Link 1 with wheel a turns about fixed axis D of the aircraft frame member. Link 2 is connected by turning pairs C and B to links 1 and 3. Link 3 turns about fixed axis A of the aircraft frame. Piston rod 5 of retracting cylinder 4 is connected by turning pair E to link 3. Cylinder 4 turns about fixed axis F of the aircraft frame. When piston rod 5 moves out of retracting cylinder 4, link 1 is turned counterclockwise and link 3 clockwise, and the landing gear is retracted as shown by the dash lines.
$1423$LG,AL$