. "1"^^ . . "The Polikarpov TB-2 (Russian: \u041F\u043E\u043B\u0438\u043A\u0430\u0440\u043F\u043E\u0432 \u0422\u0411-2) was a Soviet heavy bomber prototype designed and tested in the 1920s. It was a wooden-construction sesquiplane with engines mounted on the bottom wing. Work on the sole prototype began in 1927 and it was tested in 1930. Although TB-2 performance was superior to that of the Tupolev TB-1 in service at the time, it was deemed insufficient for 1930 and the project was abandoned."@en .