Analysis Of Trajectory Parameters For Probe And Round Trip Missions To Mars
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Analysis Of Trajectory Parameters For Probe And Round Trip Missions To Mars
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Author : James F. Dugan
language : en
Publisher:
Release Date : 1960
Analysis Of Trajectory Parameters For Probe And Round Trip Missions To Mars written by James F. Dugan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Mars probes categories.
Analysis Of Trajectory Parameters For Probe And Round Trip Missions To Venus
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Author : James F. Dugan
language : en
Publisher:
Release Date : 1960
Analysis Of Trajectory Parameters For Probe And Round Trip Missions To Venus written by James F. Dugan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Planets categories.
For one-way transfers between Earth and Venus, charts are obtained that show velocity, time, and angle parameters as functions of the eccentricity and semilatus rectum of the Sun-focused vehicle conic. From these curves, others are obtained that are useful in planning one-way and round-trip missions to Venus. The analysis is characterized by circular coplanar planetary orbits, successive two-body approximations, impulsive velocity changes, and circular parking orbits at 1.1 planet radii. For round trips the mission time considered ranges from 65 to 788 days, while wait time spent in the parking orbit at Venus ranges from 0 to 467 days. Individual velocity increments, one-way travel times, and departure dates are presented for round trips requiring the minimum total velocity increment. For both single-pass and orbiting Venusian probes, the time span available for launch becomes appreciable with only a small increase in velocity-increment capability above the minimum requirement. Velocity-increment increases are much more effective in reducing travel time for single-pass probes than they are for orbiting probes. Round trips composed of a direct route along an ellipse tangent to Earth's orbit and an aphelion route result in the minimum total velocity increment for wait times less than 100 days and mission times ranging from 145 to 612 days. Minimum-total-velocity-increment trips may be taken along perihelion-perihelion routes for wait times ranging from 300 to 467 days. These wait times occur during missions lasting from 640 to 759 days.
Three Dimensional Trajectory Analysis For Round Trip Missions To Mars
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Author : Gerald Knip
language : en
Publisher:
Release Date : 1962
Three Dimensional Trajectory Analysis For Round Trip Missions To Mars written by Gerald Knip and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Artificial satellites categories.
Three Dimensional Trajectory Analysis For Round Trip Missions To Venus
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Author : Charles L. Zola
language : en
Publisher:
Release Date : 1962
Three Dimensional Trajectory Analysis For Round Trip Missions To Venus written by Charles L. Zola and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Space flight to Venus categories.
Nasa Technical Note
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Author :
language : en
Publisher:
Release Date : 1972
Nasa Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Aeronautics categories.
Payload Capabilities Of Saturn Ib Centaur For Launch Opportunities To Mars In 1971 1973 And 1975 And To Venus In 1972 And 1973
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Author : Gary D. Sagerman
language : en
Publisher:
Release Date : 1966
Payload Capabilities Of Saturn Ib Centaur For Launch Opportunities To Mars In 1971 1973 And 1975 And To Venus In 1972 And 1973 written by Gary D. Sagerman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
Nasa Technical Report
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Author :
language : en
Publisher:
Release Date : 1960
Nasa Technical Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Aerodynamics categories.
Proceedings Of Symposium On Aerothermoelasticity
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Author : David M. Jones
language : en
Publisher:
Release Date : 1962
Proceedings Of Symposium On Aerothermoelasticity written by David M. Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Aerodynamic heating categories.
A symposium on Aerothermoelasticity was held to present the latest significant developments in each scientific area and engineering area that comprise the component parts of this technology. New and significant contributions were presented in four technical areas consisting of dynamic aerothermoelasticity (flutter), stability and control, thermodynamics and aerodynamics (or aerothermodynamics), and structures including material and construction concepts. Categories important and significant to each technical area are discussed state-of-the-art wise. In addition, 26 separate papers are given on items of special importance.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1965
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Mechanics, Applied categories.
Fast Interplanetary Missions With Low Thrust Propulsion Systems
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Author : W. E. Moeckel
language : en
Publisher:
Release Date : 1961
Fast Interplanetary Missions With Low Thrust Propulsion Systems written by W. E. Moeckel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Propulsion systems categories.
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.