I-15 bis (I-152, TSKB3 bis) - Soviet single-engine fighter of the 30s, created in OKB Polikarpov as a further development of fighter I-15. Armament 4 machine gun PV-1 or BS and 150 kg bombs.
In 1935, at an air show in Milan I-15 bis officially recognized as the best fighter in the world.
In Spain was not used, but was in China, and to a small extent, on Khalkhin Gol. In World War II was used prior to 1942.