structure from
the wings and control surfaces through four wing attach points in two
locations under the front seats and two locations on the sidewall just
aft of the rear seats.
The lower firewall employes a 20° bevel to improve crashworthiness.
In addition, an avionics bay is located aft of bulkhead 222 and
accessible through an access panel installed on the RH side of the aft
fuselage.
Wings
The wing structure is constructed of composite materials producing
wing surfaces that are smooth and seamless. The wing cross section
is a blend of several high performance airfoils. A high aspect ratio
results in low drag. Each wing provides attach structure for the main
landing gear and contains a 47.25-gallon fuel tank.
The wing is constructed in a conventional spar, rib, and shear section
arrangement. The upper and lower skins are bonded to the spar, ribs,
and aft shear web forming a torsion box that carries all of the wing
bending and torsion loads. The rear shear webs are similar in
construction but do not carry through the fuselage. The main spar is
laminated epoxy/carbon fiber 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.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-7
Empennage
The empennage consists of a horizontal stabilizer, a two-piece
elevator, a vertical fin and a rudder. All of the empennage components
are conventional 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.
March 2010
7-8 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Flight Controls
The aircraft 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 pushpull
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 transmits motion to the elevator
　
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