Variable length blades wind turbine

Energy Unlimited Inc has developed variable length wind turbine blades. These blades are fitted with a tip that automatically extend outwards in response to light winds and retract in stronger winds. This action allows higher energy capture in low wind conditions, while minimizing mechanical loads in high wind conditions. The increase in efficiency associated with this innovative development is found to increase production by as much as 25% over the blades replaced by Variblade.