Friday, August 5, 2011

L-1011 Autoflight: Speed Command System (22-47/48)

The speed command system is independent of autopilot operation, but may be used with the autopilot.

The speed command system provides automatic control of the throttles and control of the FAST/SLOW speed deviation pointer on both attitude director indicators. The auto throttles and FAST/SLOW pointers are controlled from the Thrust/Heading/Pitch mode panel located on the left edge of the pilots' glare shield. Autothrottle system computer switches are located on the flight control electronics system panel in the pilots' overhead.

the ATS 1 and ATS 2 switches, on the flight control electronics system (FCES) panel, control the output of each speed command computer channel. The switches are normally latched and dark. To turn the system off, unlatch both switches.

With both switches latched and dark, the speed command is indicated fully time by the FAST/SLOW pointer on each attitude director indicator.

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