Зображення:Sikorsky Ilya Muromets.jpg

The Sikorsky Ilya Muromets four-engine biplane bomber of the Russian Air Service used during the First World War.

Photo from The War Illustrated, 17 July 1915. Caption reads:

Largest biplane yet invented. The gigantic Sikorsky machine, a feature of the Russian Air Service, which is driven by four 120 h.-p. engines working four separate propellers. The biplane is fitted with a large cabin designed to carry as many as twenty persons.

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