1. Indigenisation Wind Power
Rotor Blade
By
Akhtar Ali

3. Rotor Blades:GE 1.5 MW 30 M

6. Rotor Blades for Wind Turbine Generators with rated power 1.5 MW and above
Rotor
Bolt Circle
Diameter
Blade
Length
[m]
[mm]
[m]
1.5 MW - 1,7 LM 37.3 P2
MW
77
1800
37,25
LM 37.3 P3
77
1800
37,25
LM 40.3 P2
82
1800
40,00
LM 40.3 P3
82
1800
40,00
LM 40.3 P
82
1800
40,00
Nominal
Power
Output
LM Blade Type
LM 42.1 P
GloBlade1
87
1800
42,13
LM 42.1 P2
GloBlade1
87
1800
42,13

11. Blade Materials
• Wind blades are typically made of fiberglassreinforced epoxy or polyester
• A wind turbine blade is usually manufactured
by forming two half shells in an
aerodynamically engineered pair of molds,
then bonding the two halves together with
adhesive.
• gelcoats, adhesives, polyurethanes,
structural foams, prepreg fabrics,

12. Process-I:Manual
• Hand lay-up, open mold process
Wind turbine blades are often fabricated
by hand lay-up: cutting sheets of fiberglass
cloth to fit the mold, laying the pieces into the
mold, infusing resins to the fiber, and letting it
cure.

13. Vacuum resin infusion
• Currently, vacuum resin infusion is probably
the most dominant processing method for
manufacturing wind turbine blades.
• During the vacuum-assisted resin transfer
molding (RTM) process, fiber reinforcements
are placed into a mold, formed into shape,
and resins are then applied to the fibers