Flight Instruments; Attitude Indicator; Airspeed Indicator - Cirrus DESIGN SR20 Information Manual

Section 7
Airplane Description

Flight Instruments

For additional information on instrument limit markings, refer
to Section 2, Limitations.

Attitude Indicator

The attitude gyro gives a visual indication of flight attitude. Bank
attitude is indicated by a pointer at the top of the indicator relative to
the bank scale with index marks at 10°, 20°, 30°, 60°, and 90° either
side of the center mark. A fixed miniature airplane superimposed over
a movable mask containing a white symbolic horizon bar, which
divides the mask into two sections, indicates pitch and roll attitudes.
The upper "blue sky" section and the lower "earth" section have pitch
reference lines useful for pitch attitude control. This indicator is
operable and can follow maneuvers through 360° in roll and 360° in
pitch. A knob at the bottom of the instrument is provided for
adjustment of the miniature airplane to the horizon bar for a more
accurate flight attitude indication. The instrument is vacuum driven and
incorporates a red GYRO flag to indicate insufficient vacuum for
operation. Upon start, the flag pulls when vacuum passes
approximately 4 inches Hg differential. If the vacuum differential
approaches 1 inch Hg, the flag drops into view.

Airspeed Indicator

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 a 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. Refer to Section 2
(Limitations) for instrument limit markings.
7-18
• Note •
Cirrus Design
P/N 13999-002 Info Manual
September 2011
SR20