Avidyne DFC100 Manual

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1-2 System Overview
DFC100 Digital Autopilot | PILOT GUIDE
TABLE OF CONTENTS
1System Overview ..............................................................1-2
FUNCTIONAL OVERVIEW ..........................................................1-3
GENERAL AUTOPILOT OPERATIONS.......................................1-4
Basic Autopilot Operation......................................................................1-4
Capture And Hold Operation.................................................................1-4
Target (Bug) Setting..............................................................................1-4
Aural Alerts...........................................................................................1-5
Armed vs Engaged Mode Indications....................................................1-6
Mode Transition Indication....................................................................1-6
Manual Electric Trim Disconnect...........................................................1-7
Envelope Protection..............................................................................1-8
Full-Time Envelope Alerting..................................................................1-9
Barometer Setting Adjustment ............................................................1-12
Engagement and Hold limits ...............................................................1-13
Comparators.......................................................................................1-14
Autopilot Engagement.........................................................................1-15
Autopilot Disengagement....................................................................1-15
FD vs. AP ...........................................................................................1-16
PFD Annunciations.............................................................................1-17
2Normal Startup Sequence................................................2-2
POWER CONSIDERATIONS.......................................................2-2
SELF-TEST/ALIGNMENT ............................................................2-2
BRIGHTNESS CONTROLS .........................................................2-2
PRE-FLIGHT TEST......................................................................2-3
BEFORE TAKEOFF TECHNIQUES.............................................2-4
3Climb-out/Enroute.............................................................3-2
NORMAL OPERATING MODES..................................................3-2
Pitch Mode............................................................................................3-2
Roll Mode .............................................................................................3-2
Vectors (HDG) Mode ............................................................................3-3
Navigation (NAV) Mode ........................................................................3-4
Altitude Hold (ALT) Mode......................................................................3-5
Indicated Airspeed (IAS) Hold Mode.....................................................3-5
Vertical Speed (VS) Hold Mode ............................................................3-6
VNAV Mode..........................................................................................3-7
Altitude Capture Mode........................................................................3-10
Straight and Level...............................................................................3-12
Pilot Selectable Intercepts...................................................................3-13
Control Wheel Steering Mode.............................................................3-14
Take off/Go Around (TO/GA) Mode.....................................................3-15
4Approach Procedures ......................................................4-2
GENERAL BEHAVIOR.................................................................4-2
APPROACH MODES ...................................................................4-2
WAAS Approaches...............................................................................4-2
Non-WAAS GPS approach (RNAV or Overlay or LNAV).......................4-5
VOR approach......................................................................................4-5
Localizer approach................................................................................4-6
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ILS approach including glide slope intercept .........................................4-7
Procedure Turn ILS or Localizers..........................................................4-8
Back course approaches.......................................................................4-9
Missed Approach................................................................................4-10
Take off/Go Around (TO/GA) Mode.....................................................4-11
5Abnormal Procedures ......................................................5-2
GENERAL FAILURE MODE INFORMATION...............................5-2
OTHER ERROR MODES.............................................................5-5
ALERTS........................................................................................5-7
LOSS OF ENGINE .....................................................................5-10
6Limitations and Performance ..........................................6-2
LIMITATIONS...............................................................................6-2
SOFTWARE COMPATABILITY AND NOTES..............................6-4
GENERAL PERFORMANCE – CIRRUS AIRCRAFT...................6-5
PERFORMANCE IN PITCH TRIM-ONLY AIRCRAFT..................6-6
PERFORMANCE IN NON-CIRRUS AIRCRAFT...........................6-6
Index............................................................................................1
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System Overview 1-1
1System Overview ..............................................................1-2
FUNCTIONAL OVERVIEW ..........................................................1-3
GENERAL AUTOPILOT OPERATIONS.......................................1-4
Basic Autopilot Operation......................................................................1-4
Capture And Hold Operation.................................................................1-4
Target (Bug) Setting..............................................................................1-4
Aural Alerts...........................................................................................1-5
Armed vs Engaged Mode Indications....................................................1-6
Mode Transition Indication....................................................................1-6
Manual Electric Trim Disconnect...........................................................1-7
Envelope Protection..............................................................................1-8
Full-Time Envelope Alerting..................................................................1-9
Barometer Setting Adjustment ............................................................1-12
Engagement and Hold limits ...............................................................1-13
Comparators.......................................................................................1-14
Autopilot Engagement.........................................................................1-15
Autopilot Disengagement....................................................................1-15
FD vs. AP ...........................................................................................1-16
PFD Annunciations.............................................................................1-17
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1-2 System Overview
1 System Overview
This manual assumes that the pilot is appropriately licensed, is
proficient in operation of the aircraft and its equipment, and is in
compliance with all Federal Aviation Regulations (FARs).
All images contained in this manual are for reference use only,
and are subject to change.
Avidyne strongly recommends that pilots use the DFC100 system
only under VFR conditions until completely familiar with its
operation and use.
Boxed areas marked as NOTE within this manual identify certain
situations or areas of operation having safety implications. While
it is important for the operator to be familiar with all of the
information in the manual, it is essential to the safe use of the
DFC100 that pilots give careful attention to the material contained
within these NOTEs.
Boxed areas marked as WARNING within this manual identify
certain situations or areas of operation having unique and
heightened safety implications.
In order to avoid a diversion of attention from the task of safely
taxiing, pilots should avoid performing the described cockpit tasks
while the aircraft is in motion during taxi.
It remains the pilot’s duty to monitor the autopilot for proper
function upon activation and during use.
Internal DFC100 data logs are property of Avidyne.
DFC 100 Digital Flight Control Panel

System Overview 1-3
FUNCTIONAL OVERVIEW
The Avidyne DFC100 autopilot supports the following functions:
•Flight Director
•Heading Capture/Hold
•NAV Tracking
•Vectors Mode
•VNAV Tracking
•Approach Mode (includes LOC, ILS, VOR, BC, LPV,
LNAV/VNAV, LNAV+V)
•Altitude Hold
•Altitude Capture
•Vertical Speed Hold
•Indicated Airspeed Mode
•Straight and Level
•Pilot Selectable Intercept Angles
•Control Wheel Steering (not available in all aircraft)
•Takeoff/Go Around (TO/GA) Mode (not available in all
aircraft)
•Speed-based Envelope Protection
•Full-time Envelope Alerting
NOTE
Envelope Protection vs. Envelope Alerting
There is a distinction between Envelope Protection
and Full-time Envelope Alerting. Envelope
Protection will result in active driving of the flight
control surfaces by the autopilot. Full-time
Envelope Alerting will only provide visual and aural
alerting but it is up to the pilot to manually make any
control surface changes.
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1-4 System Overview
GENERAL AUTOPILOT OPERATIONS
NOTE
Avoid Pilot Flight Control Input In AP
The pilot should not make any input to the flight
controls while the autopilot is engaged.
BASIC AUTOPILOT OPERATION
The DFC100 autopilot always has both a lateral and vertical
mode active when engaged. If a specific lateral mode has not
been selected by the pilot, then the system defaults to Roll Hold
mode. If a specific vertical mode has not been selected by the
pilot, then the system defaults to Pitch Hold mode.
CAPTURE AND HOLD OPERATION
A single button press will typically engage the mode pressed and
arm a logical choice that will capture if the capture criteria are
met. For example, pressing IAS or VS will hold the indicated or
vertical speed and arm altitude. Another example is pressing the
HDG button will engage heading mode and arm NAV mode (if
Primary Nav LSK is set to FMS).
If you want the autopilot to remain in the selected mode (e.g. stay
in IAS mode and not capture altitude even if the aircraft flies
through the altitude bug setting), press the desired button (IAS in
this example) a second time to disarm the capture. The blue
armed indicator (ALT in this example) on the autopilot and the
PFD page will extinguish.
TARGET (BUG) SETTING
The primary location for setting both the IAS and VS targets are
via the dedicated knobs on the autopilot control head.
The primary location for setting the HDG and ALT targets are via
the dedicated knobs on the keyboard.
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