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      AL91A2

      AL91A2

      Technical data
      Blade length91m
      Design type classIEC S
      Max. chord length4.8m
      Pre-bending6.5m
      Pre-cone angle/can be different0°
      Mass without  T-Bolt23.7t
      Mass of  T-bolt   615kg
      Radius center of mass25.876m
      Design  operation life 20years
      MaterialE/H-glass  reinforced Epoxy
      Operation Parameter
      Rated power5.x MW
      Rotor Diameter185m
      Number of blades3
      Power controlPitchable &  Variable-speed
      Speed range5-10rpm
      Rated tip speed87.13m/s
      Rated rotor speed9rpm
      Optimal tip speed ratio11.2
      Performance coefficient at TSR-opt0.477
      Blade Connection
      PrincipleInsert
      Bolt hole circle diameter3200mm
      Number, Size of tension bolts128xM36X4.0 10.9
      Outer diameter of root3310mm


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