Fast Interplanetary Missions with Low-thrust Propulsion Systems PDF Download
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Author: W. E. Moeckel
Publisher:
ISBN:
Category : Propulsion systems
Languages : en
Pages : 40
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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.
Author: W. E. Moeckel
Publisher:
ISBN:
Category : Propulsion systems
Languages : en
Pages : 40
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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.
Author: W. E. Moeckel
Publisher:
ISBN:
Category : Propulsion systems
Languages : en
Pages : 44
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Book Description
Author: Stephen Kemble
Publisher: Springer Science & Business Media
ISBN: 3540376453
Category : Technology & Engineering
Languages : en
Pages : 511
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Book Description
The present impetus to drive down the overall cost of space missions is leading to ever-increasing demands for more efficient design techniques over a wide range of interplanetary missions, and the methods now being utilised to do this are described in this timely and authoritative work.
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 798
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ISBN:
Category :
Languages : en
Pages : 16
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1352
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Author: Jack B. Esgar
Publisher:
ISBN:
Category : Gas
Languages : en
Pages : 732
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Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 340
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Book Description
Author: Michael Matthew Micci
Publisher: AIAA
ISBN: 9781600864391
Category : Microspacecraft
Languages : en
Pages : 520
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Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 1096
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Book Description
