became chief engineer of advanced development projects in the Lockheed Martin Skunk Works. During that time he played a leading role in creating the Joint Strike Fighter program and invented the lift fan propulsion system that makes it possible to build variants of a single stealthy, supersonic V/STOL aircraft for the Air Force, Marines, and Navy. Prior to joining Lockheed Martin, he managed advanced programs at Rockwell International’s Navy aircraft plant. He began his career as a captain in the U.S. Air Force and deputy director of the Energy Conversion Laboratory at Wright Patterson Air Force Base. Dr. Bevilaqua has a B.S. from the University of Notre Dame and graduate engineering degrees from Purdue University. He is a member of the NAE and a fellow of the American Institute of Aeronautics and Astronautics (AIAA). He is the recipient of an Air Force Scientific Achievement Award for his contributions to turbulence theory, the AIAA Newbold Award for his contributions to V/STOL aircraft technology, the AIAA and Society of Automotive Engineers (SAE) aircraft design awards for his contributions to aircraft design, and the Collier Trophy for his lift fan propulsion system. His publications include articles in the journals of the AIAA, the journals of the Royal Aeronautical Society, and the proceedings of many meetings and symposia. He has served on three other NRC committees: the Committee on Sea Basing: Ensuring Joint Force Access from the Sea, the Panel on Aerodynamics and Aeroacoustics of the Decadal Survey of Civil Aeronautics, and the Panel on Air and Ground Vehicle Technology.

JEFFREY CROUCH is a senior technical fellow in the enabling technology and research organization at Boeing Commercial Airplanes. Dr. Crouch received his Ph.D. in engineering mechanics from Virginia Tech. Prior to joining the Boeing Company in 1992, he was an ONT postdoctoral fellow at the Naval Research Laboratory. His responsibilities at Boeing include research, consultation, and technology development. His research has considered topics in hydrodynamic stability, boundary-layer transition prediction, laminar-flow control, transonic-buffet prediction, wake-vortex instabilities, and modeling and control of wake vortices. Dr. Crouch’s research on wake vortices led to the discovery of new instabilities and new concepts for wake vortex alleviation. He has published over 50 papers and recently was co-editor of a special issue of the French Academy of Sciences journal Comptes Rendus Physique entitled “Airplane Trailing Vortices.”

FREDERICK GREGORY is the managing director of aerospace and defense strategies at Lohfeld Consulting Group. He retired as the deputy administrator of NASA in 2005. Management positions at NASA included acting administrator, associate administrator for spaceflight, and associate

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