PROPOSAL SUMMARY: AERODYNAMIC TABS FOR CONTROL OF HYPERSONIC ATMOSPHERIC ENTRY TRAJECTORIES THE UC DAVIS CENTER FOR HUMAN/ROBOTICS/VEHICLE INTEGRATION AND PERFORMANCE PROPOSES TO ADD A COMPUTATIONAL AEROSCIENCES RESEARCH ELEMENT TO THE EXISTING AND ONGOING NASA PROJECT PTERODACTYL: INTEGRATED CONTROL DESIGN FOR PRECISION TARGETING OF DEPLOYABLE ENTRY VEHICLES LED AT NASA AMES RESEARCH CENTER BY DR. SARAH D SOUZA. THE OBJECTIVES OF THE PROPOSED WORK ARE TO UTILIZE MODERN NASA COMPUTATIONAL ANALYSIS CODES TO EXPLORE AND DOCUMENT THE SENSITIVITIES OF ENTRY-VEHICLE STEERING TORQUES GENERATED BY VARIABLE-ANGLE AERODYNAMIC TABS ARRANGED CIRCUMFERENTIALLY AROUND THE PTERODACTYL CORE STRUCTURE. THESE OBJECTIVES WILL BE MET BY APPLICATION OF THE NASA CODES CBAERO AND CART3D TO COMPUTE THE SUPERSONIC AND HYPERSONIC FLOW ABOUT PTERODACTYL GEOMETRIES. PREVIOUSLY OBTAINED NASA WIND TUNNEL DATA ON SIMILAR CONFIGURATIONS WILL PROVIDE EXPERIMENTAL VALIDATION OF THE COMPUTATIONAL RESULTS. THIS PROJECT IS A TECHNOLOGY-ENABLING COMPONENT OF NASA S EFFORT TO PROVIDE GUIDED RE-ENTRY WITH A NEW CLASS OF VARIABLE-GEOMETRY ENTRY VEHICLES.