Aviation's Panel Mount Avionics Installation Leader

The System Twenty is a single-axis roll stabilization autopilot that requires zero additional panel space. The programmer, computer, annunciators, and servo amplifier are entirely contained within the turn coordinator case. Standard functions include heading pre-select, turn command (which will give up to 90% standard rate turn), LO & HI track modes for LOC & NAV, and a gain enhancement feature for tracking GPS navigation analog left / right deviation signals.

To utilize GPS roll steering (GPSS) commands from a compatible GPS, an additional ST-901 GPSS converter may be required. The ST-901 GPSS converter is not required when integrating to an Aspen EFD system or Garmin G500/600 EFIS.

A compatible DG or HSI is required for the heading pre-select function or when adding the optional ST-901 GPSS converter.

Building block concept allows upgrading to a System Thirty or FiftyFiveX two-axis system.

  • 3” panel mounted
  • Internal lighting
  • Roll axis computer entirely within turn coordinator
  • Heading preselect and hold *
  • Turn coordinator in β€œST” roll stabilization mode
  • Low and high gain VOR/LOC/GPS tracking (track only)
  • Manual Electric Trim
  • ST-901 GPSS Converter

  • Turn coordinator/Roll computer
  • Roll servo
  • Pressure Transducer
  • Cable Assemblies
  • Installation/Hardware kit
  • STC Documentation package

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