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    • Maintenance cost studies of rotary wing commercial transport aircraft 

      Ausrotas, Raymond A.; Hsin, Chen-Chung.; Taneja, Nawal K. (Cambridge, MA : Massachusetts Institute of Technology, Dept. of Aeronautics & Astronautics, Flight Transportation Laboratory, 1974, 1974)
      Introduction: The vertical take-off and landing (VTOL) aircraft market has had substantial growth in the period of the last ten years when one considers the overall number of aircraft in use. The military fleet has continued ...