The Polikarpov I-153 Chaika is a late 1930s Soviet sesquiplane fighter. Developed from the I-15 with a retractable undercarriage, the I-153 fought in the Soviet-Japanese combats in Mongolia and was one of the major Soviet fighter types in the early years of the Second World War. Three I-153s are still in flying condition. The I-153 is powered by the Shvetsov M-62 radial engine.