Wind Turbine Blade is mounted on the wind turbine. Most wind turbines have three blades, though there are some with two blades. Blades are generally 30 to 50 meters 100 to 165 feet long, with the most common sizes around 40 meters 130 feet. Longer blades are being designed and tested. Blade weights vary, depending on the design and materials — a 40 meter LM Glasfiber blade for a 1.5 MW turbine weighs 5,780 kg 6.4 tons and one for a 2.0 MW turbine weighs 6,290 kg 6.9 tons. ... Read more