Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

Appendix L: Tether Boost Facility Design Final ReportComputer System ArchitectureControl StationComputerGrappleAssemblyComputerGroundComputerPAAComputerFigure 3-3. Control Station Computer System Architecture3.2.4 Recommended Follow-on studiesNo follow-on studies are presently recommended as the technology required isan upgraded version of existing technology and should be available prior to theMMOSTT implementation date.3.3 Tether Deployment/Control3.3.1 Design Requirements, Drivers, and Assumptions• Design Driver 1: Tether length and diameter (100 km long, think diametertapers from 5.6mm to 4 mm)• Design Driver 2: Launch vehicle Dynamic Payload Envelope (assumedDelta IV-H, 5 m fairing)This phase concentrated on tether reel sizing. Assumption:• Current tether reel has a drum of diameter = 1m, and width = 1.5m.• The diameter of the drum plus wound tether = 68.3 inches3.3.2 New Issues and Requirements Identified• Method of electrically grounding the reel assembly and rest of ControlStation while high power is being applied to the electrodynamic tetherduring orbit raising.3.3.3 Trades and Recommendations• Trades w/ Reel sizing program• Show some test run results and convergence to 1 meter diameter• Recommendation: reel drum diameter of 1 meter with the motor housedwithin the ID of the reel drum.L-59