A wind turbine system includes turbine blades connected to a nose hub that is connected to a main turbine shaft. A flywheel is mounted around the main turbine shaft proximate to the nose hub. A bearing assembly is fixed to a turbine tower and is mounted around at least a portion of the flywheel. The bearing assembly includes a bearing housing and a main bearing fixed therein having a main bearing faced adapted to be in contact with or within a close tolerance to the circular outside diameter surface of the flywheel. This main bearing may be comprised of lignum vitae wood.