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Rocketdyne S-3D

The Rocketdyne S-3D (Air Force designation LR79)[1] was 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 134,908 pounds of thrust (600.1 kN) at sea level.

The S-3 was based on the Redstone engine,[2] and is part of the LR79 family,[3][4][1] used on the PGM-19 Jupiter and PGM-17 Thor missiles,[5][2][6] and on the Juno II rocket.[7][8][9][10] Other members of the LR79 engine family include: XLR71-NA-1, B-2C, XLR83-NA-1, LR79-7, S-3D, XLR89-1, MB-3-1, X-1, LR83-NA-1, H-1, LR89-5, XLR89-5, S-3, LR89-7, MB-3-J, MB-3, MB-3-3, RZ.2, H-1c, H-1b, RS-27, RS-27A R, RS-56-OBA and RS-27C.[3]

A second stage with four S-3 engines was considered for the Saturn A-2 study.[11] Its design was used later as the basis for the H-1 rocket engine of the Saturn I,[12][13][5] and the Rolls-Royce RZ.2 of the Blue Streak.

Specifications

Rocketdyne S-3D:[7]

Rocketdyne S-3: [14]

  • First flight: 1957
  • Vehicles: PGM-19 Jupiter
  • Thrust: 600.1 kN (134908 lbf).
  • Specific impulse: 282 s.
  • Burn time: 247 s.
  • First flight: 1958
  • Vehicles: Juno II, Saturn A-2[11]
  • 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. Rocketdyne LR79 Rocket Engine National Museum of the United States Air Force^
  2. Jupiter S-3 Rocket Engine airandspace.si.edu, retrieved 2024-10-28^
  3. Mark Wade. LR79 Encyclopedia Astronautica, retrieved 2024-07-29^
  4. Rocketdyne LR79 National Museum of the U.S. Air Force^
  5. Roger E. Bilstein. Stages to Saturn: A Technological History of the Apollo/Saturn Launch Vehicles National Aeronautics and Space Administration, NASA History Office, 1996^
  6. Jupiter Family Gunter's Space Page, retrieved 2024-10-28^
  7. Mark Wade. S-3D Encyclopedia Astronautica^
  8. Mark Wade. Jupiter Encyclopedia Astronautica^
  9. Rocket Engine, Liquid Fuel, S-3D for Jupiter Missile airandspace.si.edu, retrieved 2024-10-28^
  10. Juno-2 Gunter's Space Page, retrieved 2024-10-28^
  11. Saturn A-2 2016-12-28, retrieved 2024-10-28^
  12. S-3D Rocket Engine Overview heroicrelics.org, retrieved 2024-10-28^
  13. S-3D/LR-79 Engine heroicrelics.org, retrieved 2024-10-28^
  14. S-3 www.astronautix.com, retrieved 2024-10-28^