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IRNCLAM – InteRNational CisLunar Ascension Module Brian Anderson ASTE527 2010/11/23
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Background Requirement: commercial development of ISS Solution: send tourists to Moon on Earth-Moon transport ISS to exist for ~10 more years use existing tech for cislunar transport
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Concept Launch tourists & astronauts to ISS Depart ISS in Cislunar Transfer Vehicle Insert into Lunar orbit, stay few days Return to ISS Return to Earth
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Vehicle Design Cislunar Transfer Vehicle 4x Centaur TLI stages Sundancer “habitation module” Radiation hardened for SPEs
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Habitation Module – Bigelow Sundancer Pros Much MORE VOLUME for SIMILAR MASS as other space vehicles Designed with comfort in mind Existing ballistic protection + radiation shielding ECLSS as well as hygiene facilities Good exterior viewing possibilities Cons: Large surface area more mass for addt’l radiation hardening
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Additional Radiation Hardening 5 g/cm^2 to protect against worst case SPE Al, LiOH, Polyethylene or H 2 0 (last two best) Sundancer Area~=2.35x10^6 cm^2 Rad shield mass~=11700kg Assuming Sundancer already has shielding equivalent to 2 g/cm^2 Rad shield mass~=7000kg
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TLI – Centaur Upper Stage Pros Repeatedly flight tested design High Isp Cons Propellant mass could be higher for such a mission
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Stack Design Requried V = 2x(3700 m/s)=7400 m/s Requires 4xCentaur stages!! Payload Mass = 15’600 kg Sundancer + Rad shield Total Propellant Mass = 83’320 kg Total Mass = 107.9 Metric Tons Achieved V=7429 m/s
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IRNCLAM Centaur Sundancer
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Merits & Limitations Merits Uses existing designs Designed with passenger experience in mind Designed for space-only use, no mass for heat shield Limitations LARGE TLI stack due to Earth Orbit Injection and ISS docking ~14 days with no gravity
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Future Studies Use water supply for radiation shielding? Direct Earth Reentry to reduce stack size? J2-X better option for TLI?
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References Wertz, James R. Space Mission Analysis and Design. Dordrecht [u.a.: Kluwer Academic Publ., 2008. Print. Bigelow Aerospace http://www.bigelowaerospace.com/sundanc er.php http://www.bigelowaerospace.com/sundanc er.php Bernabeu, J., and I. Casanova. "Geant4- based Radiation Hazard Assessment for Human Exploration Missions." Advances in Space Research 40.9 (2007): 1368-380. Print.
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