6 decal variants:
1.P-39Q , 51st FS/32nd FG, Panama 1943
2.P-39Q-6, 82nd TRS/71st TRG, 1944, New Guinea, Lt. P. A. McDermott
3.P-39Q, kpt.G.A.Rechkalov, 9th Guard Air Fighter Division, Poland 1944
4.P-39Q, kpt.G.A.Rechkalov, 9th Guard Air Fighter Division, Polsko 1944
5.P-39Q-1, 72nd FS/318th FG, Makin Island, 1943/44, Charlie Taylor
6.P-39Q-1, 46th FS/15th FG, Canton Island, pilot 1Lt. Jack Garnett
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.