Shuttle-Derived Launch Vehicles’ Capabilities: An Overview William J. Rothschild and Debra A. Bailey (Boeing, NASA Systems), Edward All. Henderson (NASNJSC), and Chris Crumbly (NASNMSFC) For Presentation at the AIM 15‘ Exploration Conference Orlando, Florida, January 30-February 1,2005 EXPORT CONTROL NOTICE. This document, including any attachments and exhibits hereto, does not contain technical data controlled by the International Traffic in Arms Regulations (ITAR; 22 CFR 120-130) andor the Export Administration Regulations (EAR, 15 CFR Part 730-744). It may be exported, released, or disclosed to foreign nationals inside or outside the United States without finther USG export license approval. Include this notice with any reproduced part of this document. 8 f Shuttle-Derived Launch Vehicles' Capabilities: An Overview William J. Rothschild*and Debra A. Bailey' The Boeing Company, NASA Systems, Houston, TX 77059 Edward M. Henderson: NASA/Johnson Space Center 2, Houston, TX 77058 and Chris Crumbly4 NASA/Marshall Space Flight Center, Huntsville, AL 35812 Shuttle-Derived Launch Vehicle (SDLV) concepts have been developed by a collaborative team comprising the Johnson Space Center, Marshall Space Flight Center, Kennedy Space Center, ATK-Thiokol, Lockheed Martin Space Systems Company, The Boeing Company, and United Space Alliance. The purpose of this study was to provide timely information on a full spectrum of low-risk, cost-effective options for STSDerived Launch Vehicle concepts to support the definition of crew and cargo launch requirements for the Space Exploration Vision. Since the SDLV options use high-reliability hardware, existing facilities, and proven processes, they can provide relatively low-risk capabilities to launch extremely large payloads to low Earth orbit. This capability to reliably lift very large, high4ollar-value payloads could reduce mission operational risks by minimizing the number of complex on- orbit operations compared to architectures based on multiple smaller launchers. The SDLV options also offer several logical spiral development paths for larger exploration payloads. All of these development paths make practical and cost-effective use of existing Space Shuttle Program (SSP) hardware, infrastructure, and launch and flight operations systems. By utilizing these existing assets, the SDLV project could support the safe and orderly transition of the current SSP through the planned end of life in 2010. The SDLV concept definition work during 2004 focused on three main configuration alternatives: a side-mount heavy lifter (-77 MT payload), an in-line medium lifter (-22 MT Crew Exploration Vehicle payload), and an in-line heavy lifter (>lo0 MT payload). This paper provides an overview of the configuration, performance capabilities, reliability estimates, concept of operations, and development plans for each of the various SDLV aiternatives. While development, production, and operations costs have been estimated for each of the SDLV configuration alternatives, these proprietary data have not been included in this paper. ~____~~ ~ Director. Space Transportation, Boeing NASA Systems, 13100 Space Ctr. Blvd. (MC HS 20), Houston, TX (AMMember) Project Engineer, Space Shuttle UD,Boeing NASA Systems, 13100 Space Ctr. Blvd. (MC HSl-30), Houston, TX (AMA Member) ' Deputy Manager, Strategic Planning Office, Space Shuttle Program, NASA/Johnson Space Center (AMMember) ' Manager. Cargo Launch Vehicle Study, Space Transportation Programs and Projects Office, NASAIMSFC-NPOI (AMA Member) 1 American Institute of Aeronautics and Astronautics I. Introduction Space Transportation System (STS) assets have been in operation since 1981. They are well understood from technical performance, reliability, operations, and cost aspects. Adapting these proven STS assets to yield new launch systems would take full advantage of demonstrated mature, reliable, human-rated systems to develop impressive performance capabilities with minimum technical, schedule, cost, and programmatic uncertainties. Independent studies done by several industry and NASA teams have shown that such STS-Derived Launch Vehicle (SDLV) ccncepts cffer pa;.!ozd perfomaxe OY~Ta =&e mige fiorn 16 io 101 inetilc ions (Icrr) to low Earth orbit (LEO). Because of the high technical readiness level (TRL) associated with these STS assets, rapid demonstrations and flight test opportunities could provide early program successes with low schedule and cost risks. Importantly, SDLV development and test activities would enhance the safe “flyout” of the cwent STS program through continuity of critical skills and manufacturing infrastructure during the transition period. Viable technical and management approaches have been ide~tifier!thzt mdd &~~~&i!!yredwe the ~~LKZ!rec.;7;,ng casts ccmpaid ta the current STS system. These operational cost savings are achievable by eliminating the labor- and facility- intensive Shuttle orbiter processes plus the low marginal cost associated with using ongoing STS assets. II. Objective The objective of this collaborative industryNASA study has been to define a broad range of SDLV alternatives that could support NASA’s space exploration launch infrastructure needs. We have attempted to assess NASA’s current STS assets and evaluate their applicability to future exploration systems’ Earth-to-Orbit (ETO) launch needs. Our goal has been to provide timely, useful information on a full range of options, supported by objective facts and data. It was not the intent of these collaborative SDLV studies to recommend an ET0 architecture approach or any specific 1auncher confi gurati ons. III. Options for ET0 Transportation Using STSDerived Launch Vehicles SDLV offers a variety of configuration approaches to satisfy the crew and the heavy-lift cargo requirements of future human space exploration. The current STS can reliably propel 118 MT to LEO, including the mass of the Space Shuttle orbiter. By conceptually mixing and matching the basic human-rated propulsion system elements of the STSSpace Shuttle Main Engine (SSME), solid rocket boosters (SRBs), and external tank (ET-ne can create a wide range of new launch vehicle concepts, providing payload lift capabilities in the 16 to >IO0 MT range (Fig. 1). The SDLV work reported in this paper has focused on three main configuration alternatives: a side-mount heaty lifter (-77 MT payload), an in-line medium lifte (-22 MT Crew Exploration Vehicle [CEV] payload), and an in-line hea\y lifter (>I 00 MT payload). 4. Side-Mount HeaFy Lifter (43 to 92 &ITpayloads to LEO) This configuration is a straight-forward derivative of the current STS configuration, replacing the reusable Shuttle orbiter with an expendable payload carrier. The side-mount heavy lifter SDLV concepts would benefit from the long heritage and extensive learning provided by more than 110 STS launches. The side-mount heavy lifter configuration also enjoys an impressive library of previous design and planning work completed as part of the Shuttle-C project during the 1986-1992 timeframe, making this the most well-understood heavy-lift launch system concept available today. The side-mount heavy lifter concepts require the design and development of a new cylindrical payload carrier that would mount three SSMEs along with the avionics and other subsystems. The standard four-segment SRB configuration would use the current ET propellant volume to yield 77 MT payloads to LEO (Fig. 2). The five-segment SRB configuration could be used with a stretched ET to yield 92 MT payloads to LEO. Both side-mount heavy lifter SDLV configurations could carry either cargo only or a combination of cargo and a CEV (Fig. 3). Preliminary reliability estimates indicate the loss-of-vehicle (LOV) rate would be approximately 1/160 to 11240, depending on configuration and operational details. In addition to heavy payload mass, these SDLV options offer large payload sizes up to 7.5 meters in diameter and 35 meters long. Taking advantage of the existing or modified STS hardware for the side-mount launcher also allows the use of the current STS infrastructure. Expensive and time-consuming development of rocket engines and boosters would be avoided, enabling the side- mount heavy lifter Design, Development, Test, and Evaluation (DDT&E) program to achieve a first flight test in as little as 48 months from the start of Full-Scale Development (FSD), see Fig. 4. This would enable parallel operations of a side-mount healy lifter SDLV for a wide range of exploration cargo missions along with a CEV launcher for lunar missions using the same basic launcher and infrastructure. When operated with a CEV, the side-mount heavy 2 American Institute of Aeronautics and Astronautics I ~~~ Case I LV ~ypeI STS Medium 1 I* 1 Min Changea Magnum SaturnV 1xRSRM 1 - ~. I- - .- Engine No. x Type 1 3 x SSME I 3xSSME -J -. 4xESSME 5xF-1 -- J-2s I . I -I I RCS Only 1 J-2s I J -2 Net Payload Capability to 220 nrni Circular at 28.5 be9 Configuration/ Relative Sue I HEUR12OC Figure 1. STS-Derived Launch Vehicle (SDLV) options provide a flexible range of payload capabilities to low Earth orbit. PL Provides Orbit Circularizatton (wpop=6,306) at Apogee to 220 x 220 nmi -*/ t-- --z c- PL Fairing ET Separation Separation T = 500 s T-1 --53os , * MECO Ocean Disposal 220 x 30 nmi Propulsion Module Suborbital Separation T=487s T = T MEC0+45 min Alt nmi 0 .* ' = 57 . ' SRB Separation AttiiudeControl I Tz124.44~ Attitude Control Provided by Canier- Provided by Payload Alt = 147k ft Vel = 4.71 1 ft/s Q = 43 lbm2 Ocean Recovery : Launch orbit 220 x 220 nmi Payload Volume 6.5 m x 25 rn Pay'md Weight to Orbii 77 WIT (220nrni circular at 28.5 deg) (170.000 fbm) Reliability (LOV) 1Q37 Dimensions (ft) i Figure 2. The side-mount heavylift SDLV option offers a high-reliability launcher with large payloads for a low loss of mission risk. 3 American Institute of Aeronautics and Astronautics i *- \ I I .I Wl It I I1 I n1 I1 E,, I - 5-Segment Solid Booster Stretched ET 3 SSME Engines - Maximum Payload Capability (no engine-out) = 88 to 92 MT Usable Payload Capability With Engine-Out.