This document is quite old now but I've only just seen it on NTRS.Advanced Booster EDRR.First info I've seen about the NG tanks.
This document is quite old now but I've only just seen it on NTRS.Advanced Booster EDRR.
Is a hydrogen fueled booster even competing ?!
Quote from: spectre9 on 05/09/2013 09:50 pmThis document is quite old now but I've only just seen it on NTRS.Advanced Booster EDRR.An intriguing note on Aerojet's high performance booster concept:" Enhances performance - allows the use of a smaller booster for a given thrust level (RP allows for smaller booster due to net density impulse of RP over hydrogen )"Is a hydrogen fueled booster even competing ?!
Quote from: renclod on 05/17/2013 09:14 amIs a hydrogen fueled booster even competing ?!Yes there have been serious proposals to use the RS-68.
... The [RS-68] engines are exist now,
... so the launch pad infrastructure is greatly simplified.
Quote from: notsorandom on 05/17/2013 01:01 pmQuote from: renclod on 05/17/2013 09:14 amIs a hydrogen fueled booster even competing ?!Yes there have been serious proposals to use the RS-68.Please specify what corporation has formally entered the SLS advanced booster competition with H2 fuel and a RS-68 engine.
During a presentation on April 4 of this year, Mr. Gerstenmaier showed a slide (below) that had a couple of things that I hadn't seen in previous presentations.What are the "Dual Use Upper stage" and "in-space long-term cryopropulsion element?" I'd guess that the "Upper stage" is what we've been calling CPS, or is that mistaken?
I'm not sure if a Block-2 SLS with Large Upper Stage, CPS, and MPCV will even fit through the VAB doors. Maybe they're planning a dual-launch profile for any missions that require a CPS.
What are the "Dual Use Upper stage" [?]
Advanced Booster as current plan, while assessing Dual Use Upper stage as an alternate next evolution step for affordable mission capture.
So, could that "while" indicate the possibility of remaining with five-segment SRB and making up for the Advanced Booster performance with the DUUS?
Quote from: ChileVerde on 05/17/2013 04:54 pmDuring a presentation on April 4 of this year, Mr. Gerstenmaier showed a slide (below) that had a couple of things that I hadn't seen in previous presentations.What are the "Dual Use Upper stage" and "in-space long-term cryopropulsion element?" I'd guess that the "Upper stage" is what we've been calling CPS, or is that mistaken?My guess is that the dual-use upper stage will be an 8.4m upper stage with four RL-10 engines, which can be used both during ascent to increase payload to LEO, and as an EDS for BLEO missions. Thus the DUUS (I prefer Medium Upper Stage or MUS) will enable BLEO missions prior to the development of the dedicated Large Upper Stage and the Cryogenic Propulsion Stage.The Large Upper Stage will be 8.4m diameter with one or two J2X engines, and will be used purely during ascent to maximize payload to LEO. And, since the LUS will use all of its prop during ascent, NASA will also need a dedicated in-space cryo stage for EDS purposes. I believe this stage has been called the CPS in other documentation, and is not the same as the LUS or the dual-use (medium) upper stage.I'm not sure if a Block-2 SLS with Large Upper Stage, CPS, and MPCV will even fit through the VAB doors. Maybe they're planning a dual-launch profile for any missions that require a CPS.Mark S.
It is on L2.
Good thinking IMO to simplify pad infrastructure, where SRBs are shining: no fueling required on pad also no de-fueling required after a countdown abort