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actual airspeed is displayed inside the black pointer. The pointer
remains black until reaching the never-exceed speed (VNE), at which
point it turns red. Color coded bars are provided to indicate flap
operating range, normal operating range, caution range, and neverexceed
speed. Speeds above the never-exceed speed, appear in the
high speed warning range, represented on the airspeed tape by red/
white “barber pole” coloration. Calculated true airspeed is displayed in
window at the bottom edge of the airspeed tape. Airspeed trend is also
displayed as a bar along side of the airspeed tape.
Standby Airspeed Indicator
The standby airspeed indicator is mounted on the LH bolster panel
and displays indicated and true airspeeds on a dual-scale, internally lit
precision airspeed indicator installed in the pilot's instrument panel.
The instrument senses difference in static and Pitot pressures and
displays the result in knots on an airspeed scale. A single pointer
sweeps an indicated airspeed scale calibrated from 40 to 220 knots.
The 'zero' index is at the 12 o'clock position. A sub-scale aligns true
airspeed with the corresponding indicated airspeed when the altitude/
temperature correction is set in the correction window. A knob in the
lower left corner of the instrument is used to rotate the pressure
altitude scale in the correction window to align the current pressure
altitude with the outside air temperature.
March 2010
7-20 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
Altimeter
Primary altitude data is provided by the Air Data Computer and is
shown as a vertical tape along the upper right side of the PFD. The
altimeter scale is graduated with major tick marks at intervals of 100
feet and minor tick marks at intervals of 20 feet. Six hundred (600) feet
of barometric altitude is viewable at any time.
The local barometric pressure is set using the barometric adjustment
knob on the PFD. The selectable altitude reference bug is displayed on
the altimeter tape and is set using the altitude selection knob on the
Flight Management System Keyboard. Barometric minimum descent
altitude (MDA, or Decision Height, DH), can be preset. Altimeter trend
is also displayed as a bar along side of the altimeter tape.
Standby Altimeter
Airplane altitude is depicted on a conventional, three-pointer, internally
lit barometric altimeter installed on the LH bolster panel. The
instrument senses the local barometric pressure adjusted for altimeter
setting and displays the result on the instrument in feet. The altimeter
is calibrated for operation between -1000 and 20,000 feet altitude. The
scale is marked from 0 to 10 in increments of 2. The long pointer
indicates hundreds of feet and sweeps the scale every 1000 feet (each
increment equals 20 feet). The short, wide pointer indicates thousands
of feet and sweeps the scale every 10,000 feet (each increment equals
200 feet). The short narrow pointer indicates tens of thousands feet
and sweeps from 0 (zero) to 2 (20,000 feet with each increment equal
to 2000 feet). Barometric windows on the instrument's face allow
barometric calibrations in either inches of mercury (in.Hg) or millibars
(mb). The barometric altimeter settings are input through the
barometric adjustment knob at the lower left of the instrument.
Horizontal Situation Indicator
The horizontal situation indicator is displayed along the lower center of
the PFD. Heading data is provided by the Attitude and Heading
Reference System (AHRS) and the onboard magnetometers. The HSI
displays a rotating compass card in a heading-up orientation. Letters
indicate the cardinal points and numeric labels occur every 30°. Major
tick marks are at 10° intervals and minor tick marks at 5° intervals.
Reference index marks are provided at 45° intervals around the
compass card. A circular segment scale directly above the rotating
compass card shows half and standard rates of turn based on the
length of the turn rate trend vector.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-21
The HSI presents heading, turn rate, course deviation, bearing, and
navigation source information in a 360° compass-rose format. The HSI
contains a Course Deviation Indicator (CDI) with a course pointer
arrow, a To/From arrow, a sliding deviation bar, and scale. The course
pointer is a single line arrow (GPS, VOR1, and LOC1) or a double line
arrow (VOR2 and LOC2) which points in the direction of the set
course. The To/From arrow rotates with the course pointer and is
　
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