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displayed when the active NAVAID is received.
The HSI heading reference bug is set using the heading selection
knob on the Flight Management System Keyboard. The selected
heading is displayed in a window above the upper LH 45° index mark
and will disappear approximately 3 seconds after the heading
selection knob stops turning.
The Course Deviation Indicator (CDI) navigation source shown on the
HSI is set using the CDI softkey to select GPS, NAV1, or NAV2 inputs.
The course pointer is set using the course selection knob on the Flight
Management System Keyboard. The selected course is displayed in a
window above the upper RH 45° index mark and will disappear
approximately 3 seconds after the heading selection knob stops
turning.
Vertical Speed Indicator
Vertical Speed data is provided by the Air Data Computer and is
shown as a vertical tape along the right side of the altimeter on the
PFD. The VSI scale is graduated with major tick marks at 1000 and
2000 fpm in each direction and minor tick marks at intervals of 500 feet
The vertical speed pointer moves up and down the fixed VSI scale and
shows the rate of climb or descent in digits inside the pointer. A
reference notch at the RH edge of the scale indicates 0 feet/min.
Vertical speed must exceed 100 feet/min before digits will appear in
the VSI pointer. If the rate of ascent/descent exceeds 2000 fpm, the
pointer appears at the corresponding edge of the tape and the rate
appears inside the pointer.
Magnetic Compass
A conventional, internally lighted, liquid filled, magnetic compass is
installed on the cabin headliner immediately above the windshield. A
compass correction card is installed with the compass.
March 2010
7-22 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Wing Flaps
The electrically controlled, single-slotted flaps provide low-speed lift
enhancement. Each flap is manufactured of aluminium and connected
to the wing structure at three hinge points. Rub strips are installed on
the top leading edge of each flap to prevent contact between the flap
and wing flap cove. The flaps are selectively set to three positions: 0%,
50% (16°) and 100% (32°) by operating the FLAP control switch. The
FLAP control switch positions the flaps through a motorized linear
actuator mechanically connected to both flaps by a torque tube.
Proximity switches in the actuator limit flap travel to the selected
position and provide position indication.
The wing flaps and control circuits are powered by 28 VDC through the
10-amp FLAPS circuit breaker on the NON ESS BUS.
Flap Control Switch
An airfoil-shaped FLAPS control switch is located at the bottom of the
vertical section of the center console. The control switch is marked
and has detents at three positions: UP (0%), 50% and 100%. The
appropriate VFE speed is marked at the Flap 50% and 100% switch
positions. Setting the switch to the desired position will cause the flaps
to extend or retract to the appropriate setting. An indicator light at each
control switch position illuminates when the flaps reach the selected
position. The UP (0%) light is green and the 50% and 100% lights are
yellow.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-23
Figure 7-6
Wing Flaps
SR22_FM07_2935A
March 2010
7-24 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Landing Gear
Main Gear
The main landing gear are bolted to composite wing structure between
the wing spar and shear web. The landing gear struts are constructed
of composite material for fatigue resistance. The composite
construction is both rugged and maintenance free. The main wheels
and wheel pants are bolted to the struts. Each main gear wheel has a
15 x 6.00 x 6 tire with inner-tube installed. Standard wheel pants are
easily removable to provide access to tires and brakes. Access plugs
in the wheel pants can be removed to allow tire inflation and pressure
checking. Each main gear wheel is equipped with an independent,
hydraulically operated single cylinder, dual piston, disc brake.
Nose Gear
The nose gear strut is of tubular steel construction and is attached to
the steel engine mount structure. The nosewheel is free castering and
can turn through an arc of approximately 216 degrees (108 degrees
either side of center). Steering is accomplished by differential
application of individual main gear brakes. The tube-type nosewheel
tire is 5.00 x 5.
Brake System
The main wheels have hydraulically operated, single-disc type brakes,
　
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