Tupolev Tu-4 (Bull)
Technical Information

Background
During World War II, the United States twice refused to supply the Soviet Union with the Boeing B-29 Superfortress under lend lease. During 1944, four B-29s made emergency landings and crashed in the Far East of the Soviet Union. In accordance with the Soviet–Japanese Neutrality Pact, the American bombers bombers were interned. Although the U.S. demanded them returned, the request was refused and they were used to reverse engineer the Superfortress.

The Soviets had B-29 "Ramp Tramp" 42-6256, B-29 "Ding Hao" 42-6358 and B-29 "General H. H. Arnold Special" 42-6365 and the wreckage of B-29A "Cait Paomat II" 42-93829 from Boeing-Renton. These four bombers represented three different models built by two factories. The three B-29s were repaired and flown to Moscow and delivered to Tupolev for reverse-engineering. One B-29 was dismantled, the second used for flight tests and training and the third was left intact for reference. Tupolev engineers reverse-engineered and built the Tupolev Ту-4 / Tu-4. NATO Code Name "Bull".

Technical Details
Crew  Eleven (pilot, co-pilot, bombardier, navigator, engineer, radio, CFC gunner, waist gunners, tail gunner, radar)
Engine  4 × Shvetsov ASh-73TK 18-cyl air-cooled radial piston engines 2,400 hp each with four bladed propellers
Span  141' 3"
Length  99'
Height  27' 9" (8.46m)
Maximum Speed  347 mph at 33,630'
Range  3,400 miles with 140,200 take off weight (with 6,600 lbs of bombs and 10% fuel reserve)
Armament  10 x 23mm Nudelman-Suranov NS-23 aircraft cannons, 2x4 gun turrets and 2 cannons in the tail barbette
Bombload  6,600 pounds of bombs (6 x 2,2000 lbs) or 2 x KS-1 Komet missles or 1 x RDS-1 nuclear bomb (Tu-4A only)