DFC90 Brochure / Manual

Digital Autopilot
Avidyne’s DFC90
Digital Autopilot
enhances precision
of flight and
improves safety
for your Entegraequipped Cirrus.
The DFC90 adds the precision of an attitude-based flight control system and Avidyne’s
innovative, safety-enhancing Envelope Protection capability.
The DFC90 has all the standard vertical and lateral modes of operation of a turbine-class
autopilot system, including Flight Director (FD), Altitude Hold (ALT), Airspeed Hold (IAS),
Vertical Speed Hold (VS), Heading (HDG), and Navigation (NAV, APPR, LOC/GS, GPSS).
The DFC90 also includes Avidyne’s “Straight & Level” button which overrides all autopilot
modes and levels the aircraft in both pitch and roll for an added measure of safety.
Envelope Protection
For envelope protection, available lift and speed margin are calculated constantly in the
background whenever any mode, including Flight Director modes, are in operation.
As the aircraft approaches stall, the autopilot acts unobtrusively to gradually reduce
maximum bank and Vertical Speed just enough to keep the wing flying, while
annunciating the condition to the pilot. As a result, departure from controlled flight
is prevented with the least obtrusive impact on achieving mission level objectives like navigation, climb or approach. Overspeed is handled similarly, with anticipation and
minimal but effective inputs. In Flight Director modes, all these actions appear as
guidance cues with corrections blended into the "V-bar" commands.
• Width: 6.25" (159mm)
• Height: 1.5" (38mm)
• Depth: 10.6" (279mm)
55 Old Bedford Road
Lincoln, MA 01773
Ph 781.402.7400
Fax 781.402.7597
• 2.02 lbs (0.92 kg)
The DFC90 is a slide-in replacement
for existing rate-based STEC 55X flight
Upgrading to the DFC90 only requires
that your existing EXP5000 PFD be
updated to Release 8.0 (hardware &
software)—no expensive wiring changes
are required. Contact Avidyne or your
local Avidyne-authorized distributor for
more information.
Avionics installations require special skills and test equipment. Avidyne’s limited warranty is valid
only for equipment installed by an Authorized Avidyne Distributor. Avidyne reserves the right to
make changes to product specifications and design features without notice.
Avidyne reserves the right to make changes to product specifications and design features without
notice. Some products may require additional hardware for full feature capability.
©2009 Avidyne Corporation. All rights reserved. AV843 Rev.0 11/09 1,000