Modelling of Archimedean-Spiral type of Wind Turbine, in Moment of Inspiration.

This style of Wind Turbine seems to have many advantages, and is being sold commercially. There are numerous links, but they give very sparse information on how to create the turbine. They just say that it was modeled in Solidworks.

The following Link is to a Solidworks video, which describes the modelling, and is helpful, but the commands in Moi differ:
https://www.youtube.com/watch?v=UoWLdbMDTlQ

The helper curves:
1. (Blade Radius) is 75 cm, along the z-axis.

2. (Tapered Helix & Sweep Rail 1) is simply a tapered helix of length 75 cm, with radius from 75 cm down to 0 cm, in the positive x-axis direction. If viewed in the Right view, as if it were 2D flat, it appears to be an Archimedean spiral. (This can be confirmed by using the Archimedean spiral script.) The 3D curve is the Sweep Rail #1, for surfacing the turbine blade.

3. (Sweep Profile curve) is a line, at the "opening angle" of 60 degrees, and is also the Sweep Profile for creating the turbine blade.

4. (Sweep Rail 2) is a line, along the negative x-axis, and is the second Sweep Rail, for creating the turbine blade.
*** EDIT: Sweep Rail 2 should be the entire line composed of joined Sweep Rail 2 with "Not a Sweep Rain" line.***

5. (Not a Sweep Rail) is a line, along the positive x-axis, and is *** NOT *** used as a Sweep Rail for creating the turbine blade. (If this line segment is included as part of the second sweep rail, the result does not look right.)

6. (Center Pipe) circle shows where the Pipe2 script can be used to create the center (support) pipe. The pipe diameters are 5 cm and 6 cm, and can be easily created after the turbine blade is created, along the +x and -x axis lines. (The lines should probably be combined for this step.)

7. The turbine blade surface is created with a simple sweep of the Sweep Profile curve, with Sweep Rail 1, and Sweep Rail 2. The result looks good visually.

8. After the turbine blade is swept, Offset & Shell commands, will thicken the blade, at 1 cm, to a solid. The blade may then be trimmed with the center pipe, with Boolean Dif.

9. Circular array (3), will create the other 2 blades. Boolean union may then be applied to the 3 blades, and the center pipe.

The purpose of the above description is to create the turbine blade. Design modifications can be made, and additional engineering done, to create a home made wind turbine... 3d printing can be done.

- Brian