 In 2011, Wind Harvest International, Inc. began the process for MCS certification of the Model 636 LAVTS.The Linear Array Vortex Turbine System (LAVTS) consists of three or more Windstar vertical-axis rotors, each with their own 25-75 kW generator, placed in a linear array with each rotor's blades passing within two feet of its neighbor.In this configuration, the center rotors gain an increase in energy output and efficiency.