FrontMatter -- Preface -- Acknowledgments -- Contents -- Tables and Figures -- Executive Summary -- 1 Foundation for Change -- 2 Improving the Air Transportation System -- 3 System Modeling and Simulation -- 4 Improving Aircraft Performance -- 5 Process for Change -- Findings, Recommendations, and the Big Question -- Appendixes -- A Statement of Task and Study Approach -- B Comparative Assessment of Goals and Visions -- C Biographies of Committee Members -- D Propulsion Taxonomy: Comments on Propulsion Fundamentals -- E Four Levels of Models -- F Acronyms and Abbreviations.