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Tupolev Tu-4

Tupolev · Bomber · USSR · Early Jet (1946–1969)

Tupolev Tu-4 — Bomber
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The Tupolev Tu-4 (NATO reporting name Bull) was the Soviet Union's first long-range bomber capable of delivering a nuclear weapon — a reverse-engineered copy of the American Boeing B-29 Superfortress. Andrei Tupolev's design bureau reverse-engineered three B-29s interned in Soviet Far East airfields in 1944 after emergency landings during U.S. bombing raids on Japan. The first Tu-4 flew on 19 May 1947; about 847 Tu-4s were built between 1949 and 1952 at Kazan, Voronezh, and Kuibyshev (Samara). The Tu-4 served Soviet Long-Range Aviation as the principal long-range bomber from 1949 until replacement by the Tu-95 from 1956 onward.

The Tu-4 used a 1:1 reverse-engineered copy of the B-29's airframe with Soviet-built ASh-73TK 18-cylinder radial engines (2,400 hp each, similar specifications to the B-29's Wright R-3350). Maximum speed 558 km/h, range 6,200 km, service ceiling 11,200 m. Maximum bomb load 6,000 kg internal — sufficient to carry the RDS-3 first-generation Soviet atomic bomb (28 August 1949 Soviet first nuclear test detonated 22 kt RDS-1 from a tower; subsequent RDS-3 / RDS-4 designed for Tu-4 air delivery). Defensive armament: 10 × NR-23 23 mm cannons in 5 turret positions plus tail position.

Tu-4 service spanned Soviet Long-Range Aviation long-range-bomber duty 1949-1956 and Chinese People's Liberation Army Air Force (PLAAF) operations through the 1980s. The PLAAF received 25 Tu-4s in 1953; these served Chinese first-generation long-range-bomber duty through the 1960s. Soviet Tu-4s were retired from front-line long-range-bomber duty by 1956 (replaced by the jet-powered Tupolev Tu-16 and turboprop Tu-95); surviving airframes served as test-beds for radar, electronics, and propulsion experiments through the 1980s. About 5 Tu-4 airframes survive in 2026 at Russian and Chinese museums.

For Kids — a shorter, friendlier version

The Tupolev Tu-4 was the Soviet Union's first long-range bomber that could carry an atomic bomb. It was actually a near-exact copy of the American Boeing B-29 Superfortress. The Soviets made the copy after three B-29s made emergency landings on Soviet soil in 1944.

Soviet engineers took apart one of the B-29s piece by piece. They measured every nut, bolt, and rivet. Then they built a Soviet version that looked almost the same as the original. The work took only three years.

The Tu-4 first flew in May 1947. About 847 Tu-4s were built between 1949 and 1952 at three different Soviet factories. The plane had four big piston engines, each with 2,400 horsepower. Its top speed was around 350 mph.

The Tu-4 was longer than a basketball court and could fly 3,850 miles without refueling. It served the Soviet long-range air force from 1949 until 1956. Then the new Tu-95 Bear turboprop bomber took over the long-range job. A few Tu-4s were used for training and testing until the 1960s.

Fun Facts

  • The Tu-4 was a near-exact Soviet copy of the American Boeing B-29 Superfortress.
  • Soviet engineers measured every nut, bolt, and rivet on three B-29s that landed in Soviet territory in 1944.
  • About 847 Tu-4s were built between 1949 and 1952.
  • The plane was the Soviet Union's first atomic-bomb carrier.
  • Its first flight was on 19 May 1947, only three years after the copy work began.
  • The Tu-4 served Soviet long-range air units from 1949 until 1956.

Kids’ Questions

Why did the Soviet Union copy an American bomber?

After World War II, the Soviets needed a long-range bomber but did not have time to design one. When three damaged American B-29s landed in Soviet territory in 1944, Soviet engineers took the chance to copy the plane piece by piece. It was much faster than designing a new bomber from scratch.

How similar was the Tu-4 to the B-29?

The Tu-4 looked almost exactly like the B-29 from the outside. The wings, body, tail, and engines were near-perfect copies. Small differences came from using Soviet metric tools and Soviet-made parts.

Variants

Tu-4 (basic)
Standard production long-range bomber. About 760 built 1949-1952.
Tu-4A (nuclear-capable)
Modified for RDS-3 / RDS-4 atomic-bomb delivery. About 100 conversions.
Tu-4D / Tu-4T
Long-range / paratroop variants. Limited production. Tu-4T carried up to 28 paratroops.

Notable Operators

Soviet Long-Range Aviation
Principal user. ~700 Tu-4s in service 1949-1956 as Soviet first-generation nuclear long-range bomber.
People's Liberation Army Air Force (China)
25 Tu-4s delivered 1953. Served Chinese first-generation long-range bomber role through the 1960s. Last Chinese Tu-4 retired ~1988.

Frequently Asked Questions

Was the Tu-4 really a B-29 copy?

Yes — a near-exact 1:1 reverse-engineered copy. Three U.S. Air Force B-29s landed in Soviet Far East airfields between July 1944 and January 1945 after emergency damage during bombing raids on Japan. Stalin ordered Andrei Tupolev to copy the design exactly; the result was the Tu-4. Even non-functional features (such as a small reinforcing patch on the original B-29 fuselage) were faithfully reproduced because Tupolev's team didn't know which features were structurally necessary.

Could the Tu-4 reach the United States?

No — only one-way. The Tu-4's 6,200 km range allowed reaching the U.S. west coast from Soviet Far East airfields, but without enough fuel to return. The Soviet Union's nuclear-deterrent strategy 1949-1956 was one-way Tu-4 missions; the more-capable Tu-95 from 1956 provided two-way intercontinental range that made the deterrent credible.

How many Tu-4s were built?

About 847 airframes between 1949 and 1952 at Kazan, Voronezh, and Kuibyshev (Samara) plants. Plus 25 export-built to China. Combined Soviet + Chinese production ~872 airframes.

Are any Tu-4s preserved?

About 5 airframes survive. Russian Aviation Museum (Monino) has one. China's Aviation Museum (Datangshan, Beijing) has one. A handful of others are at smaller Russian short-haul museums. None are airworthy.

Sources

See Also