Step 4: Assembly and Test

Okay now insert your axle through the center holes of both wheels and your ready to attach the fan blades.

Notice I cleverly used a box to hold the windmill during assembly. This worked out extremely well and I highly recommend a similar arrangement.

In this version the fan blades are attached to the wheels with tape. I found it useful to attach a tape tab first ( see picture ) and then attach it to the wheel. Align the tips of the fan blade along the 40 degree line facing outward ( see picture ).

Once a blade has been attached properly at one line it up so that its straight and attach it to the opposite wheel. I tried both ways and found that doing both ends at once seemed to be easiest.

Attach the blades on opposite sides and the weight will balance out.

When you're done you'll have a lovely 5 blade vertical axis windmill. This design can be stabilized and scaled up for any number of hobby or mechanical projects.
To get your labels off fill the bottle with very hot water. I heat enough water (not to a boil) on the stove to fill two bottles. Wearing oven mitts, and using a funnel I fill the bottles in the sink. If the water is hot enough, it will almost instantly melt the label adhesive. referenced from (http://www.flickr.com/photos/greenscaper/2519983658/in/set-72157604735985648)<br><br>I also found a cool hot knife instructable to save us from laboriously cutting soda bottles with scissors. https://www.instructables.com/id/A-Hot-Knife-cuts-plastic-rope-opens-welded-pla/<br><br>I can't wait to try this out!!! Love it!
Excellent, I have featured your comment.
I used cd's water line 3/4 plastic superglue and pan washers that model is bigger but try aluminum for the rounds and pvc for the vanes. Or possible rout a grove in some polystyrene and use adhesives to cunstruct drill to balance and paint to get it uniform. think charge 6 volt conventional batteries.RAPID PROTOTYPE LOVES SAVANIOUS WIND TURBINES
I love this!!!&nbsp;&nbsp; :D
I think you have "protractor" and "compass" mixed up. The protractor is the semi circle marked out in degrees, while the compass is the tool for drawing circles.
My God you're right. I didn't even really think about it.
forgot to add: Good 'ible, looks like a great platform for assessing torque and sustained watt values for larger scale VAWT, and cheap to make. Thanks!
Would this work in reverse as a fan, with an enclosure like a squirrel cage (centrifugal) fan ?
Absolutely. However it will be less efficient than a traditional type fan since it isn't as focused. Adding a squirrel cage would overcome this I think.

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