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Display Unit (CDU), which displays the airplane current position and
track against a moving map. The EX-Series MFD can perform the
following functions:
• Generate and display a moving map based on GPS position
data with obstacle and terrain data.
• Display Stormscope lightning strike bearing and distance.
• Display Skywatch traffic advisory information. (EX5000C
only)
• Display a GPS flight plan based on pilot inputs.
• Display Normal and Emergency checklists as well as
performance data.
• Display navigation data, such as groundspeed and track.
The pilot can configure the moving map display. Some of its
configuration features are:
• Select Track-up or North-up modes.
• Select map scale.
• Select terrain features, such as airports and special use
airspace and select color enhanced terrain.
• Select and view trip data from GPS.
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Information Manual 7-69
Cirrus Design Section 7
SR20 Airplane Description
Power for the MCU is 28 VDC supplied through the 5-amp MFD circuit
breaker on the Avionics Non-Essential Bus.
• Note •
Serials 1005 through 1472 before MFD software version 530-
00162-000 Revision 02; Do not use the Garmin 420 or 430
Navigators to display Stormscope lightning data when the
Avidyne MFD’s Lightning mode is set to either DATALINK or
OFF. For the Garmin 420 or 430 Navigators to accurately
display lightning strikes, the Lightning mode selected on the
MFD’s MAP Page, must be set to either STRIKE or CELL.
Refer to Avidyne FlightMax EX5000C Pilot’s Guide, for a more
complete description of the MFD, its operating modes, and additional
detailed operating procedures.
March 2010
7-70 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Autopilot
The airplane may be equipped with the standard S-TEC System
Twenty Autopilot, an optional S-TEC System Thirty Autopilot, or an
optional S-TEC System 55X autopilot. Refer to the applicable FAA
Approved Airplane Flight Manual Supplement and the applicable
Pilot's Guide for additional description as well as specific limitations
and operating procedures for the SR20.
S-TEC System 20 Autopilot (Standard)
The standard SR20 is equipped with an S-TEC System Twenty
Autopilot. This single-axis autopilot system is a rate-based system,
deriving roll axis control inputs from its electric turn coordinator. The
programmer, computer, annunciators, and servo amplifier are
contained entirely within the turn coordinator case. Pilot inputs to the
autopilot are made through the multi-function control knob at the upper
left corner of the turn coordinator. The control knob provides mode
selection, disengage, and turn command functions. The turn
coordinator instrument annunciates system modes. The autopilot may
be disengaged using either the multi-function control knob or by
pressing down on the trim switch on either control yoke handle. The
autopilot drives the aileron trim motor and spring cartridge to control
airplane roll. 28 VDC for autopilot operation is supplied through the 5-
amp AUTOPILOT circuit breaker located on Main Bus 1.
The S-Tec System Twenty Autopilot features:
• Roll Stabilization.
• Turn Command.
• Heading Hold interfaced with DG coupled heading bug.
• NAV/LOC/GPS tracking, HI and LO sensitivity.
S-TEC System 30 Autopilot (Optional)
The optional S-TEC System Thirty Autopilot is a two-axis autopilot
system receives roll axis control inputs from an integral electric turn
coordinator and altitude information from an altitude transducer
plumbed into the static system. The programmer, computer/amplifier,
and annunciators are contained entirely within the turn coordinator
case. Pilot inputs to the autopilot are made through the Multi-function
Control Knob at the upper left of the turn coordinator, through the
Altitude Hold switches on the control yoke handles, and the trim
March 2010
Information Manual 7-71
Cirrus Design Section 7
SR20 Airplane Description
control switches on the control yoke handles. The control knob
provides mode selection, disengage, and turn command functions.
The autopilot makes roll changes through the aileron trim motor and
spring cartridge and makes pitch changes for altitude hold through the
pitch trim motor and spring cartridge. 28 VDC for autopilot operation is
supplied through the 5-amp AUTOPILOT circuit breaker located on
Main Bus 1.
The S-Tec System Thirty Autopilot features:
1. Roll Stabilization.
2. Turn Command.
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西锐20飞机信息手册 SR22 AIRPLANE INFORMATION MANUAL 1148-126(73)
