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astronautix.com BOR-5
BOR-5 after flight
BOR-5 after flight - BOR-5 in handling rig after flight

Credit: from Semenov, et. al., Buran, 1995.. 21,854 bytes. 351 x 229 pixels.

Class: Spaceplane. Nation: USSR. Manufacturer: NPO Molniya.

The aerodynamic characteristics of Buran at hypersonic speeds were validated by the BOR-5 1:8 sub-scale model of Buran. The BOR-5 was boosted on sub-orbital trajectories on altitudes of 100 km and velocities of from 4,000 to 7,300 m/s. These proved the handling characteristics, aerodynamic moment, and control effectiveness from Mach 1.5 to Mach 17.5, at Reynolds numbers of from 1.05 to 2.1 and angles of attack from 15 to 40 degrees. They also allowed study of flow separation at the fuselage surface and thermodynamic characteristics of the design. Final results indicated a lift-to-drag ratio of 1.3 at hypersonic speed, 5.0 at Mach 2, and 5.6 at subsonic speed. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

Specification

Total Mass: 1,400 kg.

BOR-5 Chronology

04 July 1983 BOR-5 Flight 1 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

06 June 1984 BOR-5 Flight 2 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP. Mass: 1,400 kg.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

17 April 1985 BOR-5 Flight 3 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP. Mass: 1,400 kg.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

25 December 1986 BOR-5 Flight 4 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP. Mass: 1,400 kg.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

27 August 1987 BOR-5 Flight 5 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP. Mass: 1,400 kg.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

22 June 1988 BOR-5 Flight 6 Program: Buran. Launch Site: Kapustin Yar . Launch Vehicle: Kosmos 65MP. Mass: 1,400 kg.

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered.

Bibliography:

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Last update 3 May 2001.
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© Mark Wade, 2001 .