$20 Lenz2 VAWT destruction test

Construction tutorial at: http://solarflower.org/tutorial.php?l...

This is first test of the vertical axis wind turbine, built for about NZ$20 using only a bike wheel, offset printing plates, nuts bolts and rivets.
The test was mainly to see what kind of winds it would take unloaded, and where would need strengthening. I also measured revs and tip speed ratio.
Overall it held together very well, mounted on the back of the car (slightly insane, but effective) at up to 80 km/h, the only point that seems to have failed is the area where the flat of the vane meets the curve, as shown at the end of the video. This is due to the flat flapping and flexing, which is what I'll now fix with the next build.
I'll be getting more plates this week, rebuild with an improved design, and retest (hopefully over 100 km/h).
Stay tuned.

$20 Lenz2 VAWT destruction test diya tailors
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Science & Technology	Upload TimePublished on 29 Jun 2013

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