From 1931, Soviet Vladimir Vakhmistrov conducted experiments on the Zveno project; up to five fighters of various types were carried by Polikarpov TB-2 and Tupolev TB-3 bombers.
Soviet Vladimir Vakhmistrov conducted experiments on the Zveno project. This was from 1931. Up to five fighters of various types were carried by Polikarpov TB-2-3 bombers. Up to five fighters of various types were carried by Polikarpov TB-Tupolev TB-3 bombers.