In the last 15 years I have made several models of this wind turbine. On each model I tested some other circuits, or variants of assemblies. A list of shots can be seen here.
I also wrote a book about this wind turbine in which, among other things, the principle of operation of individual assemblies is described.
This last model I made with the aim of making a machine that can be mounted on ships. To that end, I extended the wings three times compared to the previous model. This gives three times the usable area, while maintaining the height of the rotor, so that too high a wind turbine would not capsize the ship.
With the sails spread, this turbine starts operating at a wind of 1.5 meters per second. He also works on the storm with the sail assembled.
High efficiency is ensured thanks to the optimal placement of the sails towards the wind. When turning the sails with a smaller part of the movement it uses the force of pushing the wind, like a savonius rotor, and with a larger part of the movement it uses the buoyancy of the wind as a darius rotor. Thanks to its small height and large width, it can be mounted on ships. An electric generator can be placed at the bottom of the ship. Simple production technology. Easy installation and servicing. Easy transport of parts. Simple and inexpensive stand. It works quietly. Thanks to its slow rotation, it is not dangerous for birds.
To make this model, you first need to get one low-speed generator that runs at 50 rpm, along with a voltage converter. I ordered my copy from China.
The power of the generator depends on the energy needs and the windiness of the terrain where the turbine will be installed. Wind power depends on the third power potential of the wind, so it is necessary to install a generator that will work as many working hours as possible. This is important in order to invest as little as possible in batteries. A smaller generator achieves more operating hours, while a larger one produces more power but achieves fewer operating hours. The optimal size depends on the windiness at the microlocation.
In addition to the generator, it is necessary to buy three small differentials with a gear ratio of ½. I got them from Italy. It is necessary to order the production of one three-way differential 1 / 1x3.
It is also necessary to purchase 3 small servo motors for collecting and spreading sails.
The dimensions of all other parts need to be adjusted to the size of the generator and the purchased differentials. If I were to do this last model again now I would take all the pipes a little wider. The hardest part for me was getting four pairs of sliding brushes with a brush housing, for transmitting electricity from the battery to the servo motor for collecting and spreading the sails. Because of this, I had to make the brush case from a soft material that is used by children to model figurines that harden after a few hours. Everything else can be done in each garage with a grinder and a welding machine.