Ilya Muromets
Without question the most famous aircraft produced during this period was the Sikorsky Ilya Muromets, the first four-engine bomber to equip a dedicated strategic bombing unit. This heavy bomber was unrivalled in the early stages of the war, as the Central Powers had no comparable aircraft until much later. During World War I, Russia lost only one Sikorsky Ilya Muromets to enemy action in more than 400 sorties.