Thinking Obliquely: Robert T. Jones, the Oblique Wing, NASA's AD-1 Demonstrator, and its Legacy
Bruce I. Larrimer
Engineering & Transportation
Thinking Obliquely: Robert T. Jones, the Oblique Wing, NASA's AD-1 Demonstrator, and its Legacy
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On December 21, 1979, the National Aeronautics and Space Administration (NASA) AD-1 Oblique Wing Research Aircraft (OWRA) took off from the main runway at Edwards Air Force Base (AFB), CA, for a 45-minute checkout flight. It marked the world’s first flight of a piloted oblique-wing airplane. This historic flight, which was flown with the airplane’s wing at its “straight” (0-degree angle) position, was soon followed by flights at wing angles of 15 degrees, 20 degrees, 45 degrees, and finally on April 24, 1981, at the 60-degree-angle design goal, thus proving the aerodynamic concept of an airplane with an oblique-wing configuration. This initial oblique-wing program, which ran from 1976 through 1982, was a joint effort between NASA’s Ames Research Center and Dryden Flight Research Center, CA, thus giving rise to the aircraft’s name: Ames-Dryden AD-1 Oblique Wing Research Aircraft. Chapter 1 reviews the life of NASA aerodynamicist Robert T. Jones and his path to the oblique wing. Chapter 2 covers the extensive wind tunnel, model, computer-code, and simulation testing, first at Langley and later at Ames, as well as a number of NASA industry design contracts undertaken by Boeing and Lockheed. Chapter 3 reviews the design and fabrication of the AD-1 Oblique Wing Research Aircraft and its subsequent proposed use as a joined-wing demonstrator. Chapter 4 describes the flight testing and flight evaluation of the AD-1. Chapter 5 reviews the supersonic F-8 followup oblique-wing program. And, finally, chapter 6 reviews the subsequent oblique-wing plans and proposals. Appendices present the physical characteristics of the AD-1 aircraft, a detailed description of it, and a summary flight log of its flight research program.

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Chapter 1:American Genius
Chapter 2:Evolving the Oblique Wing
Chapter 3: Design and Fabrication of the AD-1 Research Aircraft
Chapter 4: Flight Testing and Evaluation of the AD-1
Chapter 5: Beyond the AD-1
Chapter 6: Subsequent Oblique-Wing Plans and Proposals
Appendix 1: Physical Characteristics of the Ames-Dryden AD-1 OWRA
Appendix 2: Detailed Description of the Ames-Dryden AD-1 OWRA
Appendix 3: Flight Log Summary for the Ames-Dryden AD-1 OWRA
Selected Bibliography
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