J. E. Barnes, J. Walker, Lockheed Martin Aeronautics, Marietta, GA; J. McMichael, Alcoa Technical Center, Alcoa Center, PA
The main objective of the Advanced Aluminum Aerostructure Initiative (A3I) program is to achieve cost and weight reductions in aerospace components through an integrated team of the material producer and OEM. Alcoa and Lockheed Martin Aerospace are teamed in A3I to optimize incumbent designs of the Lockheed Martin C-130 Hercules tactical airlifter. Through analytical and materials fabrication approaches, the C-130 Ramp Extensions have been re-designed 40% lighter than the baseline. Concept trade studies were performed before choosing the best combination of weight reduction and manufacturability for low cost. Detailed analysis determined material and manufacturing limitations. While the re-design was mainly driven analytically for weight, manufacturability was a constant theme. Analyses, test results and manufacturing options, including friction stir welding, will be presented.
Summary: The current program is to use new materials, manufacturing methods and analysis tools to provide a reduced weight and more functional ramp for the C-130 tactical airlifter. Upon conclusion, we will have demonstrated through testing that the same capability can be produced at a lighter weight and lower cost.
