2022年4月11日 · The RS-68A differs from the RS-68 in having slightly greater thrust, producing 705,000 lbf (3,140 kN) thrust at sea level and 800,000 lbf (3,560 kN) thrust in a vacuum. It was …

2009年7月25日 · RS-68A engine that will be used to power a future upgraded version of the Delta IV Heavy Lift launch vehicle. The hot-fire test was conducted 3:16 p.m. CDT, at NASA's John …

2009年8月9日 · Not sure how this is going to look From the recent Delta IV payload guide page 10-14 GTO Orbit: 35,786 km x 185 km minimum (19,323 nmi x 100 nmi minimum) at 27.0 deg

2014年7月7日 · Could RS-68A with it's ablative nozzle have been clustered under a wide diameter core to make an all liquid HLV? Obviously with SRB's they couldn't survive. On D4H …

2012年10月4日 · 5X RS-68A could lift 3.5M lbs (5X715,000lbs at sea level) 4X RS-68A could lift 2.86M lbs From a Direct J-241 card, the core's dry weight was 148,000lbs, and gross …

2012年6月2日 · Future use of RS-68A on Delta IV « on: 04/30/2012 08:11 pm » Perhaps my google-fu has failed me, but I've not been able to find out which future Delta IV launches other …

2014年8月23日 · If so, using RS-68's for anything more than what they were designed for, a single Delta IV like core and not it a large cluster, is probably not going to work. rockett.jpg …

2012年10月13日 · Re: Slick SLS Block 1 with RS-68A hypothetical Concept « Reply #40 on: 10/08/2012 02:21 am » It is an effect of ascent aerodynamics you understand, where hot …

2009年9月21日 · Re: United Launch Alliance First RS-68A Hot-Fire Engine Test a Success « Reply #41 on: 08/11/2009 05:56 pm » Reading this presentation , there's mention (slide 9) of a …

2010年2月10日 · “The RS-68A certification engine ran very well, and we obtained the data we needed to proceed with additional tests,” said Jim Tibble, RS-68A engine development project …