RS-56 explained

RS-56
First Date:1991
Country Of Origin:United States
Manufacturer:Rocketdyne
Type:liquid
Status:Retired
Predecessor:RS-27A
Fuel:RP-1
Oxidiser:LOX
Cycle:Gas-generator
Thrust(Sl):RS-56-OBA: 920.8abbr=onNaNabbr=on
RS-56-OSA: 269abbr=onNaNabbr=on
Specific Impulse Vacuum:RS-56-OBA: 299isp
RS-56-OSA: 316isp
Specific Impulse Sea Level:RS-56-OBA: 263isp
RS-56-OSA: 220isp
Chamber Pressure:48order=flipNaNorder=flip
Burn Time:RS-56-OBA: 172
RS-56-OSA: 283 sec
Length:RS-56-OBA: 3.43abbr=onNaNabbr=on
2.7abbr=onNaNabbr=on
Diameter:RS-56-OBA: 2.45abbr=onNaNabbr=on
3.05abbr=onNaNabbr=on
Used In:Atlas II

RS-56 (Rocket System-56) was an American liquid-fueled rocket engine, developed by Rocketdyne. RS-56 was derived from the RS-27 rocket engine,[1] which itself is derived from the Rocketdyne H-1 rocket engine used in the Saturn I and Saturn IB. Two variants of this engine were built, both for use on the Atlas II rocket series. The first, RS-56-OBA, was a booster engine, while the RS-56-OSA was designed for use as a sustainer and produced lower thrust but at a higher specific impulse.[2] [3]

Notes and References

  1. Web site: Atlas IIA(S) Data Sheet. Space Launch Report. 9 January 2016.
  2. Web site: RS-56-OSA. Astronautix. 8 January 2016. dead. https://web.archive.org/web/20140209190702/http://astronautix.com/engines/rs56osa.htm. 9 February 2014.
  3. Web site: RS-56-OBA. Astronautix. 8 January 2016. dead. https://web.archive.org/web/20140209193626/http://astronautix.com/engines/rs56oba.htm. 9 February 2014.