6 decal variants:
1. P-39 Q-25, of 213 GIAP, Poland, September 1944, Lt. Nikolaj Strojkov
2. P-39 Q-25, 2e Escadrille, GC 2/9 Auvergne, Le Vallon, 1945
3. P-39 Q-20, p. aircraft of the PAF Comm. Gen. Polynin, late 1945
4. P-39 Q-5, 4th Reconnaissance Sq,. 1943
5. P-39 Q-15, Zebra training Airacraft, 1944
6. P-39Q Q-25, 213, GIAP, 22 GIAD, USSR 1944
Other major users of the type include the Free French, the Royal Air Force, the United States Army Air Forces, and the Italian Co-Belligerent Air Force. Designed by Bell Aircraft, it had an innovative layout, with the engine installed in the center fuselage, behind the pilot, and driving a tractor propeller via a long shaft. It was also the first fighter fitted with a tricycle undercarriage. Although its mid-engine placement was innovative, the P-39 design was handicapped by the absence of an efficient turbo-supercharger, limiting it to low-altitude work. Together with the derivative P-63 Kingcobra, the P-39 was one of the most successful fixed-wing aircraft manufactured by Bell.