Here’s my first venture into writing an instructable. I’m not creating much new here, just giving people a cheap first step into making Savonius styled wind turbines and trying out some new ideas. Most of the materials can be found right in your own garage if yours is as filled with junk like mine.
Step 1: Getting Started
Parts to buy or have laying around:
2 Glass sliding door wheels– purchased at Menard’s for about $3
6 Magnets – need to be N and S poled. Purchased mine cheap (about $.60 ea. from Menard’s) Rare
Earth magnets would have been better but I’m cheap.
¼” threaded rod about 24-36” long (depending on your soup can height)
¼” hardware including washers, lock washers and nuts
Clear silicone sealant or epoxy or resin or glue, etc.
Probably have laying around:
2 same sized empty soup cans
Rulers, tape measures etc.
Jig saw, scroll saw or band saw
Drill or drill press
1/4" –3/8” plywood X 3 disks– Thicker would be fine except very heavy. Thinner would be fine except for the bottom layer. Most soup cans will have a finished turbine diameter of less than 8 inches.
Misc. screws, string and other scrap wood for framing and other last minute MacGuyvering.
Glues of various sorts.
Step 1 – Soup is Served
Eat some soup! Just about any sized can will do. The bigger the better. The cans I used were from some large tomato soup. The were about 4” diameter and maybe 6.5” tall. Measure yours. It’s best if it doesn’t have the rounded bottom as it makes it hard to cut off. With a regular bottom, you should be able to just use the can opener on the bottom. Once it’s all cleaned out, place it on a blank sheet of paper. Trace a circle around the base and place soup can to the side. Fold resulting circle in half and mark where the fold line meets the edge of the circle.
Place soup can back over traced circle and mark where you marked the half folds. It’s easiest if the soup can already has a line on it from the manufacture (seam line). Mark top and bottom and use a ruler to connect the marks. Use tin snips to cut can in half. Be careful since sheet metal edges are razor sharp. Best to use leather gloves for this part.
You should now have two soup cans cut in half now. I chose to run the grinder on the edges to make them slightly less sharp but that is optional. You can also tape them by folding some duct tape over the edges. As mentioned before, sheet metal is very sharp and should be handled with care and leather gloves.