Tupolev Tu-104

The Tupolev Tu-104 (NATO reporting name: Camel) was a twinjet medium-range narrow-body turbojet-powered Soviet airliner. It was the second to enter regular service, behind the British de Havilland Comet, and was the only jetliner operating in the world from 1956 to 1958, when the British jetliner was grounded due to safety concerns.[1]

Tu-104
Aeroflot Tupolev Tu-104B at Arlanda Airport in 1972
Role Narrow-body jet airliner
Manufacturer Tupolev OKB
Designer Andrei Tupolev
First flight 17 June 1955 (1955-06-17)
Introduction 15 September 1956 (Aeroflot)
Retired 1981
Status Retired
Primary users Aeroflot
ČSA
Produced 1956–1960
Number built 201
Developed from Tupolev Tu-16
Variants Tupolev Tu-110
Tupolev Tu-124
Aeroflot Tupolev Tu-104B at Arlanda Airport in 1968, with drag parachute deployed.

In 1957, Czechoslovak Airlines – ČSA, (now Czech Airlines) became the first airline in the world to fly a route exclusively with jet airliners, using the Tu-104A variant between Prague and Moscow. In civil service, the Tu-104 carried over 90 million passengers with Aeroflot (then the world's largest airline), and a lesser number with ČSA, while it also saw operation with the Soviet Air Force. Its successors included the Tu-124, the Tu-134 and the Tu-154.

Design and development

At the beginning of the 1950s, the Soviet Union's Aeroflot airline needed a modern airliner with better capacity and performance than the piston-engined aircraft then in operation. The design request was filled by the Tupolev OKB, which based their new airliner on its Tu-16 'Badger' strategic bomber. The wings, engines, and tail surfaces of the Tu-16 were retained with the airliner, but the new design adopted a wider, pressurised fuselage designed to accommodate 50 passengers. The prototype build in MMZ 'Opit' first flew on June 17, 1955 with Yu.L. Alasheyev at the controls. It was fitted with a drag parachute to shorten the landing distance by up to 400 metres (1,300 ft), since at the time not many airports had sufficiently long runways.[1] The first serial TU-104 took off on 5 November 1955.[2]

The Tu-104 was powered by two Mikulin AM-3 turbojets placed in the wing roots (resembling the configuration of the de Havilland Comet). The crew consisted of five people: two pilots, a navigator (seated in the glazed "bomber" nose), a flight engineer and a radio operator (later eliminated). The airplane raised great curiosity by its lavish "Victorian" interior – so-called by some Western-hemisphere observers – due to the materials used: mahogany, copper and lace.[1]

Tu-104 pilots were trained on the Il-28 bomber, followed by mail flights on an unarmed Tu-16 bomber painted in Aeroflot colors, between Moscow and Sverdlovsk. Pilots with previous Tu-16 experience transitioned into the Tu-104 with relative ease. The Tu-104 was considered difficult to fly, as it was heavy on controls and quite fast on final approach, and at low speeds it would display a tendency to stall, a feature common with highly-swept wings. Experience with the Tu-104 led the Tupolev Design Bureau to develop the world's first turbofan series-built airliner, the Tupolev Tu-124, designed for local markets, and subsequently the more commercially successful Tu-134.

Operational history
Czechoslovak Airlines Tu-104A at Kbely Aviation Museum, Prague

On 15 September 1956, the Tu-104 began revenue service on Aeroflot's Moscow-Omsk-Irkutsk route, replacing the Ilyushin Il-14. The flight time was reduced from 13 hours and 50 minutes to 7 hours and 40 minutes, and the new jet dramatically increased the level of passenger comfort.[1] By 1957, Aeroflot had placed the Tu-104 in service on routes from Vnukovo Airport in Moscow to London, Budapest, Copenhagen, Beijing, Brussels, Ottawa, Delhi, and Prague.

In 1957, ČSA Czechoslovak Airlines became the only export customer for the Tu-104, placing the aircraft on routes to Moscow, Paris, and Brussels. ČSA bought six Tu-104As (four new and two used examples) configured for 81 passengers. Three of these aircraft were subsequently written off (one due to a refueling incident in India and another to a pilot error without fatalities).[1]

In 1959 a Tu-104 was leased to Sir Henry Lunn Ltd. (Lunn Poly) of London which used the aircraft to transport holiday-makers to Russia with a 4.5 hour flight time.

Whilst the Tu-104 continued to be used by Aeroflot throughout the 1960s and 1970s, the safety record of the aircraft was poor in comparison to subsequent jet airliners (16 of 96 aircraft were lost in accidents). The Tu-104 was unreliable, heavy, very unstable with poor control response, with an inclination to Dutch roll. Poor design aerodynamics of the wings resulted in a propensity to stall with little or no warning and a dangerous tendency to pitch-up violently before stalling and entering an irrecoverable dive. Due to the fear of inadvertent stalls aircrew would fly approaches above the recommended approach speed, landing at 270–300 km/h (170–190 mph), nearly 50 km/h (31 mph) faster. At least two accidents were attributed to the pitch-up phenomenon, prompting changes to the design of the aircraft and operating procedures, but the problem remained. Aeroflot retired the Tu-104 from civil service in March 1979 following a fatal accident at Moscow, but several aircraft were transferred to the Soviet military, which used them as staff transports and to train cosmonauts in zero gravity. After a military Tu-104 crash in February 1981 killed 52 people (17 were senior army and naval staff), the type was permanently removed from service. The last flight of the Tu-104 was a ferry flight to Ulyanovsk Aircraft Museum in 1986.

Variants
A Tu-104 statue near Vnukovo Airport
Тu-104 preserved at Monino museum. This aircraft was used to train cosmonauts.

Data from: [1]

  • Tu-104 – initial version seating 50 passengers. It used two Mikulin AM-3 turbojet engines, each with 6,735 kilograms (14,848 lb) of thrust. 29 airframes were built.
  • Tu-104 2NK-8 – Proposed version powered by two Kuznetsov NK-8 turbofan engines.
  • Tu-104A – Improved version appearing in June 1957; continued improvements of the Mikulin engines (Mikulin AM-3M each with 8,700 kilograms (19,200 lb) of thrust) permitted significant growth in capacity, resulting in a 70-seater variant. The Tu-104A became the definitive production variant. On 6 September 1957, it flew with 20 t of payload at 11,211 metres (36,781 ft) of altitude. On 24 September 1957, it reached 970.8 km/h (603.2 mph) average speed with a two tonne payload. A total of 80 airframes were built, of which six were exported to Czechoslovakia.
  • Tu-104AK – testbed aircraft for Zero-G cosmonauts' training and testing the Soviet space programme equipment
  • Tu-104A-TS – Five Tu-104A's converted to freighter/medevac aircraft.
  • Tu-104B – Further improvements made by stretching fuselage 1.2 metres (3 ft 11 in) and fitting new Mikulin AM-3M-500 turbojets (9,700 kilograms (21,400 lb) of thrust each). The Tu-104B was able to accommodate 100 passengers. This variant took advantage of the newer fuselage from the Tu-110 and the existing wings. It began revenue service with Aeroflot on 15 April 1959 on the Moscow-Saint Petersburg route. A total of 95 airframes were built. Most were later rebuilt to Tu-104V-115 standard.
  • Tu-104B-TS – Six Tu-104B's converted to freighter/medevac aircraft.
  • Tu-104D – VIP version with two sleeper cabins forward and a 39-seat cabin aft.
  • Tu-104D-85 – Tu-104A airframes rebuilt to accommodate 85 passengers.
  • Tu-104D 3NK-8 – Project powered by three NK-8 engines, precursor of Tu-154.
  • Tu-104E – A higher performance Tu-104 powered by RD-16-15 engines giving better fuel economy and greater thrust. Two prototypes were converted from Tu-104B's CCCP-42441 and CCCP-42443. The program was cancelled in the mid-1960s in favor of the Tu-154.
  • Tu-104G – VIP version for the Federal government with two VIP cabins forward and a 54-seat cabin aft.
  • Tu-104LL – Several serial numbers converted for use in testing Tu-129, Tu-22M electronics, and air-to-air missile systems (including launch).
  • Tu-104SH – Navigator trainer in two versions
  • Tu-104V – The first use of this designation was for a projected 117 seat medium haul version with six-abreast seating. Project cancelled.
  • Tu-104V – The second use of this designation was used for Tu-104A airframes rebuilt to accommodate 100/105 passengers. A later version packed 115 passengers in by reducing seat pitch and adding seat rows.
  • Tu-104V-115 – Tu-104B airframes rebuilt to accommodate 115 passengers, with new radio and navigational equipment.
  • Tu-107 – Proposed military transport version with rear loading ramp and defensive turret armed with paired cannon. One prototype built; project cancelled
  • Tu-110 – Four-engined version intended for export. A number of prototypes were built. Project cancelled.
  • Tu-118 – A projected turboprop freighter version powered by four Kuznetsov TV-2F engines.

Former operators
CSA Czechoslovak Airlines Tupolev Tu-104A at Arlanda Airport in 1971.
 Czechoslovakia
 Mongolia
 Soviet Union

Accidents and incidents
Wreckage of the Czechoslovak Airlines Tupolev Tu-104 (OK-MDE) near Nicosia airport (2015)

According to the American Flight Safety Foundation, between 1958 and 1981, 16 Tu-104s were lost in crashes out of 37 aircraft written off (hull loss rate = 18%) with a total of 1140 fatalities.[3]

Date Tail number Aircraft type Location Casualties Description Refs
19 February 1958 CCCP-Л5414 Tu-104 Savasleyka 0/3 Force-landed short of the runway after running out of fuel following a diversion. [4]
15 August 1958 CCCP-Л5442 Tu-104A Chita 64/64 Aeroflot Flight 4 stalled, spun down and crashed after entering an updraft at 12,000 m (39,000 ft). [5][6]
17 October 1958 CCCP-42362 Tu-104A Kanash 80/80 A flight carrying high-level delegations crashed when it entered a dive and crashed after entering an updraft at 12,000 m (39,000 ft). The Tu-104 was limited to 9,000 m (30,000 ft) and the tail modified in the wake of this accident. [7]
20 October 1960 CCCP-42452 Tu-104A Ust-Orda 3/68 Aeroflot Flight 5 struck sloping terrain and crashed while the pilot was checking the landing lights. [8][9]
1 February 1961 CCCP-42357 Tu-104A Vladivostok 0 Overran runway after landing too late. [10]
16 March 1961 CCCP-42438 Tu-104B near Koltsovo 7/51 Aeroflot Flight 68 force-landed on a frozen pond following double engine failure. Two people on the ground died when a house was struck by the aircraft. [11][12]
10 July 1961 CCCP-42447 Tu-104B Odessa 1/94 Aeroflot Flight 381 crashed after entering downdrafts while landing in bad weather. [13][14]
17 September 1961 CCCP-42388 Tu-104A Tashkent 0 Heavy landing; written off. [15]
2 November 1961 CCCP-42504 Tu-104B Vladivostok 0 Struck a radio antenna while on approach and force-landed in a field following engine failure. [16]
4 June 1962 CCCP-42491 Tu-104B Sofia 5/5 Struck a mountain following engine failure. [17]
30 June 1962 CCCP-42370 Tu-104A Krasnoyarsk Krai 84/84 Aeroflot Flight 902 crashed after it was accidentally shot down by a missile. [18]
3 September 1962 CCCP-42366 Tu-104A Khabarovsk 86/86 Aeroflot Flight 3 lost control at 4,500 m (14,800 ft) while climbing. Although the cause was not determined, issues with the autopilot were blamed. An accidental shoot-down by a missile was also theorized. [19][20]
25 October 1962 CCCP-42495 Tu-104B Sheremetyevo 11/11 Crashed on takeoff during a test flight due to cross-connected rudder controls. [21]
16 March 1963 OK-LDB Tu-104A Santa Cruz Airport Un­known Caught fire while being refueled. [22]
18 May 1963 CCCP-42483 Tu-104B Leningrad 0 Stalled on approach and crashed. [23]
13 July 1963 CCCP-42492 Tu-104B near Irkutsk Airport 33/35 Aeroflot Flight 12 crashed short of the runway due to incorrect instrument readings. Water entered the instrument wiring, causing a short circuit. [24][25]
9 June 1964 CCCP-42476 Tu-104B Novosibirsk Un­known Overshot runway in heavy rain during second landing attempt. [26]
28 April 1969 CCCP-42436 Tu-104B Irkutsk Un­known Landed 600 m (2,000 ft) short of runway; written off. [27]
1 June 1970 OK-NDD Tu-104A Tripoli 13/13 Crashed short of the runway after the pilot attempted an approach to runway 36. [28]
25 July 1971 CCCP-42405 Tu-104B Irkutsk 97/126 Aeroflot Flight 1912 landed 150 m (490 ft) short of the runway; breaking off the left wing. The aircraft rolled to the left and caught fire. [29][30]
10 October 1971 CCCP-42490 Tu-104B Vnukovo 25/25 Aeroflot Flight 773 crashed shortly after takeoff after an explosion occurred while climbing through 1,200 m (3,900 ft). The explosion damaged the fuselage and destroyed flight controls. Control was lost and the aircraft rolled right and entered a descent until it struck the ground. The explosion was caused by a bomb placed between the cabin wall and a passenger seat in the rear of the cabin near frame 45. [31][32]
19 March 1972 CCCP-42408 Tu-104B Omsk 0 Struck a snow wall short of the runway during the fifth landing attempt. [33]
24 April 1973 CCCP-42505 Tu-104B Leningrad 2/57 Hijacked by a passenger who demanded to be taken to Sweden. The crew returned to Leningrad. While the landing gear was lowered, the hijacker set off a bomb, killing himself and the flight engineer. The bomb blew a hole in the fuselage, but the aircraft was able to land safely. [34][35]
18 May 1973 СССР-42379 Tu-104B Buryat ASSR 82/82 Aeroflot Flight 109 was hijacked by a passenger who demanded to be taken to China. A bomb that the hijacker had put on board the aircraft detonated at 30,000 ft (9,100 m) and the aircraft lost control and crashed east of Lake Baikal. [36][37]
29 August 1973 OK-MDE Tu-104A Nicosia 0/70 CSA Flight 531 veered off the runway after landing after the pilot failed to stop the aircraft in time. The wreckage remains at the airport site to this day. [38]
30 September 1973 CCCP-42506 Tu-104B Sverdlovsk 108/108 Aeroflot Flight 3932 crashed shortly after takeoff due to a power failure of the artificial horizons. [39]
13 October 1973 CCCP-42486 Tu-104B Domodedovo 122/122 Aeroflot Flight 964 crashed while on approach following a power failure to the compass system and main gyros and resulting loss of control. The crash is the worst involving the Tu-104. [40]
7 December 1973 CCCP-42503 Tu-104B near Moscow 16/75 Aeroflot Flight 964 crashed after a wing struck the ground after coming in too fast. [41][42]
5 November 1974 CCCP-42501 Tu-104B Chita 0 Overran the runway on landing and came to rest against a railway embankment. [43]
30 August 1975 CCCP-42472 Tu-104B Tolmachevo Airport 0 Right landing gear collapsed following a heavy landing. [44]
9 February 1976 CCCP-42327 Tu-104A Irkutsk 24/115 Aeroflot Flight 3739 crashed after banking to the right while climbing for takeoff and entering a descent. Debris from the aircraft struck a North Korean Tu-154 that had just landed. Although the official cause of the accident was loss of control caused by crosswinds, improper fueling (too much fuel on one side) and pilot error were also theorized. [45][46]
17 July 1976 CCCP-42335 Tu-104A Chita Airport 0 Failed to take off and crashed due to overloading. [47]
28 November 1976 CCCP-42471 Tu-104B near Sheremetyevo 72/72 Aeroflot Flight 2415 lost control and crashed following artificial horizon failure and resulting crew disorientation. [48][49]
1976 CCCP-42371 Tu-104A Borispol Airport Un­known Crashed short of the runway after the engines were shut down in flight. [50]
13 January 1977 CCCP-42369 Tu-104A Alma-Ata 96/96 Aeroflot Flight 3843 exploded in mid-air due to an engine fire. [51][52]
17 March 1979 CCCP-42444 Tu-104B near Moscow 58/119 While operating as Aeroflot Flight 1691, the crew encountered a false fire alarm from engine during takeoff and turned back to Vnukovo. The plane crashed while attempting to return to the airport. Aeroflot removed the Tu-104 from service following this accident. [53]
7 February 1981 CCCP-42332 Tu-104A Pushkin 50/50 Soviet Navy flight; 1981 Pushkin Tu-104 crash, failed to take off due to shifting cargo. All military Tu-104's were grounded following this accident. [54]

Specifications (Tu-104B)

Data from Tupolev Tu-104: Aeroflot's first jet,[55] Tupolew / Tupolev Tu-104[56]

General characteristics

  • Crew: 7
  • Capacity: 50–115 passengers
  • Length: 40.06 m (131 ft 5 in)
  • Wingspan: 34.54 m (113 ft 4 in)
  • Height: 11.9 m (39 ft 1 in)
  • Wing area: 183 m2 (1,970 sq ft) less LERX
  • Airfoil: root: PR-1-10S-9 (15.7%); tip: PR-1-10S-9 (12%)[57]
  • Empty weight: 43,800 kg (96,562 lb)
  • Gross weight: 78,100 kg (172,181 lb)
  • Fuel capacity: 21,000 kg (46,297 lb) normal; 26,500 kg (58,422 lb) maximum
  • Powerplant: 2 × Mikulin AM-3M-500 turbojet engines, 95 kN (21,400 lbf) thrust each

Performance

  • Maximum speed: 950 km/h (590 mph, 510 kn)
  • Cruising speed: 750–850 km/h (470–530 mph; 400–460 kn) at 10,000–12,000 m (32,808–39,370 ft)
  • Range: 2,120 km (1,320 mi, 1,140 nmi) with 12,000 kg (26,455 lb) payload and 5,650 kg (12,456 lb) fuel reserve
2,750 km (1,709 mi) with 8,150 kg (17,968 lb) payload and 5,650 kg (12,456 lb) fuel reserve
  • Service ceiling: 12,000 m (39,000 ft)
  • Rate of climb: 10 m/s (2,000 ft/min)
  • Take-off run at MTOW: 2,200 m (7,218 ft)
  • Landing run at normal landing weight: 1,450–1,850 m (4,757–6,070 ft) without brake parachute

In film

A Tu-104 is the supposed aircraft making a flight from London to New York which forms the subject of the 1959 film Jet Storm. Footage of an actual Tu-104 taxiing and taking off is shown near the beginning of the film.

In philately
Tu-104 on 1958 Soviet stamp
Tu-104 on 1969 Soviet stamp

Tu-104 is depicted on Soviet postage stamps of 1958 and 1969.

See also

Related development

Aircraft of comparable role, configuration, and era

Related lists

References
  1. "Reactores Comerciales (1999a) (en: Commercial Jetliners)". Antonio López Ortega (in Spanish). Agualarga Editores S.l. ISBN 84-95088-87-8. Retrieved 2008-09-26.
  2. "Tu 104 That Started The Era Of Jet Airliners In the USSR". englishrussia.com. 29 November 2011. Retrieved 17 June 2020.
  3. Ranter, Harro. "Aviation Safety Network > ASN Aviation Safety Database > Aircraft type index > Tupolev Tu-104 > Tupolev Tu-104 Statistics". aviation-safety.net. Retrieved 26 January 2019.
  4. Accident description for CCCP-L5414 at the Aviation Safety Network. Retrieved on 2015-12-15.
  5. Accident description for CCCP-L5442 at the Aviation Safety Network. Retrieved on 2015-12-15.
  6. "Катастрофа Ту-104А МУТА ГВФ в 215 км от а/п Хабаровск" [Accident Tu-104 215 km from Khabarovsk Airport] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  7. Accident description for CCCP-42362 at the Aviation Safety Network. Retrieved on 2015-12-15.
  8. Accident description for CCCP-42452 at the Aviation Safety Network. Retrieved on 2015-12-15.
  9. "Катастрофа Ту-104А Дальневосточного управления ГВФ близ аэр. Усть-Орда" [Accident Tu-104 near Ust-Orda] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  10. Accident description for CCCP-42357 at the Aviation Safety Network. Retrieved on 2015-12-15.
  11. Accident description for CCCP-42438 at the Aviation Safety Network. Retrieved on 2015-12-15.
  12. "Катастрофа Ту-104Б ЗС УГВФ в Свердловске" [Accident Tu-104 Sverdlovsk] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  13. Accident description for CCCP-42447 at the Aviation Safety Network. Retrieved on 2015-12-15.
  14. "Катастрофа Ту-104Б Северного управления ГВФ в а/п Одессы" [Accident Tu-104 Odessa Airport] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  15. Accident description for CCCP-42388 at the Aviation Safety Network. Retrieved on 2015-12-15.
  16. Accident description for CCCP-42504 at the Aviation Safety Network. Retrieved on 2015-12-15.
  17. Accident description for CCCP-42491 at the Aviation Safety Network. Retrieved on 2015-12-15.
  18. Accident description for CCCP-42370 at the Aviation Safety Network. Retrieved on 2015-12-15.
  19. Accident description for CCCP-42366 at the Aviation Safety Network. Retrieved on 2015-12-15.
  20. "Катастрофа Ту-104А Дальневосточного управления ГВФ близ Хабаровска" [Accident Tu-104 near Khabarovsk] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  21. Accident description for CCCP-42495 at the Aviation Safety Network. Retrieved on 2015-12-15.
  22. Accident description for OK-LDB at the Aviation Safety Network. Retrieved on 2015-12-15.
  23. Accident description for CCCP-42483 at the Aviation Safety Network. Retrieved on 2015-12-15.
  24. Accident description for CCCP-42492 at the Aviation Safety Network. Retrieved on 2015-12-15.
  25. "Катастрофа Ту-104Б Восточно-Сибирского управления ГВФ в районе Иркутска" [Accident Tu-104 near Irkutsk] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  26. Accident description for CCCP-42476 at the Aviation Safety Network. Retrieved on 2015-12-15.
  27. Accident description for CCCP-42436 at the Aviation Safety Network. Retrieved on 2015-12-15.
  28. Accident description for OK-NDD at the Aviation Safety Network. Retrieved on 2015-12-15.
  29. Accident description for CCCP-42405 at the Aviation Safety Network. Retrieved on 2015-12-15.
  30. "Катастрофа Ту-104Б Толмачевского ОАО в а/п Иркутс" [Accident Tu-104 Irkutsk Airport] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  31. Criminal description for CCCP-42490 at the Aviation Safety Network. Retrieved on 2015-12-15.
  32. "Взрыв на борту Ту-104Б Украинского УГА близ аэропорта Внуково" [Explosion on Tu-104 near Vnukovo] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  33. Accident description for CCCP-42408 at the Aviation Safety Network. Retrieved on 2015-12-15.
  34. "Бортовой №: CCCP-42505". Retrieved 11 November 2011.
  35. Accident description for CCCP-42505 at the Aviation Safety Network. Retrieved on 2015-12-15.
  36. Hijacking description for CCCP-42411 at the Aviation Safety Network. Retrieved on 2015-12-15.
  37. "Взрыв на борту и катастрофа Ту-104А Восточно-Сибирского УГА в районе Читы" [Explosion on Tu-104 Chita region] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  38. Accident description for OK-MDE at the Aviation Safety Network. Retrieved on 2015-12-15.
  39. Accident description for CCCP-42506 at the Aviation Safety Network. Retrieved on 2015-12-15.
  40. Accident description for CCCP-42486 at the Aviation Safety Network. Retrieved on 2015-12-15.
  41. Accident description for CCCP-42503 at the Aviation Safety Network. Retrieved on 2015-12-15.
  42. "Катастрофа Ту-104Б Грузинского УГА в а/п Домодедово" [Accident Tu-104 Domodedovo Airport] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  43. Accident description for CCCP-42501 at the Aviation Safety Network. Retrieved on 2015-12-15.
  44. Accident description for CCCP-42472 at the Aviation Safety Network. Retrieved on 2015-12-15.
  45. Accident description for CCCP-42327 at the Aviation Safety Network. Retrieved on 2015-12-15.
  46. "Катастрофа Ту-104А ВС УГА в Иркутске" [Accident Tu-104 Irkutsk] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  47. Accident description for CCCP-42335 at the Aviation Safety Network. Retrieved on 2015-12-15.
  48. Accident description for CCCP-42471 at the Aviation Safety Network. Retrieved on 2015-12-15.
  49. "Катастрофа Ту-104Б Ленинградского ОАО в районе а/п Шереметьево" [Accident Tu-104 Sheremetyevo/Leningrad area] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  50. Accident description for CCCP-42438 at the Aviation Safety Network. Retrieved on 2015-12-15.
  51. Accident description for CCCP-42369 at the Aviation Safety Network. Retrieved on 2015-12-15.
  52. "Катастрофа Ту-104А Дальневосточного УГА в районе а/п Алма-Ата" [Accident Tu-104 near Alma-Ata Airport] (in Russian). airdisaster.ru. Retrieved 2015-12-28.
  53. Accident description for CCCP-42444 at the Aviation Safety Network. Retrieved on 2015-12-15.
  54. Accident description for CCCP-42332 at the Aviation Safety Network. Retrieved on 2015-12-15.
  55. Gordon, Yefim; Rigmant, Vladimir (2007). Tupolev Tu-104: Aeroflot's first jet. Hinkley: Midland. p. 36. ISBN 978-1-85780-265-8.
  56. "Tupolew / Tupolev Tu-104". www.flugzeuginfo.net. Retrieved 26 January 2019.
  57. Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.

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