BOR-4

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BOR-4S
BOR-4S at MAKS Airshow in Zhukovskiy, 2005
BOR-4S nº401 at MAKS Airshow in Zhukovskiy, 2005
Role Uncrewed 1:2 scale re-entry test vehicle
National origin Soviet Union
First flight 5 December 1980
Number built 7

The BOR-4 (БОР-4 Russian: Беспилотный Орбитальный Ракетоплан 4, Bespilotnyi Orbital'nyi Raketoplan 4, "Unpiloted Orbital Rocketplane 4") flight vehicle is a scaled (1:2) prototype of the Soviet Spiral VTHL (vertical takeoff, horizontal landing) spaceplane. An uncrewed, subscale spacecraft, its purpose was to test the heatshield tiles and reinforced carbon-carbon for the Buran space shuttle, then under development.[1]

Several of them were built and flown between 1982 and 1984 from the Kapustin Yar launch site at speeds of up to Mach 25, using K65-RB5 variant of Kosmos-3M launch vehicle.[2] After reentry, they were designed to parachute to an ocean splashdown for recovery by the Soviet Navy. The testing was nearly identical to that carried out by the US Air Force ASSET program in the 1960s, which tested the heatshield design for the X-20 Dyna-Soar. On 16 March 1983[3]: 207  a Royal Australian Air Force P-3 Orion reconnaissance aircraft captured the first Western images of the craft as it was recovered by a Soviet ship near the Cocos Islands.[4]

Flights[edit]

Seven BOR were built, and four confirmed flights took place between 1982 and 1984.[5][6] All orbital flights were launched using Kosmos-3M rockets at the Kapustin Yar launch complex in Astrakhan Oblast, Russia[7]

BOR-4 test flights[7]
Mission Launch date
(UTC)
Landing date
(UTC)
Recovery site Orbit Duration
(in orbit)
Outcome
Kosmos 1374 3 June 1982
21:36
3 June 1982
23:04
17°S 98°E / 17°S 98°E / -17; 98
Indian Ocean
158 x 204 km 1 hour, 28 minutes Success[3]
Kosmos 1445 15 March 1983
22:33
16 March 1983
00:25
Indian Ocean 158 x 208 km 1 hour, 52 minutes Success
Kosmos 1517 27 December 1983
10:04
27 December 1983
11:46
Black Sea 212 x 217 km 1 hour, 42 minutes Success
Kosmos 1614 19 December 1984
04:04
19 December 1984
05:26
Black Sea 174 x 223 km 1 hour, 22 minutes Partial failure. Spacecraft lost at sea during recovery[3]

Current locations[edit]

See also[edit]

References[edit]

  1. ^ Grayzeck, Edwin.J. "NASA - National Space Science Data Center - Spacecraft - Details: Cosmos 1517". NSSDC Master Catalog. National Aeronautics & Space Administration. Archived from the original on 19 December 2022. Retrieved 16 January 2015.
  2. ^ "K65-RB5". Gunter's Space Page. Retrieved 14 May 2024.
  3. ^ a b c Turnill, Reginald, ed. (August 1987). Jane's Spaceflight Directory. Jane's Information Group. ISBN 0710608381.
  4. ^ Hodges, Jim (23 June 2011). "They're Trying to Make a Dream Come True". The Researcher News. NASA Langley Research Center. Archived from the original on 3 May 2022.
  5. ^ Petrovitch, Vassili. "BOR Characteristic". buran-energia.com. Archived from the original on 28 September 2022. Retrieved 12 February 2016.
  6. ^ Bauduin, Pierre (3 March 2007). "Unmanned Orbital Rocket Planes type "BOR"". Weebau Spaceflight Encyclopedia. Archived from the original on 16 January 2021. Retrieved 12 February 2016.
  7. ^ a b Mark Wade. "BOR-4". www.astronautix.com. Encyclopedia Astronautica. Retrieved 30 May 2024.
  8. ^ a b "BOR: Où les voir ?" [BOR: Where to see them?]. kosmonavtika (in French). Archived from the original on 23 January 2021. Retrieved 12 February 2016.

External links[edit]