Tubercles

[freebeard]

Whales For Wind Power - The Samara Turbine With Tubercles

The mad inventor shows three generations of windmill blades, the most recent the Samara turbine is based on an organic airfoil. The tubercles come from whales' hydrodynamics.

The test is rudimentary, but he rarely goes beyond seeing of it will light up an LED.

This solution represents a fabrication problem once it grows beyond 3D a printer's build volume. Auto body panel beating tools seem appropriate.
________________

At this point, I'm convinced that a properly configured house would get it's heat and air conditioning from outer space, and it's electricity from wind power.

[kach22i]

I'll finish watching the video later.

Back in 2007 I did some research on the topic, sadly most of the links have vanished - never happened back when we had books, we just had to return them to the library.

A Whale of an Idea
https://www.boatdesign.net/threads/a...an-idea.17382/

PDF link from that thread that includes Mr. Fish (Dr. Fish?):
https://www.boatdesign.net/threads/a...an-idea.17382/

There was an orange colored hovercraft fan blade (w/tubercles for noise reduction) that was supposed to hit the market back then, it never materialized.

EDIT:

Article on modifying a standard airfoil.

https://www.researchgate.net/figure/...fig1_236679345

Seems to be a related video on this:

https://www.youtube.com/watch?v=h8a9HUGpzuE

[freebeard]

Closed Captioning didn't understand him either, and just gave up.

[freebeard]

So I sat through it. How many ways is he wrong?

For all his struggles with the SolidWorks interface all he produced was a corrugated airfoil, not tubercles.

Once he has the two airfoils he could have pasted one three times and then pasted the other three times. When he closed the curve he should have joined the two arcs.

I don't like the UI -- that snap line that follows you back to the menu.

What would I do? I'd find an SVG of the airfoil, Import into Blender, Extrude {x8), Subdivide, and select the front half of the airfoil. Then apply a Wave modifier. That would keep the back half of the airfoil correct. Five steps to real tubercles.

edit:
I looked at the Wave modifier. It is wild and unruly beast. But I see that Blender has NURBS as well as Bezier curves. That might be the best approach.

https://www.makeuseof.com › nurbs-curves-3d-modeling-blender-tutorial
How to Use NURBS Curves in 3D Modeling: A Blender Tutorial - MUO
Jan 29, 2022How to Convert NURBS to Mesh in Blender. In order to create concrete geometry out of separate NURBS curves, we'll first need to finalize the shape and convert it into a mesh. This method will work for any type of NURBS object in Blender. To convert NURBS to polygons in Object Mode,