Link 2 turns about fixed axis A of the aircraft frame member. Link 1 with wheel a is connected by turning pairs B and C to links 2 and 3. Link 3 turns about fixed axis D of the aircraft frame. Piston rod 5 of retracting cylinder 4 is connected by turning pair E to link 3. Cylinder 4 is connected by turning pair F to link 2. When piston rod 5 moves into retracting cylinder 4, links 2 and 3 are turned clockwise, and the landing gear is retracted as shown by the dash lines.
$1443$LG,AL$