HELICOPTER CONTROL SYSTEM AND CONTROL SYSTEM LINKAGE EXPANSION TIE Russian patent published in 2014 - IPC B64C13/12 

FIELD: aircraft engineering.

SUBSTANCE: proposed system comprises ties and rockers of the main linkage with controls at pilot and operator workstations. Every control channel in linkage to operator workstation accommodates one air operated expansion tie. The latter comprises working air cylinder body, rod with working piston and unions to feed pressure into cylinders. Air cylinder retains expansion tie working piston relative to said body. Locking air cylinder body is connected from outside radially to extension tie working air cylinder body. Working air cylinder through rod one as-extended end interacts with circular groove made in extension tire working piston body. Rod opposite end is connected with mechanical retainer is composed by spring-loaded ball. The latter fits in two circular grooves made in through rod body for its mechanical locking in extended and retracted positions at no-pressure condition in locking air cylinder working chamber.

EFFECT: compact design, serviceability at faulty helicopter air-operated system.

4 cl, 7 dwg