S-TEC AUTOPILOT SYSTEM 55X STSYS55X

S-Tec Autopilot System 55X. The S-TEC Autopilot System 55X is a pure rate-based two-axis autopilot offering a smooth precise, dependable performance. Combining the programmer, computer, annunciator, and servo amplifier functions into one compact panel mount unit. System 55X is the first S-Tec autopilot system designed specifically to be integrated into the aircraft radio panel with other avionics. It is also the first S-Tec system to feature control wheel steering.The System 55X roll axis has heading select, VOR/Localizer front and back course intercept and tracking. It can be interfaced with RNAV, GPS, or Loran systems.