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A vertical axis wind turbine including a wind turbine which depends on a vortex down wind of the turbine enhancing the air flow past the vertical turbine. The vertical axis wind turbine structure includes a rectangular shaped turbine with four orbiting panels mounted to rotate at the top of a pyrami

A vertical axis wind turbine including a wind turbine which depends on a vortex down wind of the turbine enhancing the air flow past the vertical turbine. The vertical axis wind turbine structure includes a rectangular shaped turbine with four orbiting panels mounted to rotate at the top of a pyramidal base structure which generates a substantially horizontal vortex immediately down wind of the turbine, thus enhancing the air flow past the turbine.

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1. A vertical axis wind turbine structure comprising in combination:(a) a substantially square pyramidal base structure, having an apex and a base surface defining a substantially horizontal plane;(b) a substantially triangular face joined to each of the four edges of the base surface and to the adj

1. A vertical axis wind turbine structure comprising in combination:(a) a substantially square pyramidal base structure, having an apex and a base surface defining a substantially horizontal plane;(b) a substantially triangular face joined to each of the four edges of the base surface and to the adjacent triangular faces;(c) a turbine structure constructed and arranged to rotate about a vertical axis; and(d) means to utilise the rotation of the turbine to provide useful work;wherein:(i) the four edges of the base surface are the same length;(ii) the four triangular faces are inclined at the same included angle to the base surface;(iii) the included angle between each of the four triangular faces and the base surface is from 45° to 55°;(iv) the turbine structure extends upwardly from the apex of the pyramid;(v) the turbine contains four elongate wind panels formed in two parts, each of which is attached along a first elongate edge to the turbine axis and along a second elongate edge to the second part; and(vi) the two parts of each elongate wind panel are joined into an L-shaped cross-section, in which the two arms are of substantially the same width. 2. A vertical axis wind turbine structure according to claim 1 wherein the included angle between each of the four triangular faces and the base surface is about 50°. 3. A vertical axis wind turbine structure according to claim 2 wherein the included angle between each of the four triangular faces and the base surface is from 49°30′ to 52°30′. 4. A vertical axis wind turbine structure according to claim 1 wherein the four triangular faces are flat. 5. A vertical axis wind turbine structure according to claim 1 wherein each of the four triangular faces is creased inwardly on a line from the pyramid apex to the midpoint of the base surface edge, and the crease angle is from about 1° to about 2° is about 1°30′. 6. A vertical axis wind turbine structure according to claim 1 wherein each of the four triangular faces is creased inwardly on a line from the pyramid apex to the midpoint of the base surface edge, and the crease angle is about 1°30′.