A Space Elevator for the Moon Bradley C. Edwards, Ph.D. Black Line Ascension
Collaborators This work is based on a NASA proposal developed in collaboration with: Dr. Hyam Benaroya, Rutgers University Dr. Michael Duke, Colorado School of Mines Dr. Hermann Koelle, Berlin Technical University Ms. Patricia Russell, NIAC Dr. Bryan Laubscher, LANL Ms. Pamela Luskin, Futron Corporation Dr. David Raitt, ESA - ESTEC Mr. Ben Shelef, Spaceward Foundation Dr. Paul Spudis, JHU - APL
Basic Premise of Work (1) We want to go to the moon in a real way
Basic Premise of Work (1) We want to go to the moon in a real way …but does the public support lunar exploration (Wired)
Basic Premise of Work (2) Launch is the single largest cost and complexity driver $540M to $1B per launch Congressional estimate of NASA program: $125B over 15 years ~2000 tons to moon at $12k/lb
Rocket Transportation Launch costs are expected to decrease <15% Will improved operations and technology reduce costs further?
Current Moon Initiative (1) Limited lunar presence Not self-sustaining Public, private, political support?
Current Moon Initiative (2) Federally funded program Relevant timelines: 4 pres. admins., 16 fed. budgets No “business plan” with interesting ROI
A New Approach
The Major Difference Utilize space elevator transport Dramatic reduction in launch costs, complexity and risk Immature but quickly developing technology Enables large-scale self-sustained effort
The Space Elevator
2006 SE Games
Rocket / SE Comparison
Direct Impact Reduce program launch cost by ~$60B Increase tons on moon from ~2000 to 18,000 Reduces complexity Reduces overall program risk
Rest of Program: Baseline Mature landers based on Apollo Overbuilt components Redundant fuel depots in each orbit Redundant modules in each orbit Redundant resources
Rest of Program: Options Large volume units Excess capabilities enables use of new technology Resale of excess launch capacity or lunar facilities Same system for Mars
Complete System (1)
Complete System (2) Flexible system Resources everywhere
Summary of Concept Mature systems / space elevator base lunar program. • Lunar Base: Mature technology, extensive, redundant • Space Elevators (2) 3000 tons/yr @ $1B/yr operating cost High reliability, safe, large envelop Definable, up-front development risk • Overall Program Extensive lunar program: 69 ave. occupants $68B (2005 - 2023) total Safety : SE is safe and inexpensive allowing for redundant and overbuilt systems - Sustainability:Good business case - Expandable - Limited development risk / low overall risk
Future Directions SE-based lunar concept proposed to NASA NASA not interested Alternative options Private Establishing the components, finance and structure Non-U.S. Japan: presentation to the PM staff, general Australia: multiple activities Europe: EuroSpaceward, German SE games
Conclusion A high return approach for a lunar base has been proposed. The concept is not of interest to NASA Alternative options for development exist