Advanced Concepts Group (ACG) Overview - SpaceWorks ...
Advanced Concepts Group (ACG) Overview - SpaceWorks ...
Advanced Concepts Group (ACG) Overview - SpaceWorks ...
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<strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong> (<strong>ACG</strong>) <strong>Overview</strong><br />
05 March 2009<br />
Dr. Brad St. Germain<br />
Director, <strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong> | <strong>SpaceWorks</strong> Engineering, Inc. (SEI) | brad.stgermain@sei.aero | 1+770.379.8010<br />
Mr. Jon Wallace<br />
Senior Project Engineer | <strong>SpaceWorks</strong> Engineering, Inc. (SEI) | jon.wallace@sei.aero | 1+770.379.8008<br />
Mr. Kevin Feld<br />
Project Engineer | <strong>SpaceWorks</strong> Engineering, Inc. (SEI) | kevin.feld@sei.aero | 1+770.379.8005<br />
Mr. William J.D. Escher<br />
Senior Technical Fellow | <strong>SpaceWorks</strong> Engineering, Inc. (SEI) | william.escher@sei.aero<br />
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<strong>SpaceWorks</strong> Engineering, Inc. (SEI) | www.sei.aero
SPACEWORKS ENGINEERING, INC. (SEI)<br />
Dr. John R. Olds, P.E.<br />
CEO<br />
SEI Affiliates<br />
Dr. Leroy Chiao<br />
Mr. Derek Webber<br />
Mr. Carl Ehrlich<br />
Mr. Rich Reinert<br />
Legal Counsel<br />
Mr. John Yates<br />
Morris, Manning & Martin, LLP<br />
Melinda S. Olds<br />
CFO<br />
• Accounts Receivable & Payable<br />
• External Accounting - Dave Pierce (FMS)<br />
• External Compliance - Scott Butler (Beason&Nalley)<br />
• External Benefits - Nancy Fogerty<br />
• External Payroll - Payroll1 Atlanta<br />
<strong>SpaceWorks</strong> Commercial<br />
Mr. A.C. Charania<br />
President<br />
<strong>SpaceWorks</strong> Engineering<br />
Dr. John E. Bradford<br />
President<br />
<strong>SpaceWorks</strong> Software<br />
Dr. John E. Bradford<br />
President<br />
• Amaresh Kollipara (Associate)<br />
• Sarah Lee (Manager of Software Sales)<br />
<strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong> (<strong>ACG</strong>)<br />
Dr. Brad St. Germain<br />
Director of <strong>Advanced</strong> <strong>Concepts</strong><br />
Engineering Economics <strong>Group</strong> (EEG)<br />
Mr. Dominic DePasquale<br />
Director of Engineering Economics<br />
Space Media <strong>Group</strong> (SMG)<br />
Mr. Mark Elwood<br />
Director of Space Media<br />
• Bill Escher (Sr. Technical Fellow)<br />
• Jon Wallace (Sr. Project Engineer)<br />
• Kevin Feld (Project Engineer)<br />
• Michael Kelly (Operations Engineer)<br />
• Jeff Whitfield (Systems Engineer, part-time)<br />
• Christopher Cho (Student Intern)<br />
• External Graphics and Illustration Specialists<br />
• External Website Developers<br />
Firm Organization Chart 05.12.2008<br />
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<strong>SpaceWorks</strong> Engineering, Inc. (SEI) | www.sei.aero
- The <strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong> (<strong>ACG</strong>) provides conceptual and<br />
preliminary analysis and technical assessment of advanced space<br />
systems.<br />
- The <strong>ACG</strong> specializes in delivering high value end-to-end analysis packages<br />
to our customers engaged in preliminary aerospace vehicle concept<br />
development, design space exploration, analysis of technical alternatives,<br />
independent concept review, or marketing of new technologies or initiatives.<br />
- Past experience includes conceptual and preliminary level modeling of a<br />
broad range of future space transportation and aerospace infrastructure<br />
concepts.<br />
- Technical assessments may include analysis of concept weights, ascent and<br />
entry trajectories, propulsion, Computer-Aided Design (CAD) drawings,<br />
aerodynamics, thermal protection requirements, abort assessments, and<br />
subsystem definition and sizing.<br />
- The <strong>ACG</strong> performs both traditional deterministic and probabilistic analyses<br />
to explicitly evaluate system risk through uncertainty in key design<br />
variables.<br />
A B O U T<br />
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REDTOP-Pro<br />
Rocket Engine Performance Analysis<br />
Sentry<br />
Thermal Protection System (TPS) Analysis<br />
NASCART-GT<br />
Cartesian-grid based flow solver<br />
SAMPLE <strong>ACG</strong> TOOLS AND MODELS:<br />
- POST/POST-II (Program to Optimize Simulated Trajectories)<br />
- Bullseye (Interplanetary trajectory analysis)<br />
- APAS (Aerodynamic Preliminary Analysis System)<br />
- NASCART-GT (Solution adaptive, Cartesian-grid based flow solver)<br />
- REDTOP-Lite/REDTOP-Pro (Rocket Engine Design Tool for Optimal Performance)<br />
- Sentry (Thermal protection system analysis)<br />
- AFWAT (Air Force Weight Analysis Tool)<br />
- PHX ModelCenter (Model integration framework)<br />
- Solid Edge (CAD modeling and integration)<br />
- OptWorks (Non-gradient based optimization)<br />
- ProbWorks (Probabilistic analysis)<br />
SELECT RECENT PROJECTS:<br />
-Ares V Uncertainty Analysis for NASA’s Project Constellation [2007-2008]<br />
Contract sponsored by NASA Marshall Space Flight Center (MSFC)<br />
-Modeling and Simulation Techniques for Exploration Systems [2007-2008]<br />
Contract sponsored by NASA Langley Research Center (LaRC)<br />
-AFRL FAST Vision Vehicle Studies [2008]<br />
Contract sponsored by Air Force Research Lab (AFRL)<br />
-Development and Implementation of the Hero Modeling Environment [2006-2008]<br />
Contract sponsored by Air Force Research Lab (AFRL)<br />
-Systems Engineering and Design for <strong>SpaceWorks</strong> Foresight Spacecraft [2007]<br />
Lunar and Planetary Society Apophis Mission Design Competition first place winner<br />
-Lunar Lander Concept Design and Trajectory Simulation [2005-2007]<br />
Various Government and Commercial Customers<br />
-Innovative Concept Development of Reusable Launch Vehicles Using Combined-Cycle<br />
Propulsion for Military Applications [2003-2006]<br />
Contract sponsored by Air Force Research Lab (AFRL)<br />
E X P E R I E N C E<br />
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Concept Definition<br />
Concept definition and refinement, supported by<br />
detailed discipline-specific engineering assessment.<br />
Studies are conducted in a collaborative design<br />
environment, with interrelated disciplines interacting<br />
in a fully coupled manner. Results include converged<br />
and optimized system designs including detailed<br />
performance assessments and subsystem sizing<br />
Example Study: Military Space Access Vehicle Design<br />
Architecture Design<br />
Systems integration, optimization, CONOPS<br />
definition, and trade studies supporting end-to-end<br />
mission analysis.<br />
The <strong>ACG</strong> applies systems engineering best practices<br />
to develop mission architectures and perform<br />
associated metrics assessments.<br />
Example Study: Lunar Exploration Architecture Study<br />
S E L E C T<br />
C A P A B I L I T I E S<br />
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Probabilistic Analysis<br />
Mitigating future impacts of design uncertainty<br />
through stochastic simulation methods.<br />
<strong>ACG</strong> personnel are experienced with probabilistic<br />
design and analysis techniques and the group’s<br />
software toolset has been assembled with this<br />
capability in mind. Analysis results can be presented<br />
with appropriate certainty levels based on input<br />
distribution data.<br />
Example Study: Ares V Performance Uncertainty Assessment<br />
Technology Prioritization<br />
Providing decision-makers with an understanding of<br />
the impacts of technology developments on future<br />
designs.<br />
The <strong>ACG</strong> offers the TechSim prioritization process to<br />
establish quantitative sensitivities of Figures of Merit<br />
(FOMs) with respect to changes in technology<br />
performance metrics. The TechSim process can be<br />
run deterministically or probabilistically depending on<br />
customer requirements.<br />
Example Study: Lunar Exploration Technologies<br />
S E L E C T<br />
C A P A B I L I T I E S<br />
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Interplanetary Missions<br />
Analysis and design for missions beyond the Earthmoon<br />
system.<br />
Equipped with internally-developed and industry<br />
tools, the <strong>ACG</strong> is able to examine and optimize<br />
departure and arrival conditions, design spacecraft<br />
subsystems, and assess other aspects for this type<br />
of mission. Specific experience to date includes<br />
missions to Mars, Jupiter, Pluto, and near-Earth<br />
objects (NEOs).<br />
Example Study: Radio Tagging Mission to NEO Apophis<br />
Tool Development<br />
Software to facilitate analysis of aerospace system<br />
and subsystem performance.<br />
Together with <strong>SpaceWorks</strong> Engineering’s Software<br />
Division, the <strong>ACG</strong> develops analysis software<br />
specialized to the needs of our clients. Multiple<br />
programming languages (Java, C++, Visual Basic,<br />
Fortran, etc.) are employed to develop a range of<br />
software from rocket engine design codes to<br />
interplanetary trajectory simulators.<br />
Example Study: REDTOP-Pro Rocket Engine Design Tool<br />
S E L E C T<br />
C A P A B I L I T I E S<br />
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Hero: A Collaborative Multidisciplinary and Multifidelity Design<br />
Framework for Launch Systems<br />
Hero is a collaborative, automated engineering environment for the analysis of vehicles and<br />
missiles with air-breathing and/or rocket propulsion systems and can be used to support a variety of<br />
missions from space-access to global reach/strike<br />
System interface and integration environment utilizes Phoenix Integration’s PHX ModelCenter© and<br />
Analysis Server products<br />
Provides easy setup and analysis in areas of propulsion, aerodynamics, aeroheating, trajectory<br />
simulation, and thermal protection system design using a variety of industry standard tools, SEI<br />
COTS tools, and Hero-specific modules<br />
Automates closure process and provides standardization for vehicle modeling. Capable of multifidelity<br />
analysis across a range of disciplines<br />
Example Study: Vision Vehicle Concept<br />
S E L E C T<br />
C A P A B I L I T I E S<br />
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- <strong>SpaceWorks</strong> Engineering’s <strong>ACG</strong> analysts have provided these services<br />
to federal government and aerospace prime contractor customers for a<br />
variety of space applications including NASA’s lunar exploration<br />
architecture, future expendable launch vehicles, new reusable launch<br />
systems, new launch facilities, in-space transportation elements, space<br />
infrastructure (habitats, propellant depots, rovers), and deep-space<br />
missions.<br />
- The <strong>ACG</strong> works closely with <strong>SpaceWorks</strong> Engineering’s Engineering<br />
Economics <strong>Group</strong> and may additionally assist the <strong>SpaceWorks</strong><br />
Commercial division with technical analysis for entrepreneurial<br />
commercial clients.<br />
C L I E N T S<br />
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<strong>SpaceWorks</strong> Engineering, Inc. (SEI) | www.sei.aero
DR. BRAD ST. GERMAIN<br />
Director of <strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong><br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI)<br />
brad.st.germain@sei.aero | 1+770.379.8010<br />
Dr. St. Germain has managed and supported a wide range of space systems and architecture design activities for SEI’s<br />
government and commercial clients. He has a strong background in aerospace systems design, with specific disciplinary<br />
expertise in space vehicle trajectory simulation, weight estimation and propulsion analysis.<br />
Recent work at SEI has focused on the design of various lunar exploration concepts for several customers. This work involved<br />
the end-to-end simulation of lunar exploration architectures including sizing Earth-to-Orbit vehicles, in-space stages, and the<br />
assessment of overall architecture costs and reliability. Other recent projects at SEI include evaluation of a small payload Earthto-Orbit<br />
launch vehicle and the development of both an in-space trajectory analysis tool and a parametric space vehicle weight<br />
estimation tool.<br />
While at the Space Systems Design Lab at the Georgia Institute of Technology, he developed an optimization technique for the<br />
performance and powerhead configuration of liquid rocket engines (Ph.D. Thesis), and led various conceptual level launch<br />
vehicle and space systems design projects. Dr. St. Germain also has work experience obtained through positions at Pratt &<br />
Whitney Space Propulsion, NASA Marshall Space Flight Center, and NASA Langley Research Center.<br />
Dr. St. Germain holds Doctoral and Masters Degrees in Aerospace Engineering from the Georgia Institute of Technology, along<br />
with a minor in Mathematics. He also holds a Bachelor of Science degree in Mechanical Engineering from Louisiana State<br />
University. Dr. St. Germain is a member of the American Institute of Aeronautics and Astronautics and the AIAA Space<br />
Transportation Technical Committee (STTC).<br />
S T A F F<br />
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<strong>SpaceWorks</strong> Engineering, Inc. (SEI) | www.sei.aero
MR. JON WALLACE<br />
Senior Project Engineer<br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI)<br />
jon.wallace@sei.aero | 1+770.379.8008<br />
MR. KEVIN FELD<br />
Project Engineer<br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI)<br />
kevin.feld@sei.aero | 1+770.379.8005<br />
Mr. Jon. G. Wallace is a Senior Project Engineer at <strong>SpaceWorks</strong><br />
Engineering, Inc. (SEI). Mr. Wallace has a background in conceptual design<br />
and analysis of advanced space systems, architectures, and missions.<br />
Other recent experience includes performing lunar lander system design<br />
trade studies in support of NASA and military spaceplane concept design<br />
studies for the U.S. Air Force.<br />
Mr. Wallace has recently been involved in several activities supporting<br />
NASA’s Project Constellation, including work with both government and<br />
commercial partners. These projects have comprised lunar exploration<br />
architecture studies, investigation of advanced chemical in-space propulsion<br />
concepts, and examination of present and future opportunities for economic<br />
development of space. He has also performed lunar descent trajectory<br />
analyses for NASA to support the design of attitude control systems for<br />
future crewed landers.<br />
His prior experience includes design, simulation, and CAD layout for several<br />
rocket and air-breathing Earth-to-orbit launch systems for the U.S. Air<br />
Force. As part of this project, Mr. Wallace led the multidisciplinary design<br />
process for SEI’s ARES Hybrid-OS two-stage launch system.<br />
Mr. Kevin Feld is a Project Engineer in the <strong>Advanced</strong> <strong>Concepts</strong> <strong>Group</strong> at<br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI). Mr. Feld is a recent addition to SEI’s<br />
staff and adds experience in interplanetary mission design and solid rocket<br />
motor development. His interplanetary mission design experience includes<br />
subsystem development and propulsion, trajectory, and communications<br />
trade studies. Through an internship with a solid rocket manufacturer, Mr.<br />
Feld applied his abilities in engineering analysis to develop software for the<br />
optimization of solid rocket motors and to create a user interface for rocket<br />
ballistics software.<br />
Mr. Feld is a member of the American Institute of Aeronautics and<br />
Astronautics (AIAA) and was a member of EnCouncil, the engineering<br />
school council at Washington University in St. Louis. He is an active<br />
supporter of community events, leading the construction of a student-built<br />
façade for a carnival benefiting the St. Louis community, as well as<br />
supporting fundraisers for the American Cancer Society, Children’s Miracle<br />
Network, and St. Louis Children’s Hospital.<br />
He received his Bachelor of Science degree in Aerospace Engineering with<br />
high honor from the Georgia Institute of Technology. Mr. Wallace is a<br />
member of the American Institute of Aeronautics and Astronautics (AIAA).<br />
S T A F F<br />
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MR. WILLIAM J.D. ESCHER<br />
Senior Technical Fellow<br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI)<br />
william.escher@sei.aero | 1+256.895.6674<br />
DR. LEROY CHIAO<br />
SEI Affiliate<br />
Mr. William J.D. Escher is Senior Technical Fellow at <strong>SpaceWorks</strong><br />
Engineering, Inc. (SEI). Mr. Escher has 50 years experience working in the<br />
aerospace industry divided among nearly equal tenures in the government,<br />
industry, and self-employed arenas. He has had a long-term involvement with<br />
space transportation and related propulsion developments that stretch back<br />
to the United State' first attempts to place scientific satellites in orbit during<br />
Project Vanguard run by the Naval Research Laboratory. Mr. Escher has also<br />
held positions at multiple NASA field centers as well as at NASA<br />
Headquarters, Rocketdyne, The Marquardt Corporation, Kaiser-Marquardt,<br />
and Astronautics Corporation of American. Additionally, Mr. Escher spent<br />
fifteen years as a self-employed consultant in the areas of terrestrial energy<br />
systems and environmental betterment technology.<br />
Just prior to joining SEI, Mr. Escher served as a senior systems engineer in<br />
the Applied Technologies <strong>Group</strong> of Science Applications International Corp.<br />
(SAIC) in Huntsville, Alabama. At SAIC, he applied his expertise in<br />
airbreathing/rocket-based combined-cycle propulsion to the development of<br />
propulsion technology databases and advanced space transportation system<br />
assessments.<br />
At Cornell University, while undertaking mechanical engineering studies, Mr.<br />
Escher served as the president and experimental committee chairman of the<br />
Cornell Rocket Society. He is an Associate Fellow of the American Institute of<br />
Aeronautics and Astronautics (AIAA), a long-term member of SAE<br />
International, and a founding participant in the Space Propulsion Synergy<br />
Team (SPST).<br />
S T A F F<br />
Dr. Chiao is an affiliate and technical advisor to <strong>SpaceWorks</strong> Engineering,<br />
Inc. (SEI). Astronaut Leroy Chiao (or Jiao Lizhong in Chinese pinyin), left<br />
NASA in 2005 following a successful fifteen-year career with the agency. A<br />
veteran of four space missions, Dr. Chiao most recently served as<br />
Commander of Expedition 10 aboard the International Space Station (ISS).<br />
He has logged over 229 days in space - over 36 hours of which were spent<br />
in Extra-Vehicular Activity (EVA, or spacewalks). A native English speaker,<br />
Dr. Chiao also speaks Russian and Mandarin Chinese. He has worked<br />
closely with Japanese, Russian, and European astronauts and their<br />
affiliated space agencies. He is a specialist in all facets of US and Russian<br />
EVA hardware and operations, and is EVA-certified in US and Russian<br />
spacesuits, tools, and training programs. A fully trained Space Shuttle<br />
Mission Specialist and Space Station Commander, Dr. Chiao is also a fullycertified<br />
copilot of the Russian Soyuz spacecraft. As an instrument-rated<br />
pilot, Dr. Chiao has logged over 2,600 flight hours in a variety of aircraft and<br />
spacecraft.<br />
A F F I L I A T E<br />
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MR. CARL F. EHRLICH<br />
SEI Affiliate<br />
MR. RICHARD P. REINERT<br />
SEI Affiliate<br />
Mr. Carl F. Ehrlich, Jr. is an affiliate and technical advisor to <strong>SpaceWorks</strong><br />
Engineering, Inc. (SEI). He has over 40 years of active experience in the<br />
aerospace industry, having retired from a successful 25 year career at Boeing<br />
North American (formerly: Rockwell International). Prior to that, he was<br />
employed at the Lockheed-California and Douglas Aircraft Companies for a<br />
total, of 15 years. He served with the United States Air Force in the Air<br />
Attaché Office of the American Embassy in Teheran, Iran.<br />
Mr. Richard P. Reinert is an affiliate and technical advisor to <strong>SpaceWorks</strong><br />
Engineering, Inc. (SEI) in the areas of mission and spacecraft design. Mr.<br />
Reinert is currently the Manager and Chief Engineer of R P Reinert &<br />
Associates consulting, LLC in Colorado. He retired from a successful 24<br />
year career at Ball Aerospace & Technologies Corp last year. Previous<br />
experience included six years each at Boeing and Hughes Aircraft and 4<br />
years at the Lockheed-California Company.<br />
During his active career, Mr. Ehrlich managed and participated in a wide<br />
range of advanced space transportation projects ranging from the 10-<br />
Passenger Orbital Carrier and Ten Ton Orbital Carrier studies in 1963-5 for<br />
NASA/MSFC, to the management of the Highly Reusable Space<br />
Transportation study for NASA/MSFC in 1997.<br />
Since his retirement in 1998, Mr. Ehrlich has consulted with a number of<br />
aerospace companies focused on the development of operational concepts<br />
for advanced reusable launch and entry vehicle systems.<br />
He is an Associate Fellow with the American Institute of Aeronautics and<br />
Astronautics (AIAA) and is currently a member and treasurer of the AIAA<br />
Space Transportation Technical Committee, a member of the AIAA Space<br />
Logistics Technical Committee, and Vice Chair for Membership and<br />
Treasurer for the AIAA San Fernando Pacific Section Executive Council.<br />
Mr. Ehrlich has earned degrees from Stanford University in 1957 (Bachelor of<br />
Science in Aerodynamics) and the University of Southern California in 1967<br />
(Master of Science in Aerospace Engineering).<br />
A F F I L I A T E S<br />
While serving at these four companies, Mr. Reinert has supported<br />
aerospace projects ranging from civil aircraft to planetary spacecraft in key<br />
design lead positions. At Boeing Aerospace he was manager of a<br />
DOE/NASA study that defined a practical approach to space disposal of<br />
nuclear waste, and supported concept definition of solar power satellites<br />
and advanced space transportation systems. At Ball he led successful<br />
proposal efforts for the SDIO Relay Mirror Experiment (RME), the Canadian<br />
Space Agency RADARSAT spacecraft, and the NASA Deep Impact<br />
Discovery Mission. His most recent assignments at Ball involved leading<br />
mission and system design of spacecraft concepts aimed at characterization<br />
and mitigation of hazards due to Near Earth Objects and in studies and<br />
hardware development involving attitude control of solar sails.<br />
Mr. Reinert earned a Bachelor of Science in Aeronautics and Astronautics<br />
from the Massachusetts Institute of Technology in 1968 and attended the<br />
Graduate School of Mechanical Engineering at Loyola Marymount<br />
University in Los Angeles in the seventies.<br />
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SELECTED PAPERS:<br />
- Bradford, J. E., Olds, J. R., Wallace, J. G., "Concept Assessment of a Hydrocarbon Fueled RBCC-Powered Military Spaceplane," 54th Joint Army-Navy-<br />
NASA-Air Force (JANNAF) Propulsion Meeting (JPM) and 5th Modeling and Simulation / 3rd Liquid Propulsion / 2nd Spacecraft Propulsion Joint<br />
Subcommittee Meeting, Denver, Colorado, May 14-18, 2007.<br />
- Bradford, J. E., Olds, J. R., Wallace, J. G., "A Two-Stage Spacelift Concept Using Air-Breathing Propulsion and Falcon-Derived Hardware," 54th Joint<br />
Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting (JPM) and 5th Modeling and Simulation / 3rd Liquid Propulsion / 2nd Spacecraft Propulsion Joint<br />
Subcommittee Meeting, Denver, Colorado, May 14-18, 2007.<br />
- Bradford, J. E., Olds, J. R., "Thermal Protection System Sizing and Selection for RLVs Using the Sentry Code," AIAA-2006-4605, 42nd<br />
AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Sacramento, California, July 9-12, 2006.<br />
- Charania, A., St. Germain, B., Wallace, J. G., Olds, J. R., "REACTIONN: A Nuclear Electric Propulsion Mission Concept to the Outer Solar System,"<br />
AIAA-2004-3982, 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Fort Lauderdale, Florida, July 11-14, 2004.<br />
- Escher, W. J. D., "The Hypersonic ETO Space Transporter as an Enabling Element for Acquiring Commercial Human-rated Space Transportation<br />
Capabilities," AIAA-2006-8056, 14th AIAA/AHI Space Planes and Hypersonic Systems and Technologies Conference, Canberra, Australia, November 6-9,<br />
2006.<br />
- St. Germain, B., Charania, A., Olds, J. R., "A Stochastic Process for Prioritizing Lunar Exploration Technologies," AIAA-2005-6607, Space 2005, Long<br />
Beach, California, August 30 - September 1, 2005.<br />
- St. Germain, B., Olds, J. R., Bradford, J. E., Charania, A., DePasquale, D., Schaffer, M., and Wallace, J. G., "Utilizing Lunar Architecture Transportation<br />
Elements for Mars Exploration," AIAA-2007-6136, Space 2007, Long Beach, California, September 18 - 20, 2007.<br />
- Wallace, J. G., Bradford, J. E., Charania, A., Escher, W. J. D., Eklund, D., "Concept Study of an ARES Hybrid-OS Launch System," AIAA-2006-8057, 14th<br />
AIAA/AHI Space Planes and Hypersonic Systems and Technologies Conference, Canberra, Australia, November 6-9, 2006.<br />
- Wallace, J. G., St. Germain, B., Charania, A., "Probabilistic Examination of Lunar Landers," AIAA-2005-6734, Space 2005, Long Beach, California, August<br />
30 - September 1, 2005.<br />
B I B L I O G R A P H Y<br />
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Business Address:<br />
<strong>SpaceWorks</strong> Engineering, Inc. (SEI)<br />
1200 Ashwood Parkway<br />
Suite 506<br />
Atlanta, GA 30338 U.S.A.<br />
Phone: 1+770.379.8000<br />
Fax: 1+770.379.8001<br />
Internet:<br />
WWW: www.sei.aero<br />
E-mail: info@sei.aero<br />
w w w . s e i . a e r o<br />
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