Centers the roll rate voltage when the aircraft is perfectly level and stationary.
The unit is designed for standard radio stack mounting. The manual specifies the "keep-out" zones to avoid electromagnetic interference (EMI) from other avionics, like high-power COM radios. Servo Installation This is the most labor-intensive part of the manual.
Install a dedicated, pull-type autopilot circuit breaker (typically 5-Amp for 14V systems or 3-Amp for 28V systems). S-tec 55x Installation Manual
The installation requires a main wire harness kit. It is critical to use the correct gauge wire, shielded cables where necessary (especially for audio and sensitive analog signals), and properly crimped pins to ensure a reliable connection.
By following the guidelines and best practices outlined in this article and the S-tec 55x installation manual, you can ensure a successful installation and enjoy the benefits of the S-tec 55x autopilot system. Centers the roll rate voltage when the aircraft
Engage Altitude Hold (ALT) mode. Gently push forward on the control yoke; the optional trim wheel should automatically run in the "Nose Up" direction to compensate. Pull back on the yoke; the trim should run "Nose Down."
: This system is rate-based and requires a compatible S-TEC turn coordinator to function as the primary sensor. 🛠️ Component Overview The typical installation includes: Servo Installation This is the most labor-intensive part
Using a tensiometer, technicians must verify the servo slip-clutch settings. This ensures the pilot can "overpower" the autopilot in an emergency.
A formal sign-off stating the system was installed in accordance with the S-TEC 55X Installation Manual, ground tested, and found airworthy.
Connect the computer, transducer, and servos based on the wiring diagrams.