This S-TEC SYSTEM 20 Single-Axis autopilot system is a true, rate-based system, deriving roll axis control inputs from its electric turn coordinator. Rate based autopilots have inherent reliability and performance benefits over attitude-based autopilots. This system requires ZERO additional panel space. Programmer, computer, annunciators and servo amplifier are entirely contained within turn coordinator case. Altitude Hold may be added later. Features: single axis roll stabilization,
turn command, heading hold/heading pre-select when interfaced to DG with heading bug or HSI, NAV/LOC/GPS tracking; high and low sensitivity, smoother flight control than attitude gyro based systems; rate-based design varies bank angles with airspeed.

The S-TEC SYSTEM 30 two axis autopilot combines Altitude Hold with the roll axis functionality of the System 20. It is designed to provide an economical solution for aircraft owners who need Altitude Hold, but don't want the additional functions of pitch command, vertical speed control or GS coupling.

S-TEC SYSTEM 20 and 30

The S-TEC SYSTEM 40 Autopilot is a compact, rate-based, roll stabilization system. Designed specifically for the lower priced piston-powered airplane, this single axis system provides Nav and Heading modes for enroute operation as well as Approach and Reverse (Back Course) modes. System 40 consists of the Programmer/Computer, Turn Coordinator, and roll servo.

The S-TEC SYSTEM 50 Autopilot provides all of the features of System 40, but with the additional feature of altitude hold. The system Programmer/Annunciator/Computer unit utilizes the same roll axis circuitry as System 40, plus an accelerometer for short-term pitch axis stabilization, and automatic interruption of altitude hold in severe turbulence. Pitch axis signal inputs are derived from a reliable solid state absolute pressure transducer and the accelerometer, not the artificial horizon gyro. This provides precise, instantaneous altitude and pitch control data and is independent of the aircraft vacuum system.

S-TEC SYSTEM 50

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. The System 55X Flight Guidance Programmer/Computer converts pilot commands to logic signals for roll and pitch computer functions. Altitude Hold with Altitude Trim.

S-TEC Model 55X

The S-TEC SYSTEM 60-2 rate-based two-axis Flight Control System features vertical speed command and altitude hold, heading select, VOR/Localizer/Glideslope coupling with front and back course intercept and tracking. May be interfaced to any GPS or RNav system that provides standard autopilot outputs. Visual and aural indicators provide annuciation for out-of-trim conditions.

The S-TEC SYSTEM 65 is a pure rate-based system, so bank angles vary with airspeed. The system features a lighted 3" turn coordinator, heading preselect and hold, altitude hold with altitude trim, course intercept capability, dual mode HDG/NAV, VOR/LOC/GS/REV/GPS coupling with three gain levels, VOR/LOC/GS/REV/GPS course deviation and NAV flag warning, vertical speed command and pitch trim annunciation.

S-TEC SYSTEM 65

The Century 41 from Century Flight Systems uses precisely synchronized pitch attitude and altitude hold modes, a pitch modifier, automatic and manual electric trim, and automated preflight testing. Anticipative VOR/LOC/GS capture automatically compensates for ground speed, intercept angle, wind direction, and distance from the station. "Automatic gain reducing soft enroute VOR tracking" means perfectly mannered station passage. When using the go-around mode in dealer installed systems, the pilot has only to press the go-around button, clean up the airplane and add go-around power. The autopilot flies to a calibrated pitch up attitude that is set for the single engine safety speed of the airplane and heads to the pilot preset go-around heading.

The Century 2000 is a modular system that allows features to be added as needed. The complete Century 2000 is a true 3 axis, flight director/autopilot with yaw damper. Its advanced design provides the smoothest, most precise ride possible. The flexible design provides the economy of expandability.

Century 2000

The long list of standard features includes GPS/VOR/LOC/LOC REV coupling, fully automatic Glideslope coupling from above or below, selected angle intercept capability when using an HSI (45 degree intercepts using a DG), altitude hold, voice prompter, attitude hold command, autotrim (manual electric trim), trim prompting and a crisp backlit LCD screen
all housed in a compact 3ATI package, a perfect fit for any panel. The expandable architecture of the Triden Series allows for easy upgrades. Upgrades include vertical speed set with the digital altitude pre-select, single cue V-bar Flight Director and dual sensing Yaw Damper (based on aircraft approval).

Century Triden