Sergey Tumansky
# Sergey Tumansky

Sergei Konstantinovich Tumansky (Russian: Серге́й Константинович Туманский; 21 May [O.S. 8 May] 1901 – 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 (1931–38 and in 1940), and at the aircraft-engine plant N 29, in Zaporozhye.

He also worked as a substitute main designer in OKB A.A. Mikulin beginning in 1943.

## Biography

Sergei Tumansky was born in Minsk, the Russian Empire, on May 21, 1901 and died, at age 73, in Moscow, the Soviet Union, on September 9, 1973.

Tumansky was a specialist in the field of mechanics and machine building. He was a corresponding member of the Soviet Academy of Sciences for the department of mechanics and control processes from 26 June 1964, and then academician for the department of mechanics and control processes (machine building) from 26 November 1968. He was awarded different distinctions, among them Lenin Prize, Lenin Order and Hero of Socialist Labour.

## Contributions

Some of the engines he worked on and/or designed include:

* M-75 - Gnome-Rhône 9K Mistral built under license
* M-85 - Gnome-Rhône 14K Mistral Major built under license
* M-86 - higher power version of M-85 with increased supercharging and a higher compression ratio
* Tumansky M-87 - improved M-86 with more power
* Tumansky M-88 - improved M-87 with more power
* Tumansky M-89
* Tumansky M-90 - prototype two-row, 18 cylinder version of M-75; cancelled in 1944 as it was too underpowered and suffered numerous failures
* Tumansky M-92 - prototype development of M-90, 1943
* Tumansky RD-9 - initially known as Mikulin AM-5, renamed to RD-9 when Tumansky took over development
* Tumansky RD-10 - designation given to captured examples and copies of the Junkers Jumo 004
* Tumansky R-11 - a twin-spool, axial-flow non-afterburning turbojet engine
* Tumansky R-13 - a twin-spool, axial-flow afterburning turbojet engine designed by Sergei Alekseevich Gavrilov, developed from the R-11
* Tumansky R-15 - an axial-flow, single shaft afterburning turbojet
* Tumansky R-21 - projected twin-spool, axial-flow afterburning turbojet based on the R-11
* Tumansky R-25 - a twin-spool, axial-flow afterburning turbojet engine, the ultimate development of the Tumansky R-11
* Tumansky R-29

## Awards

* Hero of Socialist Labour (1957)
* Lenin Prize winner (1957)
* Gospremii of the USSR (1946)
* Honorary Citizen Kuybyshev (1982)
* Order of Lenin (4 times)
* Order of the October Revolution
* Order of the Red Star
