Zveno project ( en.wikipedia.org )
Zveno (Russian: Звено, a military unit "Flight") was a parasite aircraft developed in the Soviet Union during the 1930s. It was the brainchild of the aviation engineer Vladimir Vakhmistrov. It consisted of a Tupolev TB-1 or a Tupolev TB-3 heavy bomber mothership and two to five fighters. Depending on the variant, the...