A1928 graduate of Leningrad Institute of Transport Engineering,
I. V. Chetverikov worked briefly with D. P. Grigorovich
before joining the Tsentralnoe
Konstruktorskoe Byuro (Central Design Bureau; TsKB).
From 1931 -1933 was in charge of seaplane development
section; responsible for designing MDR-3 reconnaissance
flying-boat, OSGA-101 light amphibian, and related SPL
submarine-borne small floatplane. His ARK-3 flying-boat
was a failure, but the three-seat MDR-6 (or Che-2) of 1937
was produced for Soviet Naval Aviation, 50 being built at
Taganrog between 1939 and German invasion of Crimea
in 1941. Development, but no further production, of MDR-
6 continued during Second World War; after completion
in 1947 of three prototypes of the eight-passenger TA-1
flying-boat, this bureau was closed down in 1948 and
Chetverikov became a lecturer.
