Chamber pressure 48 bar | Cycle Gas-generator cycle | |
 | ||
Thrust (SL) RS-56-OBA: 207,000 lbf (920.8 kN)RS-56-OSA: 60,500 lbf (269.0 kN) | ||
RS-56 was an American liquid fueled rocket engine, developed by Rocketdyne. RS-56 was derived from the RS-27 rocket engine. 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.
References
RS-56 Wikipedia(Text) CC BY-SA