If I recall correctly, back in the old Flaming Clifs days of LOMAC, the Kuznetzov had functional retractable chocks for the landing gear when you hit the U key while sitting on one of the launch points, much like the Stennis now. They would pop up and lock you in place while the JBD came up and once you came up to full power, they would retract and off you'd go. I believe that I saw these mentioned in a news letter or some kind of hype literature for the new Kuznetzov a while back.