2.1 Thrust Equation and Specific Impulse 2.2 Characteristic Velocity and Thrust Coefficient 2.3 Nozzle Theory and Expansion Ratio 2.4 Mass Flow Rate in Hybrid Systems

7.1 Ignition Transients 7.2 Throttling Capability 7.3 Extinction and Restart 7.4 Scale-Up Limits (O/F Shift, L/D Ratio) Part III: Design Methodologies Chapter 8: Preliminary Design of a Hybrid Rocket Engine 8.1 Mission Requirements and Design Parameters 8.2 Selection of Propellant Combination 8.3 Initial Grain Geometry Design 8.4 Nozzle Sizing and Throat Erosion 8.5 Iterative Performance Prediction

14.1 Multidisciplinary Optimization (Mass, Performance, Cost) 14.2 Trade-offs: Regression Rate vs. Structural Mass 14.3 Throttling Strategy Optimization 14.4 Case Study: Small Sounding Rocket Part V: Advanced Topics and Future Directions Chapter 15: Additive Manufacturing for Hybrid Rockets 15.1 3D-Printed Fuel Grains with Complex Ports 15.2 Embedded Oxidizer and Controlled Porosity 15.3 Rapid Prototyping for Test-Fire Iterations

9.1 Single vs. Multi-Port Configurations 9.2 Web Fraction and Sliver 9.3 Structural Integrity of Fuel Grain 9.4 Manufacturing Techniques (Casting, Additive Manufacturing)

18.1 Safety and Reliability Considerations 18.2 Throttling for Landing (Lunar/Planetary Descent) 18.3 Abort Capability and Restart in Space