ENGAGEMENT OF ALTITUDE HOLD MODE IN AIRCRAFT FLIGHT CONTROL SYSTEM

摘要

An altitude hold mode is engaged responsive to a sensor of aircraft rate of altitude change and a control wheel force sensor when the rate of altitude change drops below a predetermined threshold value, and simultaneously therewith the pitch command force of the control wheel drops below a predetermined threshold value. The altitude hold mode is disengaged responsive exclusively to the control wheel force sensor when the pitch command force again rises above the predetermined threshold value.