The DFC90 offers the functionality formerly only available to autopilots found on turboprops and jets. The GFC700 also has this capability, but is not available for retro fit to any aircraft separate from the G1000 system. As a result of these outputs the DFC90 can control the aircraft with accuracy and stability not found before in previous autopilots. The AHRS system produces an more accurate and stable output than in previous analog attitude systems which relied on output voltage to drive the Flight Director and Auto Pilot.
#Stec 50 autopilot review pro#
These AHRS systems are embedded in the Avidyne Entegra or Aspen Pro PFD. It is an attitude based autopilot system which utilized the inputs from the ADAHRS (Air Data and Attitude Heading Reference System). The DFC90 was made available to the PA46-350P Mirage (Avidyne or Aspen equipped). Enter the glass revolution and now more and more aircraft have AHRS (Attitude Heading Reference System) which provide a much more stable attitude reference to the autopilot. The downside to the attitude based systems is that they relied on inputs from a mechanical indicator. Does this mean that the STEC 55 could not handle the Mirage, the answer is no but the attitude systems are more responsive and seem less prone to deviations. Attitude based autopilot system are generally more responsive than rate based systems. This was a departure from the previous attitude based system. In 2000 the Mirage was given the STEC 55 autopilot to replace the KFC225. Of course there is no replacement for that moving map every pilot has between the ears, a pilot’s ability to visualize his position is extremely important to becoming a safe pilot especially when operating in the IFR environment. Over the years as technology has increased greatly, and in the last four or five years at a breakneck speed, the new innovations in avionics have greatly increased safety and when used properly can increase situational awareness. During that time I have had the opportunity to fly behind many different autopilots. Over the years I have had the pleasure of flying and providing instruction in a number of aircraft. Feature Rich Autopilot to Compete with GFC 700
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