1. Daniel Chua 31 January 2008 Trajectory Simulation Validation of Drag Loss Model – Constant Steering After First Stage Assisted by Amanda Briden, Elizabeth Harkness and Brad Ferris

2. Trajectory Simulation – Drag Loss
Expect smaller launch vehicles to suffer greater drag losses
Expect larger steering angles to result in lower drag losses
Keep steering angle constant
after 1st stage
Run for 2nd and 3rd stage
angles
Trajectory Optimization

3. Trajectory Simulation – Drag Loss
Results:
Compare to Shuttle ( kg GLOM): 107 m/s
Titan IV/Centaur ( kg GLOM): 156 m/s
(from SMAD)
Trajectory Optimization

4. Trajectory Optimization
References
Wertz, J. R., and Larson, W. J., Space Mission Analysis and Design, 3rd ed., Microcosm, 1999
Humble, R.W., and Henry, G.N., Space Propulsion Analysis and Design, 7th ed., McGraw-Hill, 1995
Trajectory Optimization