From Wikipedia - "The Sikorsky Ilya Muromets (Sikorsky S-22, S-23, S-24, S-25, S-26 and S-27) were a class of Russian pre-World War I large four-engine commercial airliners and military heavy bombers used during World War I by the Russian Empire.[1] The aircraft series was named after Ilya Muromets, a hero from Slavic mythology.[2] The series was based on the Russky Vityaz or Le Grand, the world's first four-engined aircraft, designed by Igor Sikorsky.[3] The Ilya Muromets aircraft as it appeared in 1913 was a revolutionary design, intended for commercial service with its spacious fuselage incorporating a passenger saloon and washroom on board. The Ilya Muromets is the world's first multi-engine aircraft in production and at least sixty were built.[4] During World War I, it became the first four-engine bomber to equip a dedicated strategic bombing unit.[5] This heavy bomber was unrivaled in the early stages of the war, as the Central Powers had no aircraft capable enough to rival it until much later.[6]". It doesn't fly well at the moment :\ . But it was a lot of fun to build and I'm quite happy with the result.