Boris Sergeyevich Stechkin (1891–1969) was Russian scientist, engineer and inventor. He developed a theory of heat engines and was involved in construction of many Soviet aircraft engines. He was also co-developer of Sikorsky Ilya Muromets (the first four-engine airplane and bomber, 1913) and Lebedenko's Tsar Tank (the largest armored vehicle in history, 1916-1917).
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