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Rocketdyne S-3D

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(Redirected from LR79) American liquid rocket engine
S-3D
S-3D engine at the National Air and Space Museum
Country of originUnited States
ManufacturerRocketdyne
ApplicationBooster
SuccessorH-1
StatusRetired
Liquid-fuel engine
PropellantLOX / RP-1
CycleGas Generator
Configuration
Chamber1
Performance
Thrust, sea-level134908 lbf (600.1 kN)
Specific impulse, sea-level247 seconds (2.42 km/s)
Used in
PGM-19 Jupiter, PGM-17 Thor, Juno II, Saturn A-2

The Rocketdyne S-3D (Air Force designation LR79) is an American liquid rocket engine produced by Rocketdyne (a division of North American Aviation) between 1956 and 1961. It was a gas generator, pump-fed engine, using a liquid oxygen (LOX) and RP-1 (kerosene) propellant combination, capable of producing 134908 pounds of thrust (600.1 kN) at sea level.

The S-3 was based on the Redstone engine, and is part of LR79 family, used on the PGM-19 Jupiter and PGM-17 Thor missiles, and on the Juno II rocket.

A second stage with four S-3 engines was considered for the Saturn A-2 study.

Simplification of the S-3D engine, via the unillustrated X-1, to the Saturn I's H-1

Its design was used later as the basis for the H-1 rocket engine of the Saturn I, and the Rolls-Royce RZ.2 of the Blue Streak.

Specifications

Rocketdyne S-3D:

  • First flight: 1957
  • Vehicles: PGM-19 Jupiter
  • Thrust: 600.1 kN (134908 lbf).
  • Specific impulse: 282 s.
  • Burn time: 247 s.

Rocketdyne S-3:

  • First flight: 1958
  • Vehicles: Juno II, Saturn A-2
  • Thrust: 667.2 kN (149993 lbf).
  • Specific impulse: 282 s.
  • Burn time: 182 s.
  • Diameter: 2.67 m (8.75 ft).
  • Dry mass: 725 kg (1,598 lb)

References

  1. ^ "S-3D/LR-79 Engine". heroicrelics.org. Retrieved 2024-10-28.
  2. ^ "Rocketdyne LR79 Rocket Engine". National Museum of the United States Air Force.
  3. ^ Wade, Mark. "S-3D". Encyclopedia Astronautica. Archived from the original on November 7, 2016.
  4. ^ "Jupiter S-3 Rocket Engine | National Air and Space Museum". airandspace.si.edu. Retrieved 2024-10-28.
  5. Wade, Mark. "LR79". Encyclopedia Astronautica. Retrieved 2024-07-29.
  6. "Rocketdyne LR79". National Museum of the U.S. Air Force.
  7. ^ Bilstein, Roger E. (1996). Stages to Saturn: A Technological History of the Apollo/Saturn Launch Vehicles. National Aeronautics and Space Administration, NASA History Office. pp. 29, 142. ISBN 978-0-16-048909-9.
  8. "Jupiter Family". Gunter's Space Page. Retrieved 2024-10-28.
  9. Wade, Mark. "Jupiter". Encyclopedia Astronautica. Archived from the original on October 10, 2011.
  10. "Rocket Engine, Liquid Fuel, S-3D for Jupiter Missile | National Air and Space Museum". airandspace.si.edu. Retrieved 2024-10-28.
  11. "Juno-2". Gunter's Space Page. Retrieved 2024-10-28.
  12. ^ "Saturn A-2". 2016-12-28. Archived from the original on 2016-12-28. Retrieved 2024-10-28.
  13. "S-3D Rocket Engine Overview". heroicrelics.org. Retrieved 2024-10-28.
  14. "S-3". www.astronautix.com. Retrieved 2024-10-28.
Rocket engines and solid motors for orbital launch vehicles
Liquid
fuel
Cryogenic
Hydrolox
(LH2 / LOX)
Methalox
(CH4 / LOX)
Semi-
cryogenic
Kerolox
(RP-1 / LOX)
Storable
Hypergolic (Aerozine,
UH 25, MMH, or UDMH
/ N2O4, MON, or HNO3)
Other
Solid
fuel
  • * Different versions of the engine use different propellant combinations
  • Engines in italics are under development
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