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 
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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