Cirrus Design
Section 7
SR22T
Systems Description
P/N 13772-005
7-19
P/N 13772-005
7-19
Airspeed Indicator
Primary airspeed data is provided by the Air Data Computer and is
shown as a vertical tape along the upper left side of the PFD. The
airspeed scale is graduated with major tick marks at intervals of 10
knots and minor tick marks at intervals of 5 knots. Speed indication
starts at 20 knots, with 56 knots of airspeed viewable at any time. The
actual airspeed is displayed inside the black pointer. The pointer
remains black until reaching the never-exceed speed (V
NE
), at which
point it turns red. Color coded bars are provided to indicate flap
operating range, normal operating range, caution range, and never-
exceed 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.
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