Buran (Russian: Бура́н, IPA: [bʊˈran], meaning "Snowstorm" or "Blizzard"; GRAU index serial number: 11F35 1K, construction number: 1.01) was the first spaceplane to be produced as part of the Soviet/Russian Buran programme. Besides describing the first operational Soviet/Russian shuttle orbiter, "Buran" was also the designation for the entire Soviet/Russian spaceplane project and its orbiters, which were known as "Buran-class orbiters".
Buran at the 1989 Paris Air Show
|Named after||Russian word meaning "Snowstorm" or "Blizzard"|
|Status||Destroyed (12 May 2002)|
|First flight||15 November 1988|
|No. of missions||1|
|No. of orbits||2|
Buran completed one uncrewed spaceflight in 1988, and was destroyed in 2002 when the hangar it was stored in collapsed. The Buran-class orbiters used the expendable Energia rocket, a class of super heavy-lift launch vehicle.
The construction of the Buran spacecraft began in 1980, and by 1984 the first full-scale orbiter was rolled-out. The Buran spacecraft was made to be launched on the Soviet Union's super-heavy lift vehicle, Energia. The Buran programme ended in 1993.
|August 1983||Fuselage delivery to NPO Energia|
|March 1984||Start of comprehensive electrical testing|
|December 1984||Delivery to Baikonur|
|April 1986||Start of final assembly|
|15 November 1987||Final assembly completed|
|15 November 1987 – 15 February 1988||Testing in MIK OK|
|19 May – 10 June 1988||Test rollout|
|15 November 1988||Orbital flight (1K1)|
The only orbital launch of a Buran-class orbiter, 1K1 (first orbiter, first flight) occurred at 03:00:02 UTC on 15 November 1988 from Baikonur Cosmodrome launch pad 110/37. Buran was lifted into space, on an uncrewed mission, by the specially designed Energia rocket. The automated launch sequence performed as specified, and the Energia rocket lifted the vehicle into a temporary orbit before the orbiter separated as programmed. After boosting itself to a higher orbit and completing two orbits around the Earth, the ODU (Russian: объединённая двигательная установка, сombined propulsion system) engines fired automatically to begin the descent into the atmosphere, return to the launch site, and horizontal landing on a runway.
After making an automated approach to Site 251, Buran touched down under its own control at 06:24:42 UTC and came to a stop at 06:25:24, 206 minutes after launch. Despite a lateral wind speed of 61.2 kilometres per hour (38.0 mph), Buran landed only 3 metres (9.8 ft) laterally and 10 metres (33 ft) longitudinally from the target mark. It was the first spaceplane to perform an uncrewed flight, including landing in fully automatic mode. It was later found that Buran had lost only eight of its 38,000 thermal tiles over the course of its flight.
In 1989, it was projected that Buran would have an uncrewed second flight by 1993, with a duration of 15–20 days. Although the Buran programme was never officially cancelled, the dissolution of the Soviet Union led to funding drying up and this never took place.
- Mass breakdown
- Total mass of structure and landing systems: 42,000 kg (93,000 lb)
- Mass of functional systems and propulsion: 33,000 kg (73,000 lb)
- Maximum payload: 30,000 kg (66,000 lb)
- Maximum liftoff weight: 105,000 kg (231,000 lb)
- Length: 36.37 m (119.3 ft)
- Wingspan: 23.92 m (78.5 ft)
- Height on gear: 16.35 m (53.6 ft)
- Payload bay length: 18.55 m (60.9 ft)
- Payload bay diameter: 4.65 m (15.3 ft)
- Wing glove sweep: 78 degrees
- Wing sweep: 45 degrees
- Total orbital manoeuvering engine thrust: 17,600 kgf (173,000 N; 39,000 lbf)
- Orbital manoeuvring engine specific impulse: 362 seconds (3.55 km/s)
- Total manoeuvring impulse: 5 kgf-sec (11 lbf-sec)
- Total RCS thrust: 14,866 kgf (145,790 N; 32,770 lbf)
- Average RCS specific impulse: 275–295 seconds (2.70–2.89 km/s)
- Normal maximum propellant load: 14,500 kg (32,000 lb)
Unlike the US Space Shuttle, which was propelled by a combination of solid boosters and the orbiter's own liquid-propellant engines fuelled from a large tank, the Soviet/Russian launch system used thrust from each booster's RD-170 liquid oxygen/kerosene engine (each with 4 nozzles), developed by Valentin Glushko, and another four RD-0120 liquid oxygen/liquid hydrogen engines attached to the central block.
Fate and destructionEdit
After the first flight of a Buran spacecraft, the programme was suspended due to lack of funds and the political situation in the Soviet Union. The two subsequent orbiters, which were due in 1990 (informally Ptichka) and 1992 (2.01) were never completed. The programme was officially terminated on 30 June 1993, by President Boris Yeltsin. At the time of its cancellation, 20 billion rubles had been spent on the Buran programme.
On 12 May 2002, a hangar roof at Baikonur collapsed because of a structural failure due to poor maintenance. The collapse killed eight workers and destroyed the Buran spacecraft as well as a mock-up of an Energia booster rocket.
Two Buran-class orbiters (one for ground use and one that was 90% ready to spaceflight), together with an Energia-M rocket prototype carrier are still stored at the base, according to an article in 2017.
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