SST Technology Follow-on Program-Phase II. Development and Evaluation of the Aluminum-Brazed Titanium System. Volume VII. Producibility and Costs.
Final rept. on Task 1,
BOEING COMMERCIAL AIRPLANE CO SEATTLE WA
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Fabrication of the complex aluminum-brazed titanium honeycomb sandwich panels for the SST prototype was initially estimated. A producibility analysis was conducted on the DOTSST Phase II technology follow-on program to a identify principal fabrication cost elements, b develop conceptual approaches to reduce such costs, and c provide recommendations for further cost reduction. Using SST prototype data as baseline, the principal manufacturing cost elements were identified as machining, core assembly, panel assembly, and inspection NDT. Analyses reveal that detail machining and core assembly costs are primarily design-related, while core machining and NDT costs are basically process-related. Factors developed for principal cost elements were reapplied to SST prototype panel designs. Results showed a more realistic cost for such panels, dependent on panel complexity. Three new panel design concepts and a proposed NDT procedure show potential for reduced costs. Heat source studies define established and new approaches for brazing operations. Recommendations are made for fabrication and test of new panel designs, studies of lower cost honeycomb core manufacturing techniques, more effective NDT techniques, and competitive heat sources.
- Transport Aircraft
- Metallurgy and Metallography