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100-kW hingeless metal wind turbine blade design, analysis and fabricationThe design, fabrication and analysis of aluminum wind turbine rotor blades is discussed. The blades are designed to meet criteria established for a 100-kilowatt wind turbine generator operating between 8 and 60-mile-per-hour speeds at 40 revolutions per minute. The design wind speed is 18 miles per hour. Two rotor blades are used on a new facility which includes a hingeless hub and its shaft, gearbox, generator and tower. Experience shows that, for stopped rotors, safe wind speeds are strongly dependent on blade torsional and bending rigidities which the basic D spar structural blade design provides. The 0.25-inch-thick nose skin is brake/bump formed to provide the basic 'D' spar structure for the tapered, twisted blades. Adequate margins for flutter and divergence are predicted from the use of existing, correlated stopped rotor and helicopter rotor analysis programs.
Document ID
Document Type
Conference Proceedings
Donham, R. E.
(Lockheed-California Co. Burbank, CA, United States)
Schmidt, J.
(Lockheed-California Co. Burbank, Calif., United States)
Linscott, B. S.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Energy Production And Conversion
Meeting Information
Annual National Forum(Washington, DC)
Accession Number
Funding Number(s)
Distribution Limits

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