FIELD: aeronautical engineering; control of aircraft in back-up mode. SUBSTANCE: control device has main command input 2 which is connected with pilot's control lever, additional command input 4 which is connected with automatic control device 5 and converter 6 with control spool valve which is connected with delivery hydraulic line 9, return hydraulic line 10 and command hydraulic lines 11 and 12. End chambers of spool valve are flow-through. Additional command input is rigidly connected with control spool valve of converter 8 engageable with pilot's control lever 3 through spring 6. Geometric sizes of end beads of spool valve are selected on condition of equality of axial force at spool valve in case of pressure differential in end chambers force of automatic device 5. EFFECT: enhanced reliability. 2 dwg
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