Abstract: A system for improving performance of an internal combustion engine is provided. The system may include an exhaust pipe and a leading edge member attached at one end of the exhaust pipe. In one aspect, the leading edge member may be attached to a windward side of the exhaust pipe to define a drawtube arranged to lower a pressure at the end of the exhaust pipe. A device for lowering a pressure at the end of a vehicular exhaust pipe to improve performance of an internal combustion engine may also be provided. The device may include a substantially planar leading edge member and a sleeve configured to be secured to a vehicular exhaust pipe. A bottom edge of the leading edge member may be attached to the sleeve.

Abstract: A system for converting an airflow into mechanical or electrical energy and dimensioned to be attachable to a structure. The system includes a leading edge member, a pair of drawtube arrays, and an energy conversion device located between the pair of drawtube arrays and configured to convert an airflow through the channel into mechanical or electrical energy.

Abstract: An apparatus for converting an airflow into mechanical or electrical energy is provided. The apparatus may include a hollow column defining a longitudinal axis and a sail member coupled to the hollow column. The sail member may be configured to be exposed to the airflow. The sail member may define at least one slot positioned proximate the hollow column and extending substantially parallel to the longitudinal axis. A plurality of drawtubes may be disposed within the at least one slot. Each drawtube may include a leading edge member positioned adjacent to an opening at a first end of a tubular member. The tubular member may be fluidly coupled to the hollow column. An energy conversion device may be configured to convert air drawn through the hollow column into mechanical or electrical energy.

Abstract: A system for converting an airflow into mechanical or electrical energy is provided. The system may include a drawtube. The drawtube may include a tubular member defining a longitudinal axis and having a first opening and a second opening. The drawtube may include a first member positioned adjacent to the first opening on a first side of the tubular member. The drawtube may include a second member positioned adjacent to the second opening on a second side of the tubular member, wherein the longitudinal axis of the drawtube is disposed at an angle relative to a direction of the airflow. An energy conversion device may be coupled to the drawtube and configured to convert the airflow into mechanical or electrical energy. A plurality of the drawtubes may be assembled in an array.

Abstract: A system for converting an airflow into mechanical or electrical energy. The system may include a leading edge member, and a collector positioned adjacent to the leading edge member. The collector may have a pair of flexible surfaces each covering an opening within a center portion of the collector.

Abstract: A system for converting an airflow into mechanical or electrical energy, which includes a tubular member having a first opening and a second opening, a leading edge member positioned adjacent to one of the first and second openings, and a raised edge along each longitudinal edge of the leading edge member.

Abstract: A wind powered variable area exit aperture electric generating system having configurable, adjustable duct side walls by which means the ratio between the intake cross-sectional aperture area and the exhaust cross-sectional aperture area may be varied for maximum air molecule flow through the duct, leading to ideal maximum electrical output for any given air mass input. The planar characteristic and angular dispersion of the mutually leading edge coupled extended flaps, and the regular square interior housing result in complementary internal vortices developed at the trailing edge of the planar architectural surfaces.