Dr. Brunolf Baade's Aircraft 150, then under development. Variants I-210 - The initial version with BMW 003 or Tumanskii RD-20 engines, project only. I-211 - The first flyable example completed as the I-211 with Lyul'ka TR-1 engines, rebuilt as the I-215. I-211S - I-211 with swept wing and unswept tail, project only. I-215 - The re-built I-211 with Rolls-Royce Derwent V engines and other minor modifications. I-215D - Bicycle-undercarriage I-215 built to order of OKB-1. Specifications (I-211 as tested) See also References Bibliography Gordon, Yefim & Kommissarov, Dmitry. Early Soviet Jet Fighters. Manchester, UK: Hikoki Publications, 2014. . Gunston, Bill. The Osprey Encyclopedia of Russian Aircraft 1875–1995. London: Osprey, 1995. . Further reading Green, William & Swanborough, Gordon. "The Complete Book of Fighters". London: Salamander Books. 1994. External links I-215 at Ugolok Neba site (in Russian) Alekseyev aircraft Abandoned military aircraft projects of the Soviet Union 1940s Soviet fighter aircraft Twinjets Aircraft first flown in 1947