Link 1 with wheel a turns about fixed axis A of the aircraft frame member. Link 2 is connected by turning pairs B and C to links 1 and 3. Link 3 turns about fixed axis D of the aircraft frame. Links 6 and 7 are of equal length; they are connected together by turning pair F and to links 2 and 3 by turning pairs E and G. Piston rod 5 of retracting cylinder 4 is connected by turning pairs F to links 6 and 7. Cylinder 4 is connected by turning pair H to link 3. When piston rod 5 moves into retracting cylinder 4, link 1 is turned counterclockwise and link 3 clockwise, and the landing gear is retracted as shown by the dash lines.
$1425$LG,AL$