Abstract: A collapsible rotor assembly and a method to assemble the rotor assembly are disclosed. The rotor assembly may include a mast, a blade, a first arm and a second arm. The rotor assembly may further include a first connection member attached to a mast top portion and a second connection member attached to a mast bottom portion. The rotor assembly may additionally include a third connection member attached to a blade top portion and a fourth connection member attached to a blade bottom portion. A first arm distal end may be pivotally attached with the first connection member and a first arm proximal end may be pivotally attached with the third connection member. Furthermore, a second arm distal end may be removably attached with the second connection member and a second arm proximal end may be pivotally attached with the fourth connection member.

Abstract: A vertical axis wind turbine with variable thickness blade is disclosed. The wind turbine may include a blade including a skin having a first skin section and a second skin section. A first skin section thickness may be greater than a second skin section thickness. The blade may further include a bracketed structural member disposed on the first skin section. The bracketed structural member may include one or more L-shaped brackets. The wind turbine may further include a nut bar, which may be a flat nut bar. The bracketed structural member may be configured to hold the nut bar between the L-shaped brackets. The wind turbine may further include an arm connecting bracket that may be configured to attach the arm to the blade via the nut bar. The wind turbine may further include a transition fairing that may attach to the blade via the nut bar.

Abstract: A vertical axis wind turbine is disclosed. The wind turbine may include a polygonal mast having a predefined count of faceted sides. The polygonal mast may include a mast top end and a mast bottom end. The wind turbine may further include a drive shaft having a polygonal drive shaft top end and a drive shaft bottom end. The polygonal drive shaft top end may be configured to connect the mast bottom end with the drive shaft. The polygonal drive shaft top end too may have the predefined count of faceted sides.

Abstract: A collapsible rotor assembly and a method to assemble the rotor assembly are disclosed. The rotor assembly may include a mast, a blade, a first arm and a second arm. The rotor assembly may further include a first connection member attached to a mast top portion and a second connection member attached to a mast bottom portion. The rotor assembly may additionally include a third connection member attached to a blade top portion and a fourth connection member attached to a blade bottom portion. A first arm distal end may be pivotally attached with the first connection member and a first arm proximal end may be pivotally attached with the third connection member. Furthermore, a second arm distal end may be removably attached with the second connection member and a second arm proximal end may be pivotally attached with the fourth connection member.

Abstract: A vertical axis wind turbine is disclosed. The wind turbine may include a polygonal mast having a predefined count of faceted sides. The polygonal mast may include a mast top end and a mast bottom end. The wind turbine may further include a drive shaft having a polygonal drive shaft top end and a drive shaft bottom end. The polygonal drive shaft top end may be configured to connect the mast bottom end with the drive shaft. The polygonal drive shaft top end too may have the predefined count of faceted sides.

Abstract: A vertical axis wind turbine with variable thickness blade is disclosed. The wind turbine may include a blade including a skin having a first skin section and a second skin section. A first skin section thickness may be greater than a second skin section thickness. The blade may further include a bracketed structural member disposed on the first skin section. The bracketed structural member may include one or more L-shaped brackets. The wind turbine may further include a nut bar, which may be a flat nut bar. The bracketed structural member may be configured to hold the nut bar between the L-shaped brackets. The wind turbine may further include an arm connecting bracket that may be configured to attach the arm to the blade via the nut bar. The wind turbine may further include a transition fairing that may attach to the blade via the nut bar.

Abstract: A vertical axis wind turbine is disclosed. The wind turbine may include a mast, a first arm, a second arm, a blade, a first vertical bracing member, and a second vertical bracing member. The first arm may be attached to the mast at a first mast connection point, and the second arm may be attached to the mast at a second mast connection point via respective arm proximal ends. The blade may be attached to the first arm and the second arm via respective arm distal ends. The first vertical bracing member may connect the mast with the first arm, and the second vertical bracing member may connect the mast with the second arm. The wind turbine may further include one or more horizontal bracing members connecting adjacent wind turbine arms.

Abstract: A polygonal mast connected to an arm of a vertical axis wind turbine via a hinged connection member is disclosed. The connection member may include an L-shaped bracket having a first portion and a second portion disposed perpendicular to the first portion. The first portion may be attached to a mast exterior surface. The connection member may further include a first plate and a second plate. The first plate may be attached to the second portion and first plate plane may be disposed perpendicular to mast longitudinal axis. The second arm may be attached to an arm distal end and second plate plane may be disposed parallel to arm longitudinal axis. The connection member may additionally include a first pivot connector and a second pivot connector pivotally connecting the first plate and the second plate. The arm distal end may be disposed between the first and second pivot connectors.

Abstract: A connection member to connect a blade with an arm of a vertical axis wind turbine is disclosed. The connection member may include a bracket including a bracket plate. A bracket plate curvature may be equivalent to a blade inside portion skin curvature. The bracket plate may include a first connection insert configured to receive a first fastener. The bracket plate may be attached to the blade via the first fastener. The connection member may further include a yoke including a second connection insert configured to receive a second fastener. The yoke may attach to the arm via the second fastener. The connection member may further include a pivotal pin configured to axially attach the bracket with the yoke and a device to attach a fairing to the blade.