Вертолёты Братухина/Bratukhin helicopters

Identification (not 100%) : . 0:01 Bratukhin Omega (2MG) building and testing August 1941, first flight summer 1943 . 0:40 Bratukhin Omega-II first flight September 1944 . 1:31 Bratukhin G3 first flight spring 1946 . 1:38 Bratukhin G4 first flight autumn 1946 . 2:06 Bratukhin B-5 testing the end of winter 1947 . 2:10 Bratukhin B-10 building spring 1948 (not tested) . 2:17 Bratukhin B-11 first flight June 18, 1948 .