a modular , electricity generating apparatus comprises an elongate , central member comprising a first end and a second end ; at least one foil disposed about the central member in fluid interacting relation thereto ; the first end and the second end dimensioned and configured to be connected to a connecting node ; and , the elongate central member at least partially comprised of an electrically conductive material and configured to conduct electrical electricity from at least one of the connecting nodes to the other of the connecting nodes .