Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Roger X. Lenard"'
Autor:
Roger X. Lenard, Dana G. Andrews
Publikováno v:
Acta Astronautica. 61:450-458
Interstellar transportation to nearby star systems over periods shorter than the human lifetime requires speeds in the range of 0.1–0.15 c and relatively high accelerations. These speeds are not attainable using rockets, even with advanced fusion e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea0154c900319b30168bacaad5fb76be
https://doi.org/10.1016/j.actaastro.2007.01.052
https://doi.org/10.1016/j.actaastro.2007.01.052
Autor:
Roger X. Lenard
Publikováno v:
Acta Astronautica. 57:404-414
From October 1987 until 1993, the US Department of Defense conducted the Space Nuclear Thermal Propulsion program. This program's objective was to design and develop a high specific impulse, high thrust-to-weight nuclear thermal rocket engine for upp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bc58f02b043fb98b8a94da46f98cdf2
https://doi.org/10.1016/j.actaastro.2005.03.056
https://doi.org/10.1016/j.actaastro.2005.03.056
Autor:
Roger X. Lenard
Publikováno v:
Space Policy. 17:285-289
The development and exploitation of nuclear power and propulsion represent certain didactic imperatives for human civilization. Among these are economic, epistemological, moral and commercial propositions. Developing space nuclear power and propulsio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1bd41560338122f15172e4c6599a1a5
https://doi.org/10.1016/s0265-9646(01)00043-1
https://doi.org/10.1016/s0265-9646(01)00043-1
Publikováno v:
43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit.
This paper discusses progress achieved during a three-year internal Sandia National Laboratories Laboratory Directed Research and Development project, funded through the Department of Energy. This research was conducted as an adjunct research project
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49825b4014bfdaae3d08307918ed687b
https://doi.org/10.2514/6.2007-5252
https://doi.org/10.2514/6.2007-5252
Autor:
Roger X. Lenard, David M. McMahon
Publikováno v:
57th International Astronautical Congress.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7712acc7e448d377d7d14738b2222ae6
https://doi.org/10.2514/6.iac-06-c2.8.09
https://doi.org/10.2514/6.iac-06-c2.8.09
Autor:
Roger X. Lenard, Dana G. Andrews
Publikováno v:
57th International Astronautical Congress.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78b3f9f06602968b54de6f378ac88d3a
https://doi.org/10.2514/6.iac-06-d2.8.02
https://doi.org/10.2514/6.iac-06-d2.8.02
Autor:
Dana G. Andrews, Roger X. Lenard
Publikováno v:
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit.
This program led to considerable analytical and experimental ef fort that provided tantalizing, but inconclusive compression results. This paper discusses our proposed follow -on effort. This follow -on effort would provide more analytical detail whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eba6b00f2d277cc57f6c8793c77da19
https://doi.org/10.2514/6.2006-5223
https://doi.org/10.2514/6.2006-5223
Publikováno v:
Space 2005.
Lunar Post power requirements for the Moon/Mars Exploration program have not been established yet since they depend on NASA defined crew size, exploration program content, mission duration, mission location(s), extent of ISRU use and many other facto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a4dec74c4609caa27e7b5bf0f8eebab
https://doi.org/10.2514/6.2005-6696
https://doi.org/10.2514/6.2005-6696
Publikováno v:
AIP Conference Proceedings.
The Indium Field Emission Thruster (In‐FET) is a highly characterized and space‐proven device based on space‐qualified liquid metal ion sources. There is also extensive experience with liquid metal ion sources for high‐brightness semiconducto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baab58e89d88a9005467c3602cdcc807
https://doi.org/10.1063/1.1867220
https://doi.org/10.1063/1.1867220
Autor:
Roger X. Lenard, David I. Poston, Regina A. Talandis, Robert S. Reid, Albert C. Marshall, Jay S. Elson, Richard J. Kapernick, Ray M. Guffee, Ronald J. Lipinski, Steven A. Wright, James H. Lee, Martin P. Sherman
Publikováno v:
AIP Conference Proceedings.
Two nuclear electric propulsion (NEP) power system configurations are presented, each with an output power of 50 kWe and a system mass of about 2500 kg. Both consist of a reactor coupled to a recuperated Brayton power conversion system with a fixed c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::586e07f82fa307e9c0c573a5d1042032
https://doi.org/10.1063/1.1449837
https://doi.org/10.1063/1.1449837