Texas-based S-TEC has introduced a series of single- and two-axis autopilots for kitplane owners and other general-aviation users. The S-TEC System Twenty is a roll-axis flight-control system, providing roll stability, turn-command capability, heading preselect and heading hold, as well as en route and approach-navigation tracking.
Extras on the S-TEC System Thirty include heading hold and out-of-pitch trim annunciation. The company has also developed an altitude-hold-only autopilot, aimed at pilots wishing to upgrade from a roll-axis autopilot.
Source: Flight International