Tupolev Tu-104

Tu-104
Aeroflot Tupolev Tu-104B at Arlanda Airport in 1972
Role	Airliner
Manufacturer	Tupolev OKB
Designer	Andrei Tupolev
First flight	17 June 1955
Introduction	15 September 1956 (Aeroflot)
Retired	1986
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 1972.

The Tupolev Tu-104 (NATO reporting name: Camel) was a twin-engined medium-range turbojet-powered Soviet airliner and the world's first successful jet airliner. Although it was the fourth jet airliner to fly (following, in order, the British de Havilland Comet, Canadian Avro Canada C102 Jetliner, and French Sud Caravelle), the Tu-104 was the second to enter regular service (with Aeroflot) and the first to provide a sustained and successful service (the Comet had been withdrawn following a series of crashes due to structural failure). The Tu-104 was the sole jetliner operating in the world between 1956 and 1958.

In 1957, Czechoslovak Airlines - ČSA, (now Czech Airlines) became the first airline in the world to fly routes exclusively with jet airliners, using the Tu-104A variant. 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 operations with the Soviet Air Force. Its successors include the Tu-124 (the first turbofan-powered airliner), 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 in the airliner, but the new design adopted a wider, pressurised fuselage designed to accommodate 50 passengers. The prototype (SSSR-L5400) first flew on June 17, 1955 with Yu.L. Alasheyev at the controls at Kharkov plant in Ukraine. It was fitted with drag chute to shorten landing distance by up to 400 metres (1,300 ft).

The arrival of the Tu-104 in London during a 1956 state visit by Nikolai Bulganin and Nikita Khrushchev totally surprised Western observers who, at the time, thought the Soviets lacked the advanced technology required to build a commercial airliner with such performance. By the time production ceased in 1960, about 200 had been built.

The Tu-104 was powered by two Mikulin AM-3 turbojets placed at the wing/fuselage junction (similar to the de Havilland Comet). The crew consisted of 5 people: two pilots, a navigator (placed in the glazed "bomber" nose), a flight engineer and a radio operator (the radio operator was later eliminated). The airplane raised great curiosity by its lavish "Victorian" interior - called so by some Western-hemisphere observers - due to the materials used: mahogany, copper and lace.

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 transitioned into the Tu-104 with relative ease. The Tu-104 was considered tricky to fly, as it was heavy in the air, and had poor response to controls, with a tendency to stall at low speeds. Experience with the Tu-104 led the Tupolev Design Bureau to develop the Tupolev Tu-124, designed for local markets, and subsequently the more commercially successful Tu-134

Operational history

On September 15, 1956, the Tu-104 began revenue service on Aeroflot's Moscow-Omsk-Irkutsk route, replacing the piston-engined 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. 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 re-fueling incident and another to pilot error without fatalities).

In 1959 the plane was leased to Sir Henry Lunn Ltd. (Lunn Poly) of London who used the plane for 12 holidays to Russia and boasted of a 4.5 hours flight.

The Tu-104 continued to be used by Aeroflot throughout the 1960s and 1970s. Some 16 aircraft were lost in crashes (some due to highjackings/bombings). The safety record is comparable to other early jet airliners of its day, but was poor compared to more modern airliners. Aeroflot retired the Tu-104 from civil service in March 1979 following a fatal accident at Moscow. Following this, several aircraft were transferred to the Soviet military, which used them as staff transports and to train cosmonauts in zero gravity. However, after a Tu-104 crash in February 1981 killed 52 people (17 of whom 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 a museum in Ulyanovsk in 1986.

A Tu-104 near Vnukovo Airport

Variants

Data from:

• Tu-104 - initial version seating 50 passengers. It used 2 Mikulin AM-3 each with 6,735 kg of thrust. 29 airframes were built.
• Tu-104 - the first production version, 50 seats, 29 built
• Tu-104A - Improved version appearing in June 1957; continuing improvements in the Mikulin engines (Mikulin AM-3M each with 8,700 kg of thrust) permitted significant growth resulting in a 70-seater variant. The Tu-104A became the definitive production variant. On September 6, 1957, it flew with 20 t of payload at 11,211 m of altitude. On September 24, 1957, it reached 970.8 km/h average speed with a 2 tonne payload. A total of 80 airframes were built, of which six were exported to Czechoslovakia.
• Tu-104B - Further improvements made by stretching fuselage 1.2 meters and fitting with new Mikulin AM-3M-500 turbojets (9,700 kg of thrust each). The Tu-104B was able to accommodate 100 passengers. This variant took advantage of using the newer fuselage from the Tupolev Tu-110 and the existing wings. It began revenue service with Aeroflot on April 15, 1959 on the Moscow-Saint Petersburg route. A total of 95 airframes were built. Most were subsequently were re-equipped as the Tu-104B-115 with 115 seats and a new navigation and flight and radio equipment;
• Tu-104V - The first use of this designation was for a projected 117 seat medium haul version with six-abreast seating. Project cancelled
• Tu-104D - VIP version with two sleeper cabins forward and a 39 seat cabin aft.
• Tu-104G - VIP version for the Federal government with two VIP cabins forward and a 54 seat cabin aft.
• Tu-104E - A higher performance Tu-104 powered by RD16-15 engines giving better fuel economy as well as higher thrust. Two prototypes were converted from Tu-104B's CCCP-42441 and CCCP-42443, but the programme was cancelled in the mid 1960's in favour of the Tu-154.
• 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-104D-85 - Tu-104A airframes rebuilt to accommodate 85 passengers.
• Tu-104V-115 - Tu-104B airframes rebuilt to accommodate 115 passengers, with new radio and navigational equipment.
• Tu-104AK – one unit modified for Zero-G Cosmonaut training
• Tu104-SH - Navigator trainer in two versions

• Tu-104LL –Several serial numbers converted for use in testing Tu-129, Tu-22M electronics, and air to air missile systems (including launch).
• Tu-107 – Proposed military transport version with rear loading ramp and defensive turret armed with paired cannon. Project cancelled
• Tu-110 - Four-engined version intended for export. A number of prototypes were built; project cancelled.
• Tu-118 - A projected turboprop powered medium haul airliner variant to be powered by Kuznetsov TV-2 or NK-8 turboprop engines.
• Tu-124 - Turbofan powered short-haul redesign of the Tu-104.

Former Operators

CSA Czechoslovak Airlines Tu-104A OK-LDA in 1958. This aircraft is preserved at the Prague Aviation Museum, Kbely

Czechoslovakia

• CSA Czechoslovak Airlines - Six aircraft.
• Czechoslovakian Air Force

Mongolia

• Military of Mongolia

Soviet Union

• Aeroflot
• Soviet Air Force

Accidents and incidents

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%). Noted incidents include:

• June 30, 1962 – Aeroflot Flight SSSR-42370 was shot down by an anti-aircraft missile during a training exercise, killing all aboard.
• October 13, 1973 - While on approach to Domodedovo International Airport, an Aeroflot Tu-104 suffered an electrical power failure, disabling the compass and gyros. Due to the difficulty of establishing their heading, the plane crashed into the ground, killing all 5 crew and 114 passengers. This was the largest single accident involving the Tu-104 and led to the aircraft being removed from commercial service.
• May 18, 1974 - A hijacker detonated an explosive device on a scheduled flight from Irkutsk to Chita, it crashed near Lake Baikal killing all aboard.
• February 1981, A Soviet Navy Tu-104A crashed after takeoff killing all aboard, including most of the senior staff of the Soviet Pacific Fleet. The accident was due to improper loading and caused the grounding of all remaining military Tu-104s.

Date	Tail number	Crash Site	Casualties	Brief description
19 Feb 1958	USSR Л5414	USSR Savasleyka	no data	crashed landed after running out of fuel
15 Aug 1958	USSR Л5442	USSR Chita	64/64	stalled and went into spin
17 October 1958	USSR 42362	USSR Kanash	73/73	went into spin
21 October 1960	USSR 42452	USSR Ust-Orda	3/3	unknown
1 February 1961	USSR 42357	USSR Vladivostok	0	rough landing; overran runway
13 March 1961	USSR 42438	USSR Koltsovo	5/5	engine failure after takeoff in storm
10 July 1961	USSR 42447	USSR Odessa	1/85	rough landing in storm
10 July 1961	USSR 42388	USSR Tashkent	0	rough landing
10 July 1961	USSR 42504	USSR Vladivostok	0	rough landing
4 June 1962	USSR 42491	BUL Sophia	5/5	crashed into mountain after engine failure
30 June 1962	USSR 42370	USSR Krasnoyarsk	84/84	mistakenly shot down by anti-aircraft missile
2 September 1962	USSR 42366	USSR Khabarovsk	86/86	lost control on takeoff
25 October 1962	USSR 42495	USSR Sheremetyevo	10/10	Test flight (rudder controls reversed)
16 March 1963	Czechoslovakia OK-LDB	India Bombay	0/0	caught fire during refueling
18 May 1963	USSR 42483	USSR Leningrad	no data	went into spin on landing
18 May 1963	USSR 42492	USSR Irkutsk	32/32	short landing 2 km from runway
9 June 1964	USSR 42476	USSR Novosibirsk	no data	Overran runway while landing in storm
28 April 1969	USSR 42436	USSR Irkutsk	no data	landed 600 meters short of runway
1 June 1970	Czechoslovakia OK-NDD	Libya Tripoli	13/13	crashed 5.5 km short of runway
25 July 1971	USSR 42405	USSR Irkutsk	97/126	landed 200 meters short of runway; caught fire
10 October 1971	USSR 42490	USSR Vnukovo	20/20	explosion in cargo bay on takeoff
23 April 1973	USSR 42505	USSR Leningrad	2/57	failed hijacking; explosion caused depressurization
18 May 1973	USSR 42411	USSR Buryat ASSR	82/82	hijacking on flight from Irkutsk to Chita; exploded mid-air
29 August 1973	Czechoslovakia OK-MDE	Cyprus Nicosia	0/70	rough landing due to pilot error
30 September 1973	USSR 42506	USSR Sverdlovsk	108/108	Mechanical failure on flight between Sverdlovsk — Khabarovsk
13 October 1973	USSR 42486	USSR Domodedovo	119/119	Power failure and loss of control
7 December 1973	USSR 42503	USSR near Moscow	13/72	rough landing in poor weather
5 November 1974	USSR 42501	USSR Chita	0/no data	overran runway
30 August 1975	USSR 42472	USSR Novosibirsk	0/no data	landing gear failed on landing
9 February 1976	USSR 42327	USSR Irkutsk	24/115	crashed on takeoff
17 July 1976	USSR 42335	USSR Chita	0/no data	crashed on takeoff due to overloading
28 November 1976	USSR 42471	USSR Sheremetyevo	72/72	instrument failure, loss of control
1976	USSR 42371	USSR Kiev	no data	engine failure on landing
13 January 1977	USSR 42369	USSR Alma-Ata	96/96	engine failure; mid-air explosion
17 March 1979	USSR 42444	USSR near Moscow	86/106	false alarm on engine in takeoff led to crash while attempting to return to airport
7 February 1981	USSR 42332	USSR Pushkin	52/52	Soviet Navy flight; failed takeoff due to shifting cargo

Specifications (Tu-104B)

Data from^{[citation needed]}

General characteristics

• Crew: 7
• Capacity: 50-100 passengers
• Length: 40.05 m (131 ft 5 in)
• Wingspan: 34.54 m (113 ft 4 in)
• Height: 11.90 m (39 ft 0 in)
• Wing area: 184 m² (1,975 ft²)
• Empty weight: 41,600 kg (91,710 lb)
• Max takeoff weight: 76,000 kg (167,550 lb)
• Powerplant: 2 × Mikulin AM-3M-500 turbojets, 95.1 kN (21,400 lbf) each

Performance

• Maximum speed: 950 km/h (512 knots, 590 mph (950 km/h))
• Range: 2,650 km (1,430 nm, 1,650 mi)
• Service ceiling: 11,500 m (37,730 ft)
• Rate of climb: 10 m/s (2,000 ft/min)

See also

Related development

• Tupolev Tu-16
• Tupolev Tu-107
• Tupolev Tu-110
• Tupolev Tu-124
  

Aircraft of comparable role, configuration and era

• de Havilland Comet
• Boeing 707
  

External links

• Tu-104
• Aerospaceweb.org