This would be a nice addition to the Soviet aircraft fleet
The Bell P-63 Kingcobra was an American fighter developed in World War II from the P-39 Airacobra in an attempt to correct that aircraft's deficiencies. Although the aircraft was not accepted for combat use by the USAAF, it was successfully adopted by the Soviet Air Force.
The P-63 had an impressive roll rate, besting the P-47, P-40, N1K2 and P-51 with a rate of 110° at 275 mph.
Manufacturer: Bell Aircraft Corporation
Maiden flight: 7 December 1942
Introduced: October 1943
Primary users: United States Army Air Force, Soviet Air Force ,French Air Force
Produced: 1943-1945
Number built: 3,303
Developed from: P-39 Airacobra
General characteristics
Crew: 1
Length: 32 ft 8 in (10.0 m)
Wingspan: 38 ft 4 in (11.7 m)
Height: 12 ft 7 in (3.8 m)
Wing area: 248 ft² (23 m²)
Empty weight: 6,800 lb (3,100 kg)
Loaded weight: 8,800 lb (4,000 kg)
Max takeoff weight: 10,700 lb (4,900 kg)
Powerplant: 1× Allison V-1710-117 liquid-cooled V-12, 1,800 hp (1,340 kW)
Performance
Maximum speed: 410 mph (660 km/h) at 25,000 ft (7,620 m)
Range: Combat: 450 mi (725 km) Ferry: 2,200 mi (3,540 km)
Service ceiling: 43,000 ft (13,100 m)
Rate of climb: 2,500 ft/min (12.7 m/s)
Armament
1× 37 mm T9 cannon firing through the propeller hub
4× 0.50 in (12.7mm) machine guns (2 in the nose, 2 in the wings)
http://en.wikipedia.org/wiki/P-63_Kingcobra