Abstract
˜A new simplie ed approach is developed to analyze the performance of alternative propulsion systems with an additional power source, such as augmented catalytic, nuclear, and electrical propulsion systems. The optimum performance characteristics are calculated for missions with a e xed time of e ight, constant thrust, or constant mass e ow rate, considering the effects of propellant density, tankage fraction, and chemical enthalpy of propellants. A sensitivity analysis is employed to determine the ine uence of different parameters on mass efe ciency.
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