The report presents the work done in evaluating the design concepts applicable to helicopter main rotor blades; assessing cost, repairability, maintainability, and survivability; and determining overall blade-related costs for the helicopter life cycle. The concept showing the most potential for improved operating costs, without technical compromise, is chosen the most potential for improved operating costs, without technical compromise, is chosen for further development. The application of maintainability and reliability criteria during the preliminary design phase has resulted in a significant theoretical reduction in potential blade-related life-cycle costs. These criteria were applied to all the field repairable/expendable main rotor blade concepts examined, and all show a reduction in cost below that of the current blade. The selected concept has extruded aluminum spar and trailing-edge spline, grass-fiber-reinforced-plastic skins, nylon paper honeycomb core, and built-up laminated metal root. (Author)


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    Title :

    Development Program for Field-Repairable/Expendable Main Rotor Blades. Phase I. Preliminary Design


    Contributors:

    Publication date :

    1974


    Size :

    316 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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