Control lever 1 is connected by turning pairs B and C to link 6, turning about fixed axis A, and to rod a of piston 2, which reciprocates in fixed cylinder 7. Roller 9, mounted at the end of rod b of piston 4, rolls and slides in slot d of landing flap 5 which turns about fixed axis D. Piston 4 reciprocates in fixed cylinder 3. When control lever 1 is turned clockwise, fluid is delivered into power cylinder 3. This moves piston 4 to the left and its rod b turns landing flaps 5 of the plane. Piston 4 is moved to the right by spring 8.
$3965$LHP,Co$