115:, was the first instance of NASA research into ISRU production of liquid methane-based rocket propellants for a long-duration crewed missions to Mars' surface and return strategy. As initial detailed work of this type, it directly inspired "Mars Direct" and "Mars Semi-Direct" approaches in the following decades, although NASA shifted focus and fiscal resources to LEO and the ISS soon thereafter, versus continuing Moon-to-Mars exploration. As Mars exploration becomes more widely accepted, with the popular examples of
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131:(and others) beginning in the early 1990s, pioneered the difficult task of showing ISRU's benefits for long-duration, deep space and interplanetary surface exploration. Use of ISRU is now considered central to the feasibility of any mission to Mars or beyond, and remains an area of very active research.
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Bushnell, D. M., Hefner, J. N., and Ash, R. L. (1977). "Effect of
Compliant Wall Motion on Turbulent Boundary Layers. presented at the I.U.T.A.M. Symposium on Structure of Turbulence and Drag Reduction,
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Khorrami, Mehdi R.; Malik, Mujeeb R.; Ash, Robert L. (1989). "Application of
Spectral Collocation Techniques to the Stability of Swirling Flows".
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Khorrami, M. R., Malik, M. R., and Ash, R. L. (1989). "Application of
Spectral Collocation Techniques to the Stability of Swirling Flows."
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Groundbreaking for the era published and notable yet, Dr. Ash's In-Situ
Resource Utilization (ISRU) paper, authored in 1978 as a visiting
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with a
Bachelor of Science in Mechanical Engineering. Ash's father-in-law was Lewis Webb Jr., who served as the first president of
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Ash, R. L., Dowler, W. L., and Varsi, G. (1978). "Feasibility of Rocket
Propellant Production on Mars."
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is a
Professor of Mechanical & Aerospace Engineering and an Eminent Scholar at
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5, (pp. 705–724). (cited 100 times, according to Google
Scholar)
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81, (pp. 206–229).(cited 150 times, according to Google
Scholar)
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20 (10 part 11), (pp. S31-S58)." (cited 170 times according to
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