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Sputnik (rocket)

From Wikipedia, the free encyclopedia
Small carrier rocket
For the Sputnik 11A59 rocket, seePolyot (rocket). For other uses, seeSputnik (disambiguation).
Not to be confused withSputnik 1 orSputnik spacecraft.
Sputnik rocket
FunctionEarly (first)carrier rocket
ManufacturerOKB-1
Country of originUSSR
Size
Height8K71PS: 30,000 mm (98 ft)
8A91: 31,100 mm (102.0 ft)
Diameter2,990 mm (9.81 ft)
Mass8K71PS: 267,000 kg (589,000 lb)
8A91: 269,300 kg (593,700 lb)
Stages3
Capacity
Payload toLEO (8K71PS)
Mass8K71PS: 500 kg (1,100 lb)
8A91: 1,327 kg (2,926 lb)
Associated rockets
FamilyR-7
ComparableVanguard
Juno I
Launch history
StatusRetired (No Longer In Use)
Launch sitesLC-1/5,Baikonur
Total launches4 (2 8K71PS, 2 8A91)
Success(es)3
Failure1 (8A91)
First flight8K71PS: 4 October 1957
8A91: 27 April 1958
Last flight8K71PS: 3 November 1957
8A91: 15 May 1958
Carries passengers or cargoSputnik 1
Sputnik 2
Sputnik 3
Boosters (Block B, V, G, D)
No. boosters4
Powered by1RD-107
Maximum thrust970 kN (220,000 lbf)
Specific impulse306 s
Burn time120 s
PropellantLOX/Kerosene
First stage (Block A)
Powered by1RD-108
Maximum thrust912 kN (205,000 lbf)
Specific impulse308 s
Burn time330 s
PropellantLOX/Kerosene

TheSputnik rocket was an uncrewedorbitalcarrier rocket designed bySergei Korolev in theSoviet Union, derived from theR-7 SemyorkaICBM. On 4 October 1957, it was used to perform the world's firstsatellite launch, placingSputnik 1 into alow Earth orbit.

Two versions of the Sputnik were built, the Sputnik-PS (GRAU index 8K71PS), which was used to launchSputnik 1 and laterSputnik 2, and the Sputnik (8A91), which failed to launch a satellite in April 1958, and subsequently launchedSputnik 3 on 15 May 1958.[1]

A later member of theR-7 family, thePolyot, used the same configuration as the Sputnik rocket, but was constructed fromVoskhod components. Because of the similarity, the Polyot was sometimes known as the Sputnik 11A59.

Specifications

[edit]
  • First Stage: Block B, V, G, D (four strap-on boosters)
    • Gross mass: 43.0 tons
    • Empty mass: 3.400 tons
    • Thrust (vac): 4 × 99,000 kgf = 396 Mgf (3.89 MN)
    • Isp: 306 s (3,000 N·s/kg)
    • Burn time: 120 s (2 min)
    • Isp (sl): 250 s (2,450 N·s/kg)
    • Diameter: 2,680 millimetres (8.79 ft)
    • Span: 2,680 millimetres (8.79 ft)
    • Length: 1,920 millimetres (6.30 ft) (without nozzles)
    • Propellants:LOX/Kerosene
    • Engines: 1 xRD-107-8D74PS per booster = 4
  • Second Stage: Block A (core stage)
    • Gross mass: 94.0 tons
    • Empty mass: 7.495 tons
    • Thrust (vac): 99,000 kgf (970 kN)
    • Isp: 308 s (3,020N·s/kg)
    • Burn time: 310 s (5 min 10 s)
    • Isp (sl): 241 s (2,360 N·s/kg)
    • Diameter: 2,950 millimetres (9.68 ft)
    • Span: 2,950 millimetres (9.68 ft)
    • Length: 28,000 millimetres (92 ft)
    • Propellants:LOX/Kerosene
    • Engine: 1 xRD-108-8D75PS
  • Total mass: 267 tons (589,000 lb)
  • Total span: 10,303 millimetres (33.802 ft)
  • LEO payload: 500 kg
  • Total liftoff thrust: 3.89 MN
Some R-7 variants

Sputnik 8A91

[edit]

TheSputnik 8A91 had more powerful 8D76 and 8D77 engines installed,[2] increasing its payload capacity, and allowing it to launch much heavier satellites thanSputnik 1 andSputnik 2. It was launched two times, in 1958.[3] The first launch, on 27 April, failed due to vibrations that unexpectedly occurred during the flight along thelongitudinal axis of the rocket. On 15 May, it successfully launchedSputnik 3.[4][5]

Sputnik specifications

[edit]
  • Stage number: 0 - Strap-on boosters; 4 x Sputnik 8A91-0
    • Gross mass: 43.0 tons
    • Empty mass: 3.400 tons
    • Thrust (vac): 4 × 99,000 kgf = 396 Mgf (3.89 MN)
    • Isp: 310 s (3,040 N·s/kg)
    • Burn time: 130 s (2 min 10 s)
    • Isp (sl): 252 s (2,470 N·s/kg)
    • Diameter: 2,680 millimetres (8.79 ft)
    • Span: 2,680 millimetres (8.79 ft)
    • Length: 19,200 millimetres (63.0 ft) (without nozzles)
    • Propellants: LOX/Kerosene
    • Engines: 1 xRD-107-8D76 per booster (4 total)
  • Stage number: 1 - Core stage; 1 x Sputnik 8A91-1
    • Gross mass: 95.0 tons
    • Empty mass: 7.100 tons
    • Thrust (vac): 82,000 kgf (804 kN)
    • Isp: 315 s (3,090 N·s/kg)
    • Burn time: 360 s (6 min)
    • Isp (sl): 246 s (2,410 N·s/kg)
    • Diameter: 2,950 millimetres (9.68 ft)
    • Length:28,000 millimetres (92 ft)
    • Propellants: LOX/Kerosene
    • Engine: 1 x RD-108-8D77
  • Total mass: 269.3 tons (593,700 lb)[6]
  • Total span: 10,303 millimetres (33.802 ft)
  • LEO payload: 1,327 kg (2,925 lb)
  • Total liftoff thrust: 385,950 kgf (3.784 MN, 850,870lbf)

See also

[edit]

SATCAT (No. 1. The satellite has SATCAT No. 2.[7])

References

[edit]
  1. ^(in Russian)Sputnik RocketArchived 2005-01-03 at theWayback Machine
  2. ^"РД-107 и РД-108 | RD-107 and RD-108". lpre.de. Retrieved2015-12-24.
  3. ^"Jonathan McDowell's launch log". planet4589.org. Retrieved2015-12-24.
  4. ^(in Russian)Soviet Solar Cells on Orbit
  5. ^"Sputnik 3". astronautix.com. Archived fromthe original on 2013-11-08. Retrieved2015-12-24.
  6. ^"Sputnik 8A91".astronautix.com. Retrieved13 May 2023.
  7. ^"SL-1 R/B".n2yo.com.
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