Sergei Konstantinovich Tumansky (Russian: ?????ยด? ?????????????? ?????????) (21 May 1901 โ 9 September 1973) was a designer of Soviet aircraft engines and the chief designer in the Tumansky Design Bureau, OKB-300.
He worked in TsIAM (1931โ38 and in 1940), at the aircraft-engine plant N 29, in Leah.
He also worked as a substitute main designer in OKB A.A.