Want to purchase a S-Tec 55X Autopilot

[kilr4d]

Originally Posted by n86121

What are the autopilot upgrade/replacement suggestions....?

What have people installed recently? Any new ones? Installed price ballpark?

The only realistic choices right now are Stec 55X or Stec 60-2. Once you add in the options for 3 axis and auto trim these are $30K PLUS LABOR...at lot of labor. Factor in the removal of your old system, the usual panel upgrades and a few hidden snags. Budget $50K to be safe...

Originally Posted by n86121

I still have a Nav-O-Matic 400B.

As a practical matter, the 337 is so stable it never use it. If I do, the only functions used are altitude and heading hold. Just turn the heading knob until the little arrow on my GPS points to my next fix (usually destination), then HOLD. Done.

The 400B is actually a GREAT autopilot. If your autopilot holds heading and altitude you've got a very decent starting point.

I recommend reaching out to Bob Weber at Webair Consulting http://www.webairconsulting.com/ Bob Weber helped me diagnose a bunch of stuff and get my servos centered up. Bob is a great guy and also gave me a good understanding of how my autopilot works.

Some roll and pitch issues persisted so Bob had me remove the autopilot control head and the autopilot computer and send them to Jake Kinsey at Bevan Aviation in Wichita. They IRAN'd both computers and fixed a bunch of issues for less than $1k. https://bevanaviation.com/

My autopilot components will be back by mid next week and I'll follow up on the forum once the A&P has reinstalled them.