J. McMichael, Alcoa Technical Center, Alcoa Center, PA; J. E. Barnes, R. Olliffe, J. Walker, Lockheed Martin Aeronautics, Marietta, GA
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 15-20% 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: This presentation will highlight the activities surrounding the re-design effort for a lightweight ramp for the C-130. The re-design effort shows promise for up to a 20% weight reduction using a combination of the most modern analytical codes, materials and manufacturing processes. The presentation review the trade studies and analysis used to arrive at the design, followed by the materials and processes required to make the design real.
