.  Hill Country Research Innovations in Telecommunication and Automation     Wind turbine

This vertical axis windmill, the Heinrichmühle, is a very unusual design.  It consists of three wings with three sails on each wing.  The sails are made of parachute fabric.  The geometries of the wings change at every phase of the revolution cycle thus optimizing the wind interaction.

The turbine has a height of 7 meters (~21').

A 1.5 kW generator is attached at the bottom via a gearless transmission.  Unlike with horizontal axis wind turbines, which have the generator at an uncomfortable altitude, electrical components are easily accessible here. The generator produces DC, which charges marine batteries which in turn feed the DC/AC inverter.

Eight guy wires stabilize the tower.  They are part of the rotating structure.  It is mounted on two hinged 6 mm (1/4'') steel plates to allows easy lowering of the tower for maintenance.
 

Product is still being optimized and not for sale yet.