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      Al90A

      Al90A

      Technical data                 
      Blade length 90m
      Design type class   IEC S
      Max. chord length   4.6m
      Pre-bending    6.0m
      Pre-cone angle/can be different 0°
      Mass without  T-Bolt 23t
      Mass of  T-bolt     514kg
      Design  operation life    20years
      Material   E/H-glass  reinforced Epoxy
      Operation Parameter            
      Rated power 4.x MW
      Rotor Diameter 183m
      Number of blades3
      Power control  Pitchable &  Variable-speed
      Speed range 5.5-10.5rpm
      Rated tip speed89.2m/s
      Rated rotor speed  9.25rpm
      Optimal tip speed ratio12.2
      Performance coefficient at TSR-opt 0.48
      Blade Connection            
      Principle Insert
      Bolt hole circle diameter2800mm
      Number, Size of tension bolts112xM36X4.0 10.9
      Outer diameter of root2900mm


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