I want to thank everyone - over 100 commenters on my original project - for their input and knowledge as well as their questions that lead me further in my pursuit. Thanks Guys!
I will try to take an approach on this project where I will give steps first and explanations of why following. You will also be able to download, as I did on the original project, a pdf with the whole process. Most of the document is the original with additional information that was not in the original. http://www.spinpower.org/DIY/My_Savonius_DIY.php (This is php to force the download instead of trying to open in your browser.) My website is http://www.spinpower.org if that wasnt clear above. I also have the following website name pointed to the same place http://www.smart-turbine.com .
Step 1: Materials Tools and Safety
Specialty Item prices are what I paid and may change
Magnet wire – 780 feet of 24 AWG or twelve 65 foot spools of 24 AWG $22
16 Neodymium magnets - 1”x2”x ½” (I had to order 24 for the $150 price) $150
Rectifiers (one full bridge for each phase – I recommend 3) $6 ea
Plexiglass – ¼” thick sheet about 25”x7” $Free
Scrap at city or school maintenance base
Skate Bearings (you only need 2) $3 ea
Home Improvement Stores
Galvanized sheet metal squares 2”x2.5”x about 18 or 20 gage
Glue – not cyanoacrylate or any others with harsh solvents, but must be
very strong and weather resistant I used Gorilla Glue and Liquid Nails
small projects clear indoor outdoor as well as Liquid nails in a caulk gun
Thread Lock (not the permanent variety, but high strength for sure)
Extension cord – sacrificed for delivering power from turbine to charging location
Screws – must be weather resistant (I use the 2” plated drywall screws, they are easy)
Large washers – used with the above screws for attaching coils to VAWT platform
Pressure treated wood for base of structure (32”x32” area for base)
Rounds (24” diameter, 2 for a single tier or 3 for a two tier)
Stove Pipe (2x 6” diameter for a single tier or 4 for a two tier all 36” length)
Pipe Nipples (3x 36” for single tier or 5 for a two tier)
Pipe Nipples (2x 3” for top extension)
Pipe Couplers (2 for single tier or 4 for two tier)
Pipe Elbows (2)
Bolts (to fit in bearing about 3 or 4 inches long, get several but you only need 2)
Nuts (for bolts, get at least 6 to allow for adjustments – its cheaper than a second trip to the store)
Washers (Fender to fit over the bolts, get at least 6)
Weather Treatment – Polyurethane or outdoor grade paint
Ball Bearing (you may find that buying a childs magnet building kit at a Target is cheapest, you only need one, size not critical but about 1/4” diameter or bigger is good)
Guy Wires and accessories (you will have to tie this to the ground so it doesn't blow over or wiggle)
Separate from the power generator is the rest of the power plant:
Batteries to store and buffer power
Charge Controller for batteries
Inverter to make battery power 110 VAC
Transfer Switch to run Inverter power to a house
Router with narrow plunge bit to cut a channel or similar rotary cutting tool
Hand Planer or Belt Sander to true up the rounds
Drill for driving screws and the occasional hole
Drill bits, standard and one paddle style that is the diameter of your bearing
Hole Saw (this is to make a jig, size not critical but should be 2” or bigger)
Soldering Iron, Gun or Torch and solder
Welder - optional for heavy duty build which also requires a length of steel and 1/4x20 screws, a tap to match and some steel squares, about $15 of additional materials around here.
Snips for cutting galvanize squares
Strap or Rope to tie unit together while glue dries (you could weight it down)
Clamp not necessary but will make some things easier
Compass (to find center of rounds)
Markers (red and black preferred)
T-Square or other Straight Edge
Hammer (you never know with this one, something may need persuading)
Vise Grips (for steel upgrade, used to hold tap if you don't have a tap and die set)
This is a DIY project, as always, you take responsibility for your choices and actions. This is presented for you to learn from and potentially mimic in order to produce a working electricity generating wind turbine. Also, the power generated is dangerous. Please maintain a high level of respect for this machine. My current revision will directly light a 60 watt light bulb in a 6MPH gust of ... Oh wait, thats not so much a gust as it is a breeze. The power output is scary. Treat it like power from a wall outlet.
Always wear safety glasses, ear protection and take all precautions when working with tools and raw materials.
Step 2: What to do first...
I used plywood for this revision, the thick flooring grade stuff. One 4x8 sheet was more than enough. Using my Rotozip and a plexiglass guide that I made, I was able to make very nice and "true" circles.
Step 3: After the circles... Step 2
Step 4: Step 3 ... Repeat Step 2 .. but not really
Step 5: Step 4 .. Dry fit
If the dry fit is good and you are able to apply the top and "hip" circles at the same time, you will want to verify the orientation of the bottom and "hip" next. If all is good and you have all of your orientations correct, it's time to glue.
Step 6: Step 5 Glue ... If there is any doubt, repeat step 4
Step 7: Step 6 ... Glue the second section
Step 8: Step 7 ... Reinforcements
Step 9: Step 8 ... Look at what you have done :)
Step 10: Step 9 ... if you havent painted, go back to 8 and paint
Caution: These magnets are tough. Be careful.
Mark the magnets with red and black or something so you know which way is which. It doesn't matter which is North or South, so I will refer to them as A and B. Just mark them while they are stacked so they are consistent as you glue them. Attach an "A" at every other measure mark and let them dry for no less than 24 hours. Next wearing thick gloves, attach a "B" at every remaining measure mark. Extra caution for this step, the blood blister I got through my leather work gloves was very painful. Wait another 24 hours and add a bead of construction adhesive along the edge of each magnet. Wait another 24 hours and add paint to the magnets. Seal this stuff good.
Step 11: Step 10 ... a winding jig
Wrap with electrical tape immediately and set aside. Repeat the coil making process 16 times with about 50 to 65 feet of coil depending on AWG of 24 or 26.
Step 12: Make 16 coil mounts ...
Step 13: Be creative and build a frame
Step 14: Connecting the wire coils ...
Edge of coil A to edge of coil B - Center of coil B to center of coil C - Edge of coil C to edge of coil D - Center of coil D to center of coil E, etc...
Leave only the very first and very last wire open or un-connected, this will be where you hook up a diode or rectifier.
NOTE: DO NOT MAKE THESE CONNECTIONS WHILE THE ROTOR IS SPINNING, THERE IS POTENTIAL FOR ELECTRIC SHOCK.