Балтийский завод
During World War I, he helped design lightweight batteries for submarines. In the late 1920s, after a final attempt to involve the government in producing his aircraft, his interests turned to locomotive design. In August, 1924, working in conjunction with the Baltic Shipyard and the Putilov Plant, he designed the first Russian-made diesel locomotive, the Щэл1. (The Ээл2, a slightly earlier model designed by Yury Lomonosov, was made in Germany).