FrontMatter -- Preface -- Acknowledgment of Reviewers -- Contents -- Tables, Figures, and Boxes -- Executive Summary -- 1 Introduction -- 2 Process for Integration and Prioritization -- 3 Research and Technology Challenges -- 4 Common Themes and Key Barriers -- 5 Findings and Recommendations -- Appendixes -- A R&T Challenges for Aerodynamics and Aeroacoustics -- B R&T Challenges for Propulsion and Power -- C R&T Challenges for Materials and Structures -- D R&T Challenges for Dynamics, Navigation, and Control, and Avionics -- E R&T Challenges for Intelligent and Autonomous Systems, Operations and Decision Making, Human Integrated Systems, and Networking and Communications -- F Lessons Learned from Other Federal Agencies -- G Statement of Task and Work Plan -- H Biographies of Committee and Panel Members -- I Speakers -- J Acronyms and Abbreviations.