Tupolev Tu-4

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Tu-4
Role Strategic bomber
National origin Soviet Union
Manufacturer Tupolev
First flight 19 May 1947
Introduction 1949
Retired 1988 (China)
Primary users
PLA Air Force
Produced 1949–1952
Number built 847
Developed from Boeing B-29 Superfortress
Variants Tupolev Tu-70
Tupolev Tu-75
Developed into Tupolev Tu-80
Tupolev Tu-85

The Tupolev Tu-4 (

Soviet Air Force from the late 1940s to mid-1960s. The aircraft was a copy of the American Boeing B-29 Superfortress, having been reverse-engineered
from seized aircraft that had made emergency landings in the USSR.

Design and development

Toward the end of

Pacific forward bases using B-29 Superfortresses. Joseph Stalin
ordered the development of a comparable bomber.

The U.S. twice refused to supply the Soviet Union with B-29s under

Yalta Agreement.[7]

Stalin told Tupolev to duplicate the Superfortress in as short a time as possible instead of continuing with his own comparable ANT-64/Tu-10.[8] The reverse-engineering effort involved 900 factories and research institutes, which finished the design work during the first year, and 105,000 drawings were made.[9] By the end of the second year, the Soviet industry was to produce twenty copies of the aircraft, ready for state acceptance trials.[10]

The Soviet Union used the metric system and so sheet aluminium in thicknesses matching the B-29's U.S. customary measurements was unavailable. The corresponding metric-gauge metal was of different thicknesses. Alloys and other materials new to the Soviet Union had to be brought into production. Extensive re-engineering had to take place to compensate for the differences, and Soviet official strength margins had to be decreased to avoid further redesign.[11] However despite those challenges, the prototype Tu-4 weighed only 340 kg (750 lb) more than the B-29, a difference of less than 1%.[12]

The engineers and suppliers of components were under pressure from Tupolev, Stalin, and the government to create an exact clone of the original B-29 to facilitate production. Tupolev had to overcome substantial resistance to use equipment that was not only already in production but also sometimes superior to that found on the B-29s.

Nudelman NS-23, a harder-hitting and longer-ranged 23 mm (0.91 in) cannon.[16] Additional changes were made as a result of problems encountered during testing related to engine and propeller failures,[17] and equipment changes were made throughout the aircraft's service life.[18]

The Tu-4 first flew on 19 May 1947 and was flown by test pilot

Tushino Aviation Day parade. At first three aircraft flew over and the Western observers assumed that they were merely the three B-29 bombers which they knew had been diverted to the Soviet Union during World War II. Minutes later a fourth aircraft appeared, and the observers realized the Soviets had reverse-engineered the B-29.[20]

Entry into service of the Tu-4 threw the U.S. Air Force into panic since the aircraft possessed sufficient range to attack Chicago or Los Angeles on a one-way mission, and that may have informed the maneuvers and air combat practice conducted by US and British air forces in 1948 involving fleets of B-29s.[21] The tests were conducted by the RAF Central Fighter Establishment and co-operative US B-29 groups and involved demonstration of recommended methods of attack against B-29/Tu 4-type bombers using RAF Gloster Meteor and de Havilland Vampire jet fighters. The Soviets developed four different midair refueling systems to extend the bomber's range, but these were fitted to only a few aircraft, and only a small number of the final design were installed on operational aircraft before the Tu-4 was superseded by the Tu-16.[22]

Operational history

A total of 847 Tu-4s had been built when production ended in the Soviet Union in 1952, some of which went to China during the later 1950s. Many experimental variants were built and the experience launched the Soviet strategic bomber program. Tu-4s were withdrawn from Soviet service in the 1960s, being replaced by more advanced aircraft including the Tupolev Tu-16 jet bomber (starting in 1954) and the Tupolev Tu-95 turboprop bomber (starting in 1956). By the beginning of the 1960s, the only Tu-4s still operated by the Soviets were used for transport or airborne laboratory purposes. A Tu-4A was the first Soviet aircraft to drop a nuclear weapon, the RDS-3.[23]

Variants

Tu-4 at China Aviation Museum
Tu-4
main production version, originally designated B-4
Tu-4 Variants without special designations:
Tu-4 ELINT and ECM[24]
Tu-4 mothership for the
Boeing B-29s interned during the war).[26]
Tu-4 escort fighter mothership (Project Burlaki)[27]
Tu-4 remotely controlled target drone converted from time expired bombers.[25]
Tu-4 fuel carrier[28]
Tu-4 in-flight refuelling testbeds (four different systems were trialled)[29]
Tu-4 radiation reconnaissance aircraft[30]
Tu-4 communications relay aircraft[30]
Tu-4A
Nuclear capable bomber used to test Soviet RDS-1, RDS-3 and RDS-5 nuclear bombs. The standard Tu-4 was not capable of carrying these weapons.[31]
Tu-4D
Troop transport (300 conversions).[32] Also known as Tu-76.
Tu-4K/KS
Anti-shipping version, armed with KS-1 Komet missiles carried between the engines under the wings.[33]
Tu-4LL
Engine testbed for the
Dobrynin VD-3K radial engine and AV-28 contra-rotating propellers.[34]
Tu-4NM
Drone launcher aircraft with Lavochkin La-17 unmanned aerial vehicles carried underwing[35]
Tu-4R
Long-range reconnaissance.[36]
Tu-4T
Paratroop transport (one example only)[37]
Tu-4TRZhK
Liquid oxygen tanker aircraft.[28]
Tu-4UShS
Navigational trainer.[36]
ShR-1
Testbed for Myasishchev M-4 to develop a bicycle-type landing gear.[25]
UR-1/-2
Testbed for Myasishchev M-4 powered controls.[38]
KJ-1 at China Aviation Museum, Beijing
Tu-4 AWACS
Chinese prototype with KJ-1 AEWC, airborne early warning and control radar and powered by Ivchenko AI-20K turboprop engines.[39] Two converted to allow the Chinese to monitor US nuclear weapons tests in the Pacific.[40]
Tu-70
Airliner, never reached mass production.
Tu-75
Cargo derivative, never reached mass production.
Tu-79
Tu-4 powered by M-49TK engines.
Tu-80
Long-range bomber development, never reached mass production.
Tu-85
Long-range bomber development, never reached mass production.
Tu-94
Tu-4 powered by Kuznetsov TV-2 turboprop engines.

Operators

 Soviet Union
  • Soviet Air Force

The Soviet Air Force operated 847 Tupolev Tu-4 bombers between 1948 and early 1960,[41] initially as long-range bombers. The first regiment to be re-equipped on the Tu-4 was the 185th Guards Aviation Regiment of the 13th Guards Bomber Aviation Division, stationed at Poltava Air Base in Ukraine. The training of personnel was carried out in Kazan, at the 890th long-range bomber regiment, turned into a training unit.[42] The pilots of the 890th Regiment had extensive experience flying American Boeing B-17 Flying Fortresses and Consolidated B-24 Liberator aircraft. A list of the Heavy Bomber Aviation Regiments, many of which operated Tu-4s, can be seen here. In March 1949 the 52nd Guards Heavy Bomber Aviation Regiment [ru] received Tu-4s;[43] the 121st Guards received Tu-4Rs in 1953.[44]

In 1954 the Soviets began phasing out the Tu-4 as Tupolev Tu-16 bombers entered service and, beginning in 1956, to Tupolev Tu-95 bombers. Tu-4s withdrawn from front line units were used for transport duties.[45]

 People's Republic of China

On 28 February 1953, Joseph Stalin gave China ten Tu-4 heavy bombers, and in 1960 two additional aircraft configured as navigational trainers arrived in Beijing. 11 Tu-4s were refitted with AI-20K turboprop engines between 1970 and 1973. The last PLAAF Tu-4 was retired in 1988.

In 1969, China developed its first

rotodome above the fuselage of the aircraft. However, due to clutter noise the KJ-1 failed to meet the PLAAF's requirements. The project was canceled in 1979 although further projects were proposed based on Tu-4 platform.[46]
The airframe was already obsolete however and the Tu-4 was ruled out for future developments. The single prototype is displayed at the PLAAF museum north of Beijing.

Survivors

China Aviation Museum, KJ-1.
China Aviation Museum, Tupolev Tu-4.
Tupolev Tu-4 at Monino
Tu-4 4114 (c/n 2805601), ex-KJ-1 AEWC, "4114"
Stored at Datangshan, China[47][48]
Tu-4 4134 (c/n 2205008), "4134"
Stored at Datangshan, China[49]
Tu-4 unknown (c/n 2805103), "01"
Stored at the Central Air Force Museum, Monino, Russia[50]

Specifications (Tu-4)

Data from Tupolev Tu-4 Soviet Superfortress.[51]

General characteristics

  • Crew: 11
  • Length: 30.18 m (99 ft 0 in)
  • Wingspan: 43.05 m (141 ft 3 in)
  • Height: 8.46 m (27 ft 9 in)
  • Wing area: 161.7 m2 (1,741 sq ft)
  • Aspect ratio: 11.5
  • Empty weight: 36,850 kg (81,240 lb)
  • Gross weight: 47,850 kg (105,491 lb)
  • Max takeoff weight: 55,600 kg (122,577 lb) – 63,600 kg (140,200 lb)
  • Powerplant: 4 × Shvetsov ASh-73TK 18-cyl. air-cooled radial piston engines, 1,790 kW (2,400 hp) each
  • Propellers: 4-bladed V3-A3 or V3B-A5, 5.06 m (16 ft 7 in) diameter [52]

Performance

  • Maximum speed: 558 km/h (347 mph, 301 kn) at 10,250 m (33,630 ft)
  • Range: 5,400 km (3,400 mi, 2,900 nmi) at 3,000 m (9,800 ft) with 63,600 kg (140,200 lb) take-off weight including 3,000 kg (6,600 lb) of bombs and 10% fuel reserves
  • Service ceiling: 11,200 m (36,700 ft)
  • Rate of climb: 4.6 m/s (910 ft/min) at 1,000 m (3,300 ft)
  • Time to altitude: 5,000 m (16,000 ft) in 18.2 minutes
  • Wing loading: 400 kg/m2 (82 lb/sq ft)
  • Power/mass: 0.11 kW/kg

Armament

  • Guns: * 10 × 23 mm (0.91 in) Nudelman-Suranov NS-23 aircraft cannon, two cannon in each of the four turrets and two cannon in the tail barbette
  • Missiles: * 2 ×
    MiG-15
    )
  • Bombs: * 6 × 1,000 kg (2,200 lb) bombs
or

See also

Related development

Aircraft of comparable role, configuration, and era

Related lists

References

Wikimedia Commons has media related to Tupolev Tu-4.

Notes

  1. ^ Gordon, 2002, p. 3
  2. ^ "Aircraft Deliveries." Archived 2018-02-23 at the Wayback Machine airforce.ru. Retrieved: 21 September 2007.
  3. ^ Gordon, 2002, pp. 8–10
  4. ^ "Soviet Union Impounds and Copies B-29." National Museum of the USAF. Retrieved: 17 July 2017.
  5. ^ a b Kerber, Leonid. "Tu-4 bomber epic" Archived 2023-11-27 at the Wayback Machine. militera.lib.ru: a compilation of articles published in 1988–1990 (in Russian). Retrieved: 29 December 2009.
  6. ^ Gordon, 2002, pp. 9–10
  7. ^ Gordon, 2002, p. 11
  8. ^ Gordon, 2002, p. 14
  9. ^ Jelinek, Pauline (25 January 2001). "Report: Soviet Union Copied US Plane". Associated Press. Archived from the original on 24 September 2015. Retrieved 12 June 2015.
  10. ^ Gordon, 2002, p. 26
  11. ^ Gordon, 2002, p. 20
  12. ^ Gordon, 2002, p. 24
  13. ^ Gordon, 2002, pp. 15–25
  14. ^ Gordon, 2002, pp. 24–25
  15. ^ Gordon, 2002, pp. 21 & 24
  16. ^ Gordon, 2002, p. 25
  17. ^ Gordon, 2002, p. 27
  18. ^ Gordon, 2002, pp. 66–68
  19. ^ Duffy and Kandalov 1996, p. 98.
  20. ^ Dow, James. "Parade." Archived 2023-11-01 at the Wayback Machine The Arrow. Retrieved: 29 December 2009.
  21. ^ "Archival RAF film of combat with B-29s." Archived 2011-06-04 at the Wayback Machine google.com. Retrieved: 29 December 2009.
  22. ^ Gordon, 2002, pp. 50-53
  23. ^ Duffy, 1996, p. 98
  24. ^ Gordon, 2002, pp. 42–43
  25. ^ a b c Gordon, 2002, p. 54
  26. ISBN 978-1857800999
    .
  27. ^ Gordon, 2002, pp. 43–47
  28. ^ a b Gordon, 2002, p. 53
  29. ^ Gordon, 2002, pp. 50–53
  30. ^ a b Gordon, 2002, p. 43
  31. ^ Gordon, 2002, pp. 34–36
  32. ^ Gordon, 2002, pp. 37, 40
  33. ^ Gordon, 2002, pp. 36–39
  34. ^ Gordon, 2002, pp. 55–57
  35. ^ Gordon, 2002, pp. 53, 54 & 57
  36. ^ a b Gordon, 2002, p. 42
  37. ^ Gordon, 2002, p. 41
  38. ^ Gordon, 2002, pp. 54–55
  39. ^ "Tu-4." Archived 2008-05-28 at the Wayback Machine simonb6.co.uk. Retrieved: 29 December 2009.
  40. ^ Duffy, 1996, p. 99
  41. ^ Nowicki 1994, p. 17.
  42. ^ Holm. "890th Bryanskiy Bomber Aviation Regiment". Archived from the original on 2023-12-07. Retrieved 2022-10-20.
  43. ^ "52nd Guards Heavy Bomber Aviation Regiment". Archived from the original on 3 September 2023. Retrieved 19 April 2023.
  44. ^ "121st Guards Sevastopolskiy Red Banner Heavy Bomber Aviation Regiment". ww2.dk. Archived from the original on 25 December 2023. Retrieved 19 April 2023.
  45. ^ Rigmant 1996, p. 66.
  46. ^ "Chinese Airborne Early Warning (AEW)." Archived 2007-04-03 at the Wayback Machine fas.org. Retrieved: 31 July 2011.
  47. ^ "Photo of the Tu-4 (c/n 286501) at the FAS.org website". Archived from the original on 30 April 2017. Retrieved 19 April 2023.
  48. ^ "Photo of the Tu-4 (4114, cn 2806501) AWACS example exhibited in the Datangshan Museum, China." Archived 2007-09-30 at the Wayback Machine airliners.net. Retrieved: 29 December 2009.
  49. ^ "Photo of the Tu-4 (4134, cn 225008) "missile carrier" exhibited in the Datangshan Museum, China." Archived 2007-09-30 at the Wayback Machine airliners.net. Retrieved: 29 December 2009.
  50. ^ "Photo of the Tu-4 exhibited in the Central Air Force Museum in Monino, Russia." Archived 2007-09-30 at the Wayback Machine airliners.net. Retrieved: 29 December 2009.
  51. ^ Gordon, 2002 page 34
  52. ^ Gordon, 2002, p. 64

Bibliography

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