1.3.4    Turbine Based Jet Engines (Flyback Boosters)

1.3.5    Ramjet/Scramjet Engines (Accelerators)

1.3.6    Deeply Cooled Air Cycles

1.3.7    Air Collection and Enrichment System

1.3.8    Fundamental Air Breathing Propulsion Technologies

1.4   Ancillary Propulsion Systems

1.4.1    Auxiliary Control Systems

1.4.2    Main Propulsion Systems (Excluding Engines)

1.4.3    Launch Abort Systems

1.4.4    Thrust Vector Control Systems

1.4.5    Health Management and Sensors

1.4.6    Pyro and Separation Systems

1.4.7    Fundamental Ancillary Propulsion Technologies

1.5   Unconventional /Other Propulsion Systems

1.5.1    Ground Launch Assist

1.5.2    Air Launch /Drop Systems

1.5.3    Space Tether Assist

1.5.4    Beamed Energy /Energy Addition

1.5.5    Nuclear

1.5.6    High Energy Density Materials/Propellants

TA02 In-Space Propulsion Technologies

2.1   Chemical Propulsion

2.1.1    Liquid Storable

2.1.2    Liquid Cryogenic

2.1.3    Gels

2.1.4    Solid

2.1.5    Hybrid

2.1.6    Cold Gas/Warm Gas

2.1.7    Micro-Propulsion

2.2   Non-Chemical Propulsion

2.2.1    Electric Propulsion

2.2.2    Solar Sail Propulsion

2.2.3    Thermal Propulsion

2.2.4    Tether Propulsion

2.3   Advanced (TRL <3) Propulsion Technologies

2.3.1    Beamed Energy Propulsion

2.3.2    Electric Sail Propulsion

2.3.3    Fusion Propulsion

2.3.4    High Energy Density Materials

2.3.5    Antimatter Propulsion

2.3.6    Advanced Fission

2.3.7    Breakthrough Propulsion

2.4   Supporting Technologies

2.4.2    Propellant Storage and Transfer



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