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      Al91B

      Al91B

      Technical data                 
      Blade length 91m
      Design type class   IEC S
      Max. chord length   4.8m
      Pre-bending    5.8m
      Pre-cone angle/can be different 0°
      Mass without  T-Bolt 23t
      Mass of  T-bolt     514kg
      Radius center of mass 26.622m
      Design  operation life    20years
      Material   E/H-glass  reinforced Epoxy
      Operation Parameter            
      Rated power 4.x MW
      Rotor Diameter 185m
      Number of blades3
      Power control  Pitchable &  Variable-speed
      Speed range 5-10rpm
      Rated tip speed90.10m/s
      Rated rotor speed  9.25rpm
      Optimal tip speed ratio11.2
      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 root2910mm


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