2-27 Transportation and Assembly System Fleet and Support Equipment Characteristics and Cost Summary................................... 2-30 2-28 Traffic and Fleet Size Summary .............................................................. 2-32 2-29 Assembly Cost Comparison ....................................................................... 2-32 2-30 Antenna Structural Cost Comparison ..................................................... 2-34 2-31 Recommendations for Task 3 Study ......................................................... 2-34 3.1-1 SSPS Baseline Configuration....................................................................... 3.1-2 3.1-2 SSPS Mass Properties................................................................................... 3.1-3 3.1-3 Mission Options ............................................................................................... 3.1-4 3.1-4 Shuttle Payload Capability - Due East Launch from KSC................... 3.1-6 3.1-5 Shuttle Payload Capability - Due East Launch from KSC................... 3.1-6 3.1-6 Cryogenic Tug Deploy Performance......................................................... 3.1-7 3.1-7 Cryogenic Tug Configuration........................................................................ 3.1-7 3.1-8 Ion Propulsion Altitude vs Time From (100 n mi circular) - No Plane Change..................................................................... 3.1-9 3.1- 9 SSPS Orbit Decay............................................................................................... 3.1-11 3.1- 10 SSPS Orbit Decay Characteristics ............................................................ 3.1-12 3.1- 11 SSPS Orbit Decay Characteristics ............................................................ 3.1-12 3.1- 12 Force Required to Compensate for Air Drag . .. .................................. 3.1-13 3.1- 13 Ion Propulsion System Sizing Factors...................................................... 3.1-15 3.1- 14 Optimum Specific Impulse.............................................................................. 3.1-17 3.1- 15 Maximized Payload Ratio.............................................................................. 3.1-17 3.2-1 MPTS Antenna Structural Arrangement.................................................... 3.2-3 3.2-2 MPTS Antenna Structural Arrangement....................................................... 3.2-4 3.2-3 Gear System........................................................................................................ 3.2-5 3.2-4 Typical Motor Options.................................................................................... 3.2-7 3.2-5 Rotary Drive Concept....................................................................................... 3.2-8 3.2-6 Antenna Rotary Joint....................................................................................... 3.2-9 3.2- 7 Power Transfer Device Selection Considerations ................................ 3.2-11 3.2- 8 Brush/Slip Ring Concept .............................................................................. 3.2-11 3.2- 9 Operating Temperatures (°C) of Candidate Brushes............................. 3.2-12 3.2- 10 Voltage Drop for Candidate Brushes (For Single Contacts).............. 3.2-12 3.2- 11 Friction and Wear Properties of Oils (Four-Ball Test)....................... 3.2-14
RkJQdWJsaXNoZXIy MTU5NjU0Mg==