File:Ufimtsev propeller and aircraft engine at the Central House of Aviation and Cosmonautics (fragment).jpg

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Русский: Шестерни пропеллера первого русского биротативного шетицилиндрового мотора А. Г. Уфимцева (изобретатель оригинальных авиационных двигателей и самолётов - сферопланов). Опытный образец 1908 года. Мощность около 25 л.с. Мотор кустарной постройки, испытывался на заводе Щетинина в 1908-1909 гг. Дальнейшим усовершенствованием его явлается четырёхцилиндровый мотор той же системы, построенный в 1916 г. Бежецким воздухоплавательным кружком при Брянском заводе. Двигатель испытывался при Лесном политехническом институте, показав мощность около 40 л.с. Центральный дом авиации и космонавтики, вики-экспедиция Викимедиа РУ.
English: Ufimtsev aircraft propeller and aircraft engine (1908). Central House of Aviation and Cosmonautics, WikiExpeditions
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