It is quite a rare find - the Soviet M-105 (VK-105) aviation engine. Four-stroke V-shaped liquid-cooled engine with 12 cylinders designed by V.Klimov. It was installed on Soviet LaGG-3, Yak-1,2,3,4,7 fighters, Pe-2 bombers, and even on French Morane-Saulnier MS406 fighters of the Finnish Air Force, on which the Finns, due to the lack of original engines, installed captured Soviet ones.
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