My 1st and only attempt was back in high school, when I had built one using wooden blades and turning a bicycle generator.
So after getting hooked on Instructables .com and viewing other members wind mill projects, I've been on the lookout for DC motors and thinking of some ideas.
Then one night it hit me.... I had an old cordless drill that I was no longer using.
So after finding and disassembling the drill, is when the brainstorming began :)
Through the months I've added several steps about the 2 different wind generators and the modifications made to both of them as problems arose.
Step 1: Step(s) after intro.....
blades will have to spin in a clockwise direction to keep the chuck tight.
I cut in half a section of pipe that is slightly larger than the outside diameter of the friction bearings that are between the hub and the chuck. I then used an water hose
repair connector to hold the cut pipe halves around the friction bearings which also will provide support.
I attached the assembly to a plastic peg board.
After getting the unit assemble/attached to the peg board, it fit perfectly inside an 10 oz coffee can
After attaching the blades and hooking up a voltage meter, I took it outside in a very light wind.
The completed unit spins freely and the small DC motor does create a small amount of DC current.
I can/could install a bigger motor using the "chuck".
The day I mounted it atop a pole, a thunderstorm came up with high winds and the wind turbine handle it just fine.
Step 3: Up and going
With the turbine being painted in a camo scene, it almost isn't noticeable against the tree line.
I live in a low wind area, but it does spin in very light breezes.
Step 4: Prep work for the larger motor
The larger motor fits perfectly into the 10.5 oz coffee can. I cut the bottom off of the can and shoved thick packing foam between the motor and can, then put the plastic top on the bottom of the can
I put silicone around the top of the can and the front plate of the motor.
This motor being an high RPM motor, I'm afraid that it won't produce much more power.
But for $18 and $7 shipping, it's worth a try.
This motor was a flop!
It worked great as for fitting in the can, mounting to the mill and the chuck / blade assembly. But I was lucky to get .5 volts in a steady wind.
Step 5: Larger motor up and spinning
My son and I got the larger motor up and spinning sooner than I had planned.
Like I had mentioned in the previous step, this motor put out very little voltage.
Step 6: On the farm
After 6 weeks of watching it spin and weather through high winds from thunderstorms, I figured it was time to put the generator to use.
I have a solar LED lighting system at my parents farm house.
So I drove a metal fence post into the ground and then attached the windmill mast to the post.
Ran a old phone cord about 8' high from the mast to their front porch.
I soldered a blocking diode to a lead and then hooked the leads straight to one of the 12 volt dry cell batteries.
With the small amount of power that the motor/generator puts out, I figured it was OK to bypass the charge controller.
I shoved lots of extra wire back into the mast, in hopes that it would take a long time before the wire would get too twisted from turning into the wind(s).
Step 7: Test model # 2
Here are images to some ideas that I'm working on for my 2nd test model.
The chuck is from an old Dewalt (R) cordless drill.
I used 2 blocks of wood to secure the motor/generator inside the "U" bolt.
The drill chuck's bearing is resting in a block of wood that has a "key hole" drilled through it.
The assembled unit is then mounted to the board using the "U" bolt that is holding the motor.
The 6 blades are made from 3" PVC pipe, 18" long, mounted on a small metal disk.
They spin fast!
Covered the assembly with 3" PVC pipe and end caps.
Bolted a floor flange to the bottom of the board with an 1/2" X 10" pipe screwed into the flange.
Then the 1/2" pipe was slide into a 1" X 10' conduit.
The fin is made from a piece of scrap metal.
It almost hit 6 volts during a gust on a fairly breezy day
I took this unit and hooked it up to the charge controller on the solar set up at my mom and dad house.
Step 8: Geared
This unit is using the chuck and geared hub from #1, just reversed.
The gear on the motor matched the gearing from the chuck/hub.
I mounted the motor and chuck/hub to a thin metal plate, then bolted the plate to the windmill.
I used 4" PVC pipe and caps to enclose the motor and chuck/hub.
I'll experiment with blade designs for both speed and torque.
I installed 4 larger blades made from 4" x 2' PVC pipe.
Step 9: Furling
After experiencing some minor damage after some recent high winds.
I figured I'd experiment with some type of furling mechanism.
This is about the best I could come up using only parts that I had on hand.
I also added a 2nd tail-fin due to the front of the wind generator being extended out several more inches.
The tension to the springs is adjusted by raising or lowing the nuts on the bolts.
The springs also acts as stopping posts for when it is furled back.
The below video is about the furling mechanism at work in approximately 25-30 mph wind gusts. For over 24 hours the wind generator was hit repeatability by sudden high gust of winds from different directions.
Proud to say that it actually made it through the night :)