Fast Interplanetary Missions with Low-thrust Propulsion Systems PDF Download

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Fast Interplanetary Missions with Low-thrust Propulsion Systems

Fast Interplanetary Missions with Low-thrust Propulsion Systems PDF Author: W. E. Moeckel
Publisher:
ISBN:
Category : Propulsion systems
Languages : en
Pages : 40

Book Description
A simple family of indirect-transfer trajectories between circular orbits is used to evaluate the mass ratio required to complete round-trip interplanetary missions using low-thrust propulsion systems. These trajectories, although not optimum, yielded very substantial reductions in total round-trip time for Mars missions with moderate increases in initial weight. For a powerplant specific weight [alpha] of 10 pounds per kilowatt of jet power, trip times were reduced from 1200 to 600 days, for a typical manned mission, with an initial weight increase of a factor of two. Comparison with a nuclear rocket with 1000-second specific impulse indicated that the electric-propulsion system required less initial weight for trip times as low as 550 days with [alpha]=10 and as low at 400 days with [alpha]=5 pounds per kilowatt. Further weight reductions would be expected with more nearly optimum trajectories.
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