Buran (spacecraft)
Buran 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 spaceplanes".
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.
Construction
The construction of the Buran spaceplanes began in 1980, and by 1984 the first full-scale orbiter was rolled-out. The Buran spaceplane was made to be launched on the Soviet Union's super-heavy lift vehicle, Energia. The Buran programme ended in 1993.| Date | Milestone |
| 1980 | Assembly started |
| 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 |
Operational history
Orbital flight
The only orbital launch of a Buran-class orbiter, 1K1 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 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, Buran landed only laterally and 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.
Projected flights
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.Specifications
The mass of Buran is quoted as 62 tons, with a maximum payload of 30 tons, for a total lift-off weight of 105 tons.;Mass breakdown
- Total mass of structure and landing systems:
- Mass of functional systems and propulsion:
- Maximum payload:
- Maximum liftoff weight:
- Length:
- Wingspan:
- Height on gear:
- Payload bay length:
- Payload bay diameter:
- Wing glove sweep: 78 degrees
- Wing sweep: 45 degrees
- Total orbital manoeuvering engine thrust:
- Orbital manoeuvering engine specific impulse:
- Total manoeuvering impulse: 5 kgf-sec
- Total RCS thrust:
- Average RCS specific impulse:
- Normal maximum propellant load:
Fate and destruction
In June 1989, Buran, carried on the back of the Antonov An-225, took part in the 1989 Paris Air Show at Le Bourget Airfield.Together with the Energia rocket, Buran was put in a hangar at the Baikonur Cosmodrome, Kazakhstan.
After the first flight of a Buran shuttle, 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 and 1992 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 the Baikonur Cosmodrome in Kazakhstan collapsed because of a structural failure due to poor maintenance. The collapse killed 8 workers and destroyed one of the Buran craft, which flew the test flight in 1988, as well as a mock-up of an Energia booster rocket.
Two further Buran shuttles, together with an Energia-M rocket prototype carrier are still stored at the base, according to an article in 2017.