S-TEC Fifty Five X - Autopilot Modes of Operation; System Block Diagram

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1-4 3rd Ed. Sep 30, 06

S–TEC

1.4 Modes of Operation

1.4.1 Roll Axis Control

Heading (HDG) Mode

Used to Turn onto a Selected Heading and Hold it

Navigation (NAV) Mode

Used to Intercept and Track a VOR Course

Navigation Approach (NAV APR) Mode

Used to Intercept and Track a LOC and VOR Front Course Inbound

Reverse (REV) Mode

Used to Intercept and Track a VOR Back Course Inbound

Reverse Approach (REV APR) Mode

Used to Intercept and Track a LOC Back Course Inbound

Navigation Global Positioning System Steering (NAV GPSS) Mode

Used to Laterally Steer along a Course defined by GPS

Control Wheel Steering (CWS) Mode

Used to Simultaneously Hold Turn Rate and Vertical Speed

1.4.2 Pitch Axis Control

Altitude Hold (ALT HOLD) Mode

Used to Hold Altitude

Vertical Speed (VS) Mode

Used to Hold Vertical Speed

Glideslope (GS) Mode

Used to Intercept and Track Glideslope

1.5 Block Diagram

The System Fifty Five X Block Diagram is shown in Fig. 1-1.