AAE450 Senior Spacecraft Design Chris Bush Week 5: February 15 th, 2007 D&C Group High Thrust Trajectories ET, dE, aM

AAE450 Senior Spacecraft Design Earth Taxi Impulsive, non-Hohmann transfer Utilizes 2 tangential burns Total Delta V:3.1 km/s Delta V at incidence with HEO:50 m/s Free return time of flight:2 days Earth Departure Delta V = 2.5 km/s Same as last week Comparable Delta V for Earth Capture

AAE450 Senior Spacecraft Design Mars Arrival Impulsive capture at 300 km pass distance Delta V = 1.5km/s Comparable Delta V for Mars Departure Other Allocations 150 m/s delta V allocated for the Crew Transfer Vehicle for both the Earth to Mars and the Mars to Earth trajectories. 250 m/s allocated to the Crew Transfer Vehicle for apotwist maneuver around Mars in preparation for departure. 1

AAE450 Senior Spacecraft Design Reference 1 Strategies For the Sustained Human Exploration of Mars, Dr. Damon Landau

AAE450 Senior Spacecraft Design Earth Taxi

AAE450 Senior Spacecraft Design Earth Departure

AAE450 Senior Spacecraft Design Local Gravity

AAE450 Senior Spacecraft Design Earth Departure Transfer constrained by 3 year free return trajectory Developed program on ephemeral data for Earth and Mars. Iteratively solved for appropriate TOF between Mars and Earth Compared velocity of Earth and transfer at departure to calculate V inf Finally, accounted for local gravity