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SR20 Airplane Description
Airspeed Indicator
• Note •
Serials 1337 and subsequent: The standby airspeed indicator
is mounted on the LH bolster panel and shows only indicated
airspeed.
Indicated and true airspeeds are indicated 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.
Vertical Speed Indicator
• Note •
Serials 1337 and subsequent: The Vertical Speed Indicator is
integrated into the PFD.
Airplane rate of climb or descent in feet per minute is displayed on the
internally lit Vertical Speed indicator installed in the pilot's instrument
panel. The instrument senses rate of change in static pressure from a
reference pressure and displays the result in climb or descent feet per
minute (FPM). Climb is indicated by clockwise rotation of the pointer
from zero and descent is indicated by counter clockwise rotation. The
'0' (zero) reference point is at the 9 o'clock position. The scale is
calibrated from 0 to 2000 FPM in 100-FPM increments in both the 'UP'
and 'DOWN' directions.
March 2010
7-28 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Altimeter
• Note •
Serials 1337 and subsequent: The standby altimeter is
mounted on the LH bolster panel.
Airplane altitude is depicted on a conventional, three-pointer, internally
lit barometric altimeter installed in the pilot's instrument 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.
Turn Coordinator
• Note •
Serials 1337 and subsequent: Turn Coordinator function and
roll data display is integrated into the PFD.
Avionics Configuration 2.0 and 2.1:
The electric turn coordinator displays roll information and provides roll
data to the integral autopilot system (System 20 or System 30) Roll
rate is sensed by a single-gimbal, electric-powered gyro and displayed
on the face of the instrument. The display consists of a symbolic
airplane rotates to indicate turn rate and a standard glass tube and
ball inclinometer. Markings, labeled L & R, indicate roll for a standard
rate turn in the direction indicated. Redundant circuits paralleled
through diodes at the indicator supply DC electrical power. 28 VDC for
roll rate gyro operation is supplied through the 2-amp TURN COORD
1 circuit breaker on the Essential Bus and the 2-amp TURN COORD 2
circuit breaker on the Main Bus 2.
March 2010
Information Manual 7-29
Cirrus Design Section 7
SR20 Airplane Description
Avionics Configuration 2.2:
The electric turn coordinator, installed in the instrument panel, displays
roll information and provides roll data to the System 55X autopilot. The
instrument and power supplies are as described above.
Directional Gyro
Avionics Configuration 2.0:
The airplane is equipped with a directional gyro in the standard
configuration. If a directional gyro is not installed the airplane will be
equipped with an HSI.
The directional gyro, in the left instrument panel, displays airplane
heading by rotating a compass dial in relation to a fixed simulated
airplane image and lubber line. The compass dial rotates counter
　
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