Here is a fun project that recycles plastic soda bottles and turns them into cool decorative wind turbines!
Step 1: Get a Plastic 2-3 Liter Soda Bottle
Start with a 2 or 3 Liter plastic soda bottle. Wash out the sticky stuff. Then let dry.
Step 2: Mark Out the Design
Take a fine point black felt permanent marker and lay out your fin design. I did this without measuring anything. The size of each fin is up to you. The bigger the fin is the less work . So you choose. You can cut the fins long or short. I chose two rows separated by a center band of plastic. You also can make one row facing left and one row facing right. Or both facing the same way. Experiment and see which turns faster.
Step 3: Get a Very Sharp Exacto Knife and Cut the Fins.
I chose a curved blade after experimenting with different blades. It worked best on the flexible side of the plastic bottle. Cut only the sides of the turbine fins and the long side of the topless pyramid shape. See pics. This very tedious work. Do not cut or push the blade, gently pierce the plastic and draw the blade easily along the lines. BEWARE- these blades can slip and cut deeply. You can wear thick leather gloves if you like. Very pointy sharp scizzors might work but I have not tried any yet. This is not for children to do! Please do not try this unless you have the skills and hand dexterity to use these razor blade type craft knives. The bottles bend, move, and crackle. Very tricky to cut. So BEWARE of this!!!
Step 4: Fins From the End View
Step 5: Bend the Fins Out to Catch the Wind
After cutting out the fins, bend each one so it stands out from the bottle. This will catch more wind and spin the bottle very fast.
Step 6: Fins From Top View
Step 7: Drill a Hole in the Cap
Get a real small drill bit and drill a tiny hole in the cap center. Then take some fishing string and pass it through the cap. Invert the cap and tie a knot or two on the inside of the cap. Test to see if the cap spins freely. I use 25 lb. test fishing string but any size is OK. Cut about 12-18 inches off the spool of string.
Step 8: Dremel Tool & Tiny Bit
Step 9: Paint or Decorate It
You can paint your wind turbine or glue on sparkles or leave it plain. Your choice. I chose bright florescent orange and green so it would stand out.
Step 10: Hang Your Wind Turbine Outside
Screw on the cap and hang your wind turbine where the wind will catch it. Also where you can see it outside a window and enjoy the spinning action. Have fun, be safe. Enjoy. Triumphman