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.
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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.