Download or read book Physiologically Constrained Aerocapture for Manned Mars Missions written by James Evans Lyne and published by . This book was released on 1992 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiologically Constrained Aerocapture for Manned Mars Missions written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-18 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerobraking has been proposed as a critical technology for manned missions to Mars. The variety of mission architectures currently under consideration presents aerobrake designers with an enormous range of potential entry scenarios. Two of the most important considerations in the design of an aerobrake are the required control authority (lift-to-drag ratio) and the aerothermal environment which the vehicle will encounter. Therefore, this study examined the entry corridor width and stagnation-point heating rate and load for the entire range of probable entry velocities, lift-to-drag ratios, and ballistic coefficients for capture at both Earth and Mars. To accomplish this, a peak deceleration limit for the aerocapture maneuvers had to be established. Previous studies had used a variety of load limits without adequate proof of their validity. Existing physiological and space flight data were examined, and it was concluded that a deceleration limit of 5 G was appropriate. When this load limit was applied, numerical studies showed that an aerobrake with an L/D of 0.3 could provide an entry corridor width of at least 1 degree for all Mars aerocaptures considered with entry velocities up to 9 km/s. If 10 km/s entries are required, an L/D of 0.4 to 0.5 would be necessary to maintain a corridor width of at least 1 degree. For Earth return aerocapture, a vehicle with an L/D of 0.4 to 0.5 was found to provide a corridor width of 0.7 degree or more for all entry velocities up to 14.5 km/s. Aerodynamic convective heating calculations were performed assuming a fully catalytic, 'cold' wall; radiative heating was calculated assuming that the shock layer was in thermochemical equilibrium. Heating rates were low enough for selected entries at Mars that a radiatively cooled thermal protection system might be feasible, although an ablative material would be required for most scenarios. Earth return heating rates were generally more severe than those encountered by the Apollo vehicles, ...
Download or read book A Study of the Earth Return Aerocapture for a Manned Mars Mission written by William Donald Muth and published by . This book was released on 2000 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mission to Mars written by James E. Oberg and published by Stackpole Books. This book was released on 2017-09-15 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: How feasible is a manned Mars flight? How soon will it be possible? How long will it take? What kind of spacecraft will make the journey? What kind of data will be collected? What are the advantages of a manned flight over an unmanned? Mission to Mars discusses these questions and more in this serious, documented treatment of the not-too-distant manned expedition to Mars. The shuttle has proved successful and an enthusiastic boost to American interest in space. But while many laypeople wonder “what’s next,” scientists are planning what they feel is the next logical step. Drawing on the vast amount of data sent back by Viking orbiters and probes, and existing developments in propulsion and space technology, space experts all over have been speculating, analyzing, and exchanging ideas relative to the long-awaited mission to Mars. Other factors, critical to an intelligent discussion of such an undertaking are included here: spaceship design and assembly, propulsion systems, navigation principles, life support systems, selecting a landing site, scientific activities on Mars, cost factors, political and social issues.
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1993 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1993 with total page 1786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science and Technology Series written by and published by . This book was released on 1972 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 41st AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit 10 13 July 2005 Tucson Arizona 05 4100 05 4149 written by and published by . This book was released on 2005 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Guidance Control and Dynamics written by and published by . This book was released on 2008 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Tunnel Studies of Scramjet Phenomena 1994 written by R. G. Morgan and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 18th AIAA Aerospace Ground Testing Conference written by and published by . This book was released on 1994 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IAF92 0733 IAF92 0786 written by and published by . This book was released on 1992 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wernher Von Braun s 1969 Manned Mars Mission Plans After Apollo and the Boeing 1968 Integrated Manned Interplanetary Nuclear Spacecraft Concept Definition Study written by World Spaceflight News and published by . This book was released on 2017-01-13 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the success of the Apollo 11 landing on the Moon, Wernher von Braun presented an ambitious plan for manned missions to Mars as soon as the 1980s to the Space Task Group for consideration by President Richard Nixon as the next step in America's space program. Nixon rejected the plan, and the goal of humans on Mars remains unfulfilled. Here are the technical details of his incredible nuclear rocket powered proposal, which was based on studies by Boeing in 1968. Contents: Boeing 1968 Study Volume 1 * Boeing 1968 Study Volume 2 * 1969 von Braun Manned Mars Mission Proposal * von Braun's Integrated Space Program, 1970-1990. In his presentation, von Braun wrote: With the recent accomplishment of the manned lunar landing, the next frontier is manned exploration of the planets. Perhaps the most significant scientific question is the possibility of extraterrestrial life in our solar system. Manned planetary flight provides the opportunity to resolve this universal question thus capturing international interest and cooperation. The information presented here describes a method of landing men on the planet Mars in 1982. The scientific goals of the mission are described and the key decision dates are identified. The 1981 manned Mars mission (1982 landing on Mars) is shown as an integral part of the total space program for the next two decades. The systems and experience resulting from the Apollo program and the missions proposed for the 1970's provide the technical and programmatic foundation for this undertaking. A 1982 manned Mars landing is a logical focus for the programs of the next decade. Although the undertaking of this mission will be a great national challenge, it represents no greater challenge than the commitment made in 1961 to land a man on the moon. Several different modes are possible for accomplishing Mars landing missions, each with its peculiar advantages and disadvantages. The typical Mars Landing Mission begins with the boost of the planetary vehicle elements into Earth orbit utilizing the Saturn V and Space Shuttle vehicles. Following assembly of the complete planetary vehicle in Earth orbit, the Earth departure phase of the mission is initiated. The Mars vehicle then begins a 270-day journey to Mars. This is by no means an idle phase of the mission. In addition to observations of Mars, many other experiments and measurements will be made on both the Earth-to-Mars and Mars-to-Earth legs of the trip that are of prime scientific importance. The spacecraft represents a manned laboratory in space, free of the disturbing influences of the Earth. The fact that there will be two observation points, Earth and the spacecraft, permits several possible experiments regarding the temporal and spatial features of the interplanetary environment. In addition, the spacecraft can be used to supplement and extend numerous observations conducted from Earth orbital space stations, particularly in the field of astronomy. It is possible, for example, that as yet unidentified comets might be observed for the first time.
Download or read book Strategies for Mars written by Carol R. Stoker and published by . This book was released on 1996 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
