P-39 Airacobra
| Armament |
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| Engine | Allison V-1710 of 1,200 hp |
| Maximum speed | 376 mph |
| Cruising speed | 250 mph |
| Range | 650 miles |
| Service ceiling | 35,000 ft. |
| Span | 34 ft. |
| Length | 30 ft. 2 in. |
| Height | 12 ft. 5 in. |
| Weight | 7,570 lbs. normal load |
| Type | Number built/ converted |
Remarks |
| XP-39 | 1 | Prototype P-39 |
| YP-39 | 13 | Improved XP-39; service test aircraft |
| YP-39A | 1 (cv) | YP-39 with new engine; high alt. test only |
| XP-39B | 1 (cv) | XP-39 with new engine; no turbo-supercharger |
| P-39C | 80 | P-45 redesignated; 60 became P-39D |
| P-39D | 60 (cv) | Improved P-39C; 4x.30, 2x.50 mgs. and 37mm cn. |
| P-39D-1 | 863 | Improved P-39D; self-sealing fuel tanks |
| P-39D-2 | 1 (cv) | Improved P-39D-1; 158 ordered |
| XP-39E | 3 | P-39D-1 with new engine; XP-63 prototype |
| P-39E | 0 | Improved P-39D-1; 4,000 ordered |
| P-39F-1 | 229 | P-39D with aero products propeller |
| P-39F-2 | 2 (cv) | P-39F modified for photo reconnaissance |
| P-39G | 0 | 1,800 ordered, became K, L, M, N models |
| P-39H | 0 | Designation not assigned |
| P-39J | 25 | Modified P-39D-1; new engine and auto boost |
| P-39K | 210 | P-39F with new engine |
| P-39L | 250 | Modified P-39K; Curtiss prop. and rocket rails |
| P-39M | 240 | Modified P-39L; new engine and prop. gearing chg. |
| P-39N | 2,095 | Improved P-39M; new engine |
| P-39P | 0 | Designation not assigned |
| P-39Q | 4,905 | Improved P-39N; 37mm cn. and four .50-cal. mgs. |
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