Sergey Ulyanin

Russian aerospace engineer

Sergey Alekseevich Ulyanin (Russian: Серге́й Алексе́евич Улья́нин, (25 September [O.S. 13 September] 1871, Moscow — 13 October 1921, London) was a Russian aircraft designer and military pilot, a pioneer of military use of aerial photography and commander of the Russian Air Force in 1917-1918.