Design of a Piloted Spacecraft to Bridge the

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Design of a Piloted Spacecraft to Bridge the Gap between the Space Shuttle and Crew Exploration Vehicle Michael Seibert University of Colorado at Boulder 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce”

Presentation Overview • • • Motivation Vehicle Requirements Conceptual Design Compatible Launch Vehicles Conclusions 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 2

Motivation • Hiatus in piloted spaceflight capability – 2010 -2014 • Four Options – Extend STS operations past 2010 – Contract with foreign governments – Accelerate CEV development – Develop a new vehicle 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 3

Vehicle Requirement Areas • • Crew Size Launch Vehicle Compatibility Launch Abort Orbital Maneuvering Rendezvous and Docking On Orbit Life Recovery Reusability 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 4

Vehicle Requirement Summary • Crew Size • Launch Abort – 5 person crew • Launch Vehicle Compatibility – Any 2005 existing or final design phase LV 5 April 2005 – Capability must be provided • Orbital Maneuvering – 300 -400 m/s ΔV – Rotation and translation 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 5

Vehicle Requirements Summary • Rendezvous and Docking – 2 days maximum – Automated – Dock with US segment • On Orbit Lifetime – 100 day minimum • Recovery Continued – Controllable Descent – Landing • Nondestructive • Conventional Runway • Reusability – Returned components only • Recovery – Reentry • 75 nm cross range • 500 nm down range 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 6

Conceptual Design • Winged Vehicle – Pros • Highly maneuverable • Runway landing – Cons • High temperature reentry 5 April 2005 • Capsule • Lower temperature reentry • Simpler design – Cons • Low maneuverability • Requires parachute for landing 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 7

Conceptual Design • ECLSS • Crew Size – Two row arrangement 5 April 2005 – Li. OH scrubbers – Separate ascent and descent air supplies 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 8

Conceptual Design • Rendezvous – Automated approach – Deployable radar system • Docking – APAS-89 docking adapter 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” [1] 9

Conceptual Design • Recovery – Lift vector generation • Offset center of mass and shaped heat shield – Parafoil descent • 1 NM-2 NM maneuvering range – Landing • Tricycle landing gear • Controlled rollout – Differential braking 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 10

Conceptual Design • Reaction Control System – Roll/translation thruster pairs – Translation only pairs • Orbital Maneuvering System – Single engine on roll axis 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 11

Conceptual Design • Miscellaneous – S/C Cooling • Heat exchangers (water/ammonia) – Crew ingress/egress • Hatch on port side next to rear seats – Windows • Four – 2 30 cm diameter next to rear seat rows – 2 next to front seats 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 12

Conceptual Design 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 13

Compatible Launch Vehicles • Estimated Spacecraft Mass – 11, 000 kg* • Delta IV Family – Medium+ (4, 2) • $138 M – Medium+ (5, 4) • $160 M • Atlas V Family – 400 series • $138 M *Based upon historical spacecraft densities, see accompanying paper 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 14

Conclusions • It is possible to develop a new vehicle before 2010 • The vehicle described will provide unprecedented launch flexibility • The vehicle describe can be used to complement the resumption of exploration beyond LEO 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 15

Questions? 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce”

References Background Image: NASA http: //solarsystem. nasa. gov/multimedia/gallery/ Columbia_Moon. jpg [1] Portree, D. Mir Hardware Heritage. NASA RP 1357. NASA, Houston. March 1995 5 April 2005 CSGC Undergraduate Research Symposium “Tomorrow’s Workforce” 17

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