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S-TEC System 55X Autopilot

First, I would like to say that I concur with Dave Snodgrass on Mid-America Avionics, they are first class. I had an S-TEC 55X installed in my 1979 Sierra. Prior to installing the 55X, I had an Century IIB. The install took 2.5 weeks and I have been flying with it for approx. 2 weeks.

The GPSS is amazing (linked to my GNS 430). The altitude hold is right on and the vertical speed is also very accurate. I have flown an ILS and VOR approaches fully coupled and they were dead-on (heading & glideslope).

The only other note I have is that Mid-America Avionics has moved from Auburn, IN to Huntington, IN (HHG). I highly recommend this unit and Mid-America.

Submitted by Jack Klute


Thank you for adding to the resources available for your Fellow BAC Members.