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We all have to be aware of wasting energy,and this Instructable was forwarded to show you how to save energy by using throw-away plastic bottles. There is a lot of raw plastic materials being not recycled. It just goes into a garbage pile . I have used plastic drink bottles for whirligigs and also old CD discs which are also re-cyclable.The resulting devices I use in the garden or my trees as ornaments that twist and rotate in the wind.

THIS INSTRUCTABLE WILL BE ENTERED IN THE US OF EFFICIENCY CONTEST. So vote.

Step 1: parts and layout

1-A couple of old cd discs can be used or any round piece of plastic about 1/32 thick.
Beverage bottles- I used a water bottle about 2 inches diameter and 8 inches long after cutting off the top . A scissors can easily cut down the length .I used a strong shears for cutting the bottom.
Best string is a 1mm dia.plastic cord I found in an craft store for under a dollar. It should be stretchable. Stretchable string gives a counter-rotation after the wind winds -up the string and stops.
Glue can be hotmelt but I used Goop Glue. It is slow in cure [one hour] but very strong. I also use fish line illustrated here.

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I got half way with one of these and gave up, so congrats on the finished job!<br/>They work a bit better with some over-lap in the middle, like <strong>Kiteman</strong> said Google for &quot;savonius turbine&quot; if you're interested.<br/><br/>L<br/>
thanks L- I believe that would be an improvement as it would be more solid construction. My spot gluing seems to work in a 20mph wind storm tho for at least 5 months..
added history;;<br>Its been over 2 years now that my original model was exposed to the weather.<br>Its still rotating .The swivel [used by fishermen] is still functioning.
I should have maybe looked at plastic and glue, rather than metal-cans and screws... L
Kinda interesting.... wonder if you could mount a small DC motor on this and make a small novelty wind powered generator.
Yes, you could - google for <em>savonius turbine</em> or for <em>picoturbine</em>.<br/>
<strong>vertically mounted plastic pop bottles work very good as they rotate&nbsp; in wind of any direction horizontally. I am working on adding a motor generator. will publish&nbsp; in Dec.</strong><br />
woops- havnot&nbsp; finished the new mg set addition- working on recycling&nbsp; those ubiquitus&nbsp; plastic bottles ... <br />
I am working on this. I saw the savonius turbine Ins, they feel that there should be more area to the their vane construction. I am going to do this by tandeming one set of 3 above the first one on one axis rod. Or use larger diameter bottles too. will publish if it works with a small VCR motor i have.
I might enter the Led contest.. Let the motor-generator produce 5 to 10 milliamps at 3 to 5 volts and presto my LED would light up<sub>,</sub><br/>
clever! I like it as a use for an old plastic bottle

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Bio: A retired electronics engineer -motorola. delveing into new craft ideas and contest entries.
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