Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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Preliminary Reeling AnalysisθθAssumptions¥tether = massless rod¥tether completely deployed¥gravitational forces normal to tether axis neglectedEarthLess ReboostOptimum Optimum Case,Case #1 Case #1 4/17/00End Swapping, Maximum Tensi on (N) 524, 627 319,697 325,814Despun Stati on, Maximum Tensi on (N) 7, 655 7,943 9,524Gravi ty Gradient Only, Max Tensi on (N) 2, 152 2,154 2,218For reel rate = 1 m /s, estimate electrical motoreffi ciency= 0.9estimate electrical power to mechanicalwork effi ciency= 0.4End Swapping Reeling Power ("in" ) Estimate (kW) 1, 457 888 905Despun Stati on Reeling Power ("in" ) Estimate (kW) 21 22 26Gravi ty Gradient Only, Reeling Power in (kW) 6 6 26 6
Reel Subsystem Concept27
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Tethers Unlimited, Inc.MMOSTT Final
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NIAC Funded Tether Research• Moon
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Electrodynamic Reboost• Power sup
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Cislunar Tether Transport System•
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MXER Tethers Included in NASA’sII
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5mt Payload Tether Boost Facilityfo
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LEOGTO Boost Facility• Initial Fa
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Tether Boost FacilityControl Statio
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LEOGTO Boost Facility• TetherSim
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Rendezvous• Rapid AR&C Capability
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Proposed RETRIEVE TetherExperiment
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µTORQUE on Delta IV• Delta-IV Se
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Opportunities for NASATechnology De
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AIAA 2000-3842COMMERCIAL DEVELOPMEN
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--Commercial Tether Transport AIAA
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-Commercial Tether Transport AIAA 2
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Commercial Tether Transport AIAA 20
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Page 58 and 59: Momentum Exchange/Electrodynamic Re
Page 60 and 61: DESIGN AND SIMULATION OF A TETHER B
Page 62 and 63: Tether Boost Facility Design AIAA 2
Page 70 and 71: Tethers Unlimited, Inc.Cislunar Tet
Page 82 and 83: Interim Report Outline- Configurati
Page 84 and 85: Mission Definition¥ Payload Capaci
Page 86 and 87: Baseline Control Station DetailsTET
Page 88 and 89: Baseline Grapple AssemblyCAPTURES A
Page 90 and 91: LEO Facility System ArchitectureGRA
Page 92 and 93: Payload Adapter Assembly Subsystems
Page 94 and 95: Potential Reeling FunctionsReeling
Page 96 and 97: LEO Control Station Weights16
Page 98 and 99: Payload Adapter Assembly Weights18
Page 100 and 101: Tether Boost FacilityRequired Power
Page 102 and 103: Electrical Propulsion Voltage´ Spe
Page 104 and 105: Potential Reeling FunctionsReeling
Page 108 and 109: Tether Boost FacilitySystem Require
Page 110 and 111: Table of Contents1 Scope ..........
Page 112 and 113: 2 ReferencesThis section lists docu
Page 114 and 115: The system shall measure and contro
Page 116 and 117: 4 Ground Rules & AssumptionsThis se
Page 118 and 119: Appendix F: Tether Boost Facility D
Page 120 and 121: Appendix F Tether Boost Facility De
Page 122 and 123: Appendix F Tether Boost Facility De
Page 142 and 143: Appendix L: Tether Boost Facility D
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Appendix L: Tether Boost Facility D
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Tethers Unlimited, Inc.Tether Rende
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Ongoing Tether Work Under NIAC Fund
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Cislunar Tether Transport System•
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Rapid Earth-Mars Transport• Reusa
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EarthMars Launch Windows• MMOSTT
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Incremental Development Path1. TORQ
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LEOGTO Boost Facility• TetherSim
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Tether Boost FacilityControl Statio
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Modular Design• Design Components
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Payload Accommodation AssemblyConfi
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Electrodynamic Thrusting• Drive c
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Tether Facility Reboost• Use Elec
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Rendezvous• Rapid Automated Rende
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Rendezvous Method: Preparation• P
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Development Issues• Automated Ren
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Potential Flight Experiments• Hig
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Opportunities for NASATechnology De
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Acknowledgements• Boeing/RSS - Jo
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IAF-99-A.5.10RAPID INTERPLANETARY T
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Rapid Interplanetary Tether Transpo
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IAF-00-S.6.04TETHER SYSTEMS FOR SAT
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IAF-00-S.6.04controlled very precis
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IAF-00-S.6.04Perigee Altitude (km)3
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IAF-00-S.6.04The LEO⇒GTO Tether B
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IAF-00-S.6.04AcknowledgmentsThis re
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Tethers Unlimited, Inc.Appendix K:
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Tethers Unlimited, Inc.at a rate of
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Tethers Unlimited, Inc.Appendix L -
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Tethers Unlimited, Inc.Appendixm M:
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Appendix N. MXER Tether for Deployi
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Electrodynamic Thrustingto Reboost
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100000 95000 90000 85000 80000 7500
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Momentum Exchange/Electrodynamic Re
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NOMENCLATURESymbol MeaningA payload
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DepartureangleA = 1.5π - (ω + u
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Tether material has a "characterist
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Rendezvous of Grapple with PayloadT
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adius vector to the new center of m
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days from payload pickup at one pla
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"JupiterandBeyond"Tether cut CUT:<
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Tethers Unlimited, Inc.Appendix Q:
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Tethers Unlimited, Inc.Appendix R:
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Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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