Suggest you remove the email address from first post.
I take the challenge.
Just wondered why the flat end on the part follower.
Did some search and find this website:
There is a WindSculpture.zip for download, inside 4 folders deep you will find 2 pdf files. There you can see the assembly.
If you want to work it out for yourself, don't look into the pdfs.
But meme and roerich are miles past the result.
Have still some work to do, modeling it parametric in Part Design Workbench.