Claim: Two of Robert Ludvigovich Bartini's aircraft designs are A-55, a Medium-range bomber flying boat, and the A-57, an experimental Soviet bomber of the mid-1950s that was designed to take off almost anywhere.
Evidence: (Draft) Jet-powered flying boat strategic bomber with a range of 14,000 kilometers (8,700 mi) (1957) A-57 
In 1968, Bartini returned to Taganrog to specifically develop seaplanes, where began development of his last known project, the Bartini Beriev VVA-14, an experimental ekranoplan featuring vertical takeoff intended to be used in anti-submarine warfare against American submarines armed with Polaris missiles.