- TASK 2.1 DESIGN OF THE NOZZLE JOINT ATK TASKS (WBS 2.0) BEGIN WITH A DESIGN FOR THE NOZZLE JOINT. ATK SHALL DEVELOP A MECHANICAL DESIGN OF SUFFICIENT DETAIL FOR THERMAL AND STRUCTURAL ANALYSIS OF THE JOINT. THE MECHANICAL DESIGN PART FILES SHALL ENABLE THERMAL/STRUCTURAL AND COMPUTATIONAL FLUID DYNAMICS (CFD) ANALYSTS TO WORK ON A CONSISTENT GEOMETRY. TASK 2.2 SOLID MODEL OF THE NOZZLE EXTENSION AT THREE DIFFERENT POSITIONS THE NASA-OPTIMIZED CONTOURS SHALL BE USED TO DEVELOP THE MECHANICAL DESIGN OF THE NOZZLE EXTENSION. THE PATTERN SHALL BE LAID OUT AND MECHANICAL DESIGNS SHALL BE CREATED FOR 3 DIFFERENT POSITIONS. THESE PART FILES WILL BE USED IN THE CFD, THERMAL, AND STRUCTURAL ANALYSES OF THE NOZZLE EXTENSION IN DIFFERENT NOZZLE SHAPES. THESE SHAPES WILL BE USED BY NASA TO DETERMINE THE DELIVERED ISP OF THE NOZZLE AND TO ASSESS THERMAL AND STRESS ENVIRONMENTS FOR THE STEADY STATE OPERATION. TASK 2.3 PRELIMINARY EVALUATION OF MANUFACTURABILITY THE THIRD PART OF ATK S TASK IS A PRELIMINARY ASSESSMENT OF THE MANUFACTURABILITY (AVAILABILITY OF BILLETS, APPROACHES FOR HANDLING SUCH LARGE PARTS, ETC.).