1. Mai Lee Chang Miguel Gallego Travis Marks Pete Penegor Miao Zhang EMA 569 Dr. Elder Prof. Hershkowitz
2. Design Intent To design an unmanned cargo transportation system to deliver materials from Low Earth Orbit to the lunar surface in support of a lunar base. Deliver at least 5 metric tons (mT) of cargo in 6 months or less. Product Design Specification
6. Launch Vehicle SpaceX Falcon 9 Heavy 26.3 mT of cargo to LEO Launches to inclination of 28.5 degrees Total cost of $94.5 million
7. Launch Vehicle Fairing First launch: The engine and lander must fit inside of the fairing. Subsequent launches: Cargo capsule must fit inside of the fairing.
11. Ion Propulsion Engine VASIMRVX-250(Variable Specific Impulse Magnetoplasma Rocket) Power = 250 kW Trip to LLO Isp= 3,500 s T = 12 N Trip back to LEO Isp= 3,000 s T = 14 N
12. Engine Structure The engine is supported by an aluminum structure 7075-T6 Members SAE AMS 4049K SAE AMS 4154N 2117-T4 Rivets MS20470 AD 3-9 3 m 1.8 m
15. Fuel System and Avionics 2 plates supporting 4 Argon fuel tanks each Composite Overwrap Pressure Vessels Each tank holds 655 kg 1 plate supporting avionics and RCS fuel tanks LOX, Methane tanks Helium tank AutoGNC
17. Exterior of Fuel/Avionics Structure Stowed Solar Panels Whipple Shields Backside Active Docking System 6 m 4 m
18. Deployed Solar Arrays Deployed solar panels SLASR Arrays Two wings 18.4 m x 10.4 m each 30 mm of glass radiation protection PBOL = 298.5 kW PEOL = 268.7 kW Total weight = 500 kg
27. Releasable cargo pallet 5X International Standard Payload Rack 5X Active Flight Releasable Attachment System
28. Integrated cargo module 2 Aluminum Plated Whipple Shield Al 2219-T851 (3 mm Thick) Al 5083 (1.2 mm Thick) Multi-Layer Insulation Intermediate Stuffing Layer 2 layers Ceramic Fabric (Nextel 312-AF-10) 3 Layers Kevlar (KM2 SEAL 364)
29. Cargo capsule: avionics & propulsion module Active Docking System Avionics 5.4m Liquid Methane Tanks 4.0m
30. Cargo Capsule: Propulsion Refuel VASIMR and Lunar Lander In-situ resource utilization (ISRU) Oxygen: refuel two ascent vehicles per year Methane: 2,160kg per year Propellant Tanks:
37. 302 SS pipes per SAE J615Diameter=3.18m Methane tanks mounted with Al skirt on plate
38. Cargo Capsule: Avionics Guidance, Navigation, and Control GPS: General Dynamics Inertial Measurement Unit: Honeywell Star Tracker: Micro ASC Orstead DTU Communication S-Band UHF Band Computers Fault Tolerant Computer (FTC) FTC Electronic Boxes Monitoring and Safing Unit Power: Solar, lithium batteries Diameter=2.35m Diameter=1.25m
39. Cargo capsule: Active docking system Fluidic connector Retractable Probe Electrical connector Diameter=0.5m
40. Cargo Capsule Landing gear Based on Apollo Lunar Module Launch: stowed LEO: deployed Requirements: Structural Mechanical Landing performance Three main components: Primary Strut: Al 7075 per ASTM B221 Secondary Strut Al 7075 per ASTM B221 Footpad Aluminum Foam 2.07m 1.00m Dia=0.80m Deployed Position
44. Center Structure End plates 20mm Thick Aluminum 7075-T6as per AMS 4049K Vertical supports Aluminum 7075-T6 Fasteners 18/8 Stainless Steel Bolts as per ASTM F593
45. Center Structure Fuel Tanks 10mm Thick Al-Li 2090, Graphite Epoxy Various diameters Oxygen Tanks: 530mm, 480mm Methane Tanks: 260mm, 280mm, 320mm Notches for support 10mm spacing Fuel Tank Spacers/Holders 10mm Thick Aluminum 7075-T6
46. Skin Skin pieces 10 mm Aluminum 7075-T6as per AMS 4049K Fasteners 2117-T4 Aluminum Rivetsas per MS20470 Attached to vertical supports
47. Truss Structure Truss Aluminum 7075-T6 Swing out 90 deg Stowed area 0.3m x 0.6m x 1.0m
48. Truss Deployment Torsional spring SpaceDev’sSH-18010 Hinge Actuators SpaceDev’s EH-3525304 Stainless Steel Swing Arms Aluminum 7075-T6 Resting plate Aluminum 7075-T6 Hinges Sealed Deep Groove
49. Propulsion System Two CECE Engines Thrust: 80360 N Weight: 77 kg RCS Thrusters 20 XCOR CH4/LOX Double up in middle
50. Power/Avionics Power Solar Panel Stretched Lens Array Regenerative Fuel Cell Lithion Model L1147 Avionics Similar to VASIMR/Cargo Capsule ALHAT System Flash Lidar Altitude Velocity Terrain Relative Navigation Hazard Detection and Avoidance