There are roll or lateral or horizontal modes and pitch or vertical modes.
Roll steering autopilot.
Since the s tec is a rate sensing ap anyway its well qualified to fly using the rate of turn created by the gps without need for gyro input.
While a two axis autopilot can control roll and pitch it takes additional circuitry to couple the roll so it steers as desired or the pitch to desired altitude behavior.
Affordable gps roll steering for general aviation the gpss interfaces with the composite roll steering commands output by gps navigators to fly a complete pre programmed flight plan hands off.
So let s apply some autopilot basics to help us better understand what happened before proceeding to my originally intended subject gpss or roll steering autopilots use servos to translate electrical energy into mechanical outputs to fly the airplane.
If the gps database includes instrument approach procedures the flight plan can also include an approach to the destination airport.
Gps roll steering lets you program a complete flight plan into your gps.
Modes allow you to select this coupling.
Of course not all autopilots are coupled to all sources.
System 50x and 40x.
After several phone calls the aircraft was on its way back to the autopilot shop.
It even anticipates the turn based on your ground speed and distance to the waypoint.
And then with the push of a button the autopilot follows your flight plan turn by turn.