**Acknowledgements**

Robert Webster, Richard A. Schroeder Professor of Mechanical Engineering at Vanderbilt University, provided invaluable criticism and insights into prior publications of the author on this subject, and he continues to provide ongoing support for the work of Albireo. Professors Bill Obremskey and Duke Herrell of Vanderbilt University provided insightful comments to earlier work on this subject, along with Steve Slattery. Professor Ted Fischer of Vanderbilt University, and fellow members of Nashville's Old Oak Club, provided important feedback and timely encouragement for continued pursuit of this project.

Professor Caleb Rucker, Associate Professor of Engineering at the University of Tennessee, provided vital criticism of the physical principles and mathematical models in earlier publications of this work, causing the descriptions and mathematical model presented here to have greater accuracy, relevance, and significance.

Dean Chris Guthrie of the Vanderbilt School of Law has provided welcome institutional support throughout this entire project.

The reviewers and editors of the *Journal of Space Exploration* were notably supportive of this project at its earliest stage. As well, the scientists and engineers of the American Institute of Aeronautics and Astronautics (AIAA) who invited subsequent papers and participated in working sessions associated with this project were extremely helpful.

The excellent editorial work of Bob Kirsch, who edited prior work in this area by the author, dramatically improved the communication of the ideas presented in this chapter.

Any errors or failures here are solely the responsibility of the author.
