Buran Program
The Soviet reusable spacecraft program Buran ("Бура́н" meaning "Snowstorm" or "Blizzard" in Russian) began in 1974 at TsAGI as a response to the United States Space Shuttle program.[1] The project was the largest and the most expensive in the history of Soviet space exploration. The Buran completed one unmanned spaceflight in 1988 before its cancellation in 1993. The Buran spacecraft was similar in appearance to the NASA Space Shuttle, and was destroyed in the Buran hangar collapse on May 12, 2002.
Background
The Soviet reusable space-craft program has its roots in the very beginning of the space age, the late 1950s. The idea of Soviet reusable space flight is very old, though it was neither continuous, nor consistently organized. Before Buran, no project of the program reached production.
The idea saw its first iteration in the Burya high-altitude jet aircraft, which reached the prototype stage. Several test flights are known, before it was cancelled by order of the Central Committee. The Burya had the goal of delivering a nuclear payload, presumably to the United States, and then returning to base. The cancellation was based on a final decision to develop ICBMs. The next iteration of the idea was Zvezda from the early 1960s, which also reached a prototype stage. Decades later, another project with the same name was used as a service module for the International Space Station. After Zvezda, there was a hiatus in reusable projects until Buran.
Development
The development of the Buran began in the early 1970s as a response to the U.S. Space Shuttle program. Soviet officials were concerned about a perceived military threat posed by the US Space Shuttle. In their opinion, the Shuttle's 30-ton payload-to-orbit capacity and, more significantly, its 15-ton payload return capacity, were a clear indication that one of its main objectives would be to place massive experimental laser weapons into orbit that could destroy enemy missiles from a distance of several thousands of kilometers. Their reasoning was that such weapons could only be effectively tested in actual space conditions and that in order to cut their development time and save costs it would be necessary to regularly bring them back to Earth for modifications and fine-tuning. [2] Soviet officials were also concerned that the US Space Shuttle could make a sudden dive into the atmosphere to drop bombs on Moscow, despite the fact that such a scenario was physically impossible.[3]
While the Soviet engineers favoured a smaller, lighter lifting body vehicle, the military leadership pushed for a direct, full scale copy of the double-delta wing Space Shuttle, in an effort to maintain the strategic parity between the superpowers.
NPO Molniya conducted all development under the lead of Gleb Lozino-Lozinskiy.
The construction of the shuttles began in 1980, and by 1984 the first full-scale Buran was rolled out. The first suborbital test flight of a scale-model (BOR-5) took place as early as July 1983. As the project progressed, five additional scale-model flights were performed. A test vehicle was constructed with four jet engines mounted at the rear; this vehicle is usually referred to as OK-GLI, or as the "Buran aerodynamic analogue". The jets were used to take off from a normal landing strip, and once it reached a designated point, the engines were cut and OK-GLI glided back to land. This provided invaluable information about the handling characteristics of the Buran design, and significantly differed from the carrier plane/air drop method used by the USA and the Enterprise test craft. Twenty-four test flights of OK-GLI were performed after which the shuttle was "worn out".
Flights
The only orbital launch of the (unmanned) Buran shuttle 1.01 was at 3:00 UTC on 15 November 1988. It was lifted into orbit by the specially designed Energia booster rocket. The life support system was not installed and no software was installed on the CRT displays.[4] The shuttle orbited the Earth twice in 206 minutes of flight. On its return, it performed an automated landing on the shuttle runway at Baikonur Cosmodrome.[5]
[edit] Planned flights
The planned flights for the shuttles in 1989, before the downsizing of the project and eventual cancellation, were:[6]
1991 - Shuttle Ptichka unmanned first flight, duration 1–2 days.
1992 - Shuttle Ptichka unmanned second flight, duration 7–8 days. Orbital maneuvers and space station approach test.
1993 - Shuttle Buran unmanned second flight, duration 15–20 days.
1994 - Shuttle 2.01 first manned space test flight, duration of 24 hours. Craft equipped with life-support system and with two ejection seats. Crew would consist of only two cosmonauts with Igor Volk as commander, and Aleksandr Ivanchenko as flight engineer.
Second manned space test flight, crew would consist of only two cosmonauts.
Third manned space test flight, crew would consist of only two cosmonauts.
Fourth manned space test flight, crew would consist of only two cosmonauts.
The planned unmanned second flight of the Ptichka was changed in 1991 to the following:
December 1991 - Shuttle 1.02 - informally "Ptichka" unmanned second flight, with a duration of 7–8 days. Orbital maneuvers and space station approach test:
automatic docking with Mir's Kristall module
crew transfer from Mir to the shuttle, with testing of some of its systems in the course of twenty-four hours, including the remote manipulator
undocking and autonomous flight in orbit
docking of the manned Soyuz-TM 101 with the shuttle
crew transfer from the Soyuz to the shuttle and onboard work in the course of twenty-four hours
automatic undocking and landing
Cancellation
After the first flight, the project 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, meaning "little bird") and 1992 (Shuttle 2.01) were never completed. The project was officially terminated on June 30, 1993 by President Boris Yeltsin. At the time of its cancellation, 20 billion roubles had been spent on the Buran program.[7]
The program was designed to boost national pride, carry out research, and meet technological objectives similar to those of the U.S. shuttle program, including resupply of the Mir space station, which was launched in 1986 and remained in service until 2001. When Mir was finally visited by a space shuttle, the visitor was a U.S. shuttle, not Buran.
The Buran SO, a docking module that was to be used for rendezvous with the Mir space station, was refitted for use with the U.S. Space Shuttles during the Shuttle-Mir missions. [8]
Buran program - Wikipedia, the free encyclopedia
The Soviet reusable spacecraft program Buran ("Бура́н" meaning "Snowstorm" or "Blizzard" in Russian) began in 1974 at TsAGI as a response to the United States Space Shuttle program.[1] The project was the largest and the most expensive in the history of Soviet space exploration. The Buran completed one unmanned spaceflight in 1988 before its cancellation in 1993. The Buran spacecraft was similar in appearance to the NASA Space Shuttle, and was destroyed in the Buran hangar collapse on May 12, 2002.
Background
The Soviet reusable space-craft program has its roots in the very beginning of the space age, the late 1950s. The idea of Soviet reusable space flight is very old, though it was neither continuous, nor consistently organized. Before Buran, no project of the program reached production.
The idea saw its first iteration in the Burya high-altitude jet aircraft, which reached the prototype stage. Several test flights are known, before it was cancelled by order of the Central Committee. The Burya had the goal of delivering a nuclear payload, presumably to the United States, and then returning to base. The cancellation was based on a final decision to develop ICBMs. The next iteration of the idea was Zvezda from the early 1960s, which also reached a prototype stage. Decades later, another project with the same name was used as a service module for the International Space Station. After Zvezda, there was a hiatus in reusable projects until Buran.
Development
The development of the Buran began in the early 1970s as a response to the U.S. Space Shuttle program. Soviet officials were concerned about a perceived military threat posed by the US Space Shuttle. In their opinion, the Shuttle's 30-ton payload-to-orbit capacity and, more significantly, its 15-ton payload return capacity, were a clear indication that one of its main objectives would be to place massive experimental laser weapons into orbit that could destroy enemy missiles from a distance of several thousands of kilometers. Their reasoning was that such weapons could only be effectively tested in actual space conditions and that in order to cut their development time and save costs it would be necessary to regularly bring them back to Earth for modifications and fine-tuning. [2] Soviet officials were also concerned that the US Space Shuttle could make a sudden dive into the atmosphere to drop bombs on Moscow, despite the fact that such a scenario was physically impossible.[3]
While the Soviet engineers favoured a smaller, lighter lifting body vehicle, the military leadership pushed for a direct, full scale copy of the double-delta wing Space Shuttle, in an effort to maintain the strategic parity between the superpowers.
NPO Molniya conducted all development under the lead of Gleb Lozino-Lozinskiy.
The construction of the shuttles began in 1980, and by 1984 the first full-scale Buran was rolled out. The first suborbital test flight of a scale-model (BOR-5) took place as early as July 1983. As the project progressed, five additional scale-model flights were performed. A test vehicle was constructed with four jet engines mounted at the rear; this vehicle is usually referred to as OK-GLI, or as the "Buran aerodynamic analogue". The jets were used to take off from a normal landing strip, and once it reached a designated point, the engines were cut and OK-GLI glided back to land. This provided invaluable information about the handling characteristics of the Buran design, and significantly differed from the carrier plane/air drop method used by the USA and the Enterprise test craft. Twenty-four test flights of OK-GLI were performed after which the shuttle was "worn out".
Flights
The only orbital launch of the (unmanned) Buran shuttle 1.01 was at 3:00 UTC on 15 November 1988. It was lifted into orbit by the specially designed Energia booster rocket. The life support system was not installed and no software was installed on the CRT displays.[4] The shuttle orbited the Earth twice in 206 minutes of flight. On its return, it performed an automated landing on the shuttle runway at Baikonur Cosmodrome.[5]
[edit] Planned flights
The planned flights for the shuttles in 1989, before the downsizing of the project and eventual cancellation, were:[6]
1991 - Shuttle Ptichka unmanned first flight, duration 1–2 days.
1992 - Shuttle Ptichka unmanned second flight, duration 7–8 days. Orbital maneuvers and space station approach test.
1993 - Shuttle Buran unmanned second flight, duration 15–20 days.
1994 - Shuttle 2.01 first manned space test flight, duration of 24 hours. Craft equipped with life-support system and with two ejection seats. Crew would consist of only two cosmonauts with Igor Volk as commander, and Aleksandr Ivanchenko as flight engineer.
Second manned space test flight, crew would consist of only two cosmonauts.
Third manned space test flight, crew would consist of only two cosmonauts.
Fourth manned space test flight, crew would consist of only two cosmonauts.
The planned unmanned second flight of the Ptichka was changed in 1991 to the following:
December 1991 - Shuttle 1.02 - informally "Ptichka" unmanned second flight, with a duration of 7–8 days. Orbital maneuvers and space station approach test:
automatic docking with Mir's Kristall module
crew transfer from Mir to the shuttle, with testing of some of its systems in the course of twenty-four hours, including the remote manipulator
undocking and autonomous flight in orbit
docking of the manned Soyuz-TM 101 with the shuttle
crew transfer from the Soyuz to the shuttle and onboard work in the course of twenty-four hours
automatic undocking and landing
Cancellation
After the first flight, the project 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, meaning "little bird") and 1992 (Shuttle 2.01) were never completed. The project was officially terminated on June 30, 1993 by President Boris Yeltsin. At the time of its cancellation, 20 billion roubles had been spent on the Buran program.[7]
The program was designed to boost national pride, carry out research, and meet technological objectives similar to those of the U.S. shuttle program, including resupply of the Mir space station, which was launched in 1986 and remained in service until 2001. When Mir was finally visited by a space shuttle, the visitor was a U.S. shuttle, not Buran.
The Buran SO, a docking module that was to be used for rendezvous with the Mir space station, was refitted for use with the U.S. Space Shuttles during the Shuttle-Mir missions. [8]
Buran program - Wikipedia, the free encyclopedia