Build a real working turbine from recycled CD's!
This Tesla CD Turbine is based on the Tesla turbine, which was invented by Nikola Tesla in the early 1900's.
Tesla's pumps and motors were unique in that they only used discs, and took advantage of the boundary layer effect. His smallest designs were over 100 horsepower.
This Instructable is an introduction to my recently developed Tesla CD Turbine, which is made from CD's, CD spindle, pipe fittings and glue. This easy beginners version runs on garden hose pressure and is fun for demonstration or experimentation purposes. This same CD Turbine can also be powerful, versatile, useful and dangerous when used with compressed air pressure.
The basic model Tesla CD Turbine shows how the boundary layer idea works to deliver power. The CD Turbine has unique design features such as no moving shaft, no bearings, no seals and uses recycled CD's. It is so frictionless that it can go over 500 rpm just by blowing into it hard!
The advanced model has many cool features, such as the use of neodymium magnets to separate the CD's with the correct gap and a Magnetic Coupler to attach implements, and much more.
My next CD Turbine Instructable shows how to make a Magnetic Disc Pack and Magnetic Coupler for more advanced CD Turbine experimentation. I will develop magnetically-coupled implements that will range from the practical (Generator, SaladSpinner, etc.) to the bizarre ( Skilsaw Blade , Punch Bowl Stirrer, etc).
However, please be forewarned that this turbine on air pressure is not really a kid's toy or particularly safe to operate.
On water pressure it is safe from explosion, maxing out at about 1000 rpm.
The turbine can be run on either water and air pressure without modification. Although this simple turbine can be safely run at one or two thousand rpm on water hose pressure, it can turn tens of thousands of rpm on air pressure.
I must warn you running this turbine on air pressure could be enough to explode the CD's in the turbine and cause injury. To prevent this, regulate the air supply to lower the psi and use a digital tachometer like this one.
If this unit is run on air pressure, precautions must be taken such as protective gear (heavy leather gloves, face shield, helmet, leather jacket & pants, cup(?), etc.), as well as being behind a protective barrier. If the CD Turbine comes apart at 25,000 rpm, sharp CD parts will be impelled literally at the speed of a gun. You are forewarned!
I will be discussing ways to avoid any possible unpleasantness as we go along in these Instructables, but for now...let's have some FUN!
Step 1: Materials and Tools
1.) 10 (or more) recycled CD's (no labels & no cracks)
2.) CD Spindle with Cover (recycled)
3.) Orbit WaterMaster Extension Nozzle Model 91129 ( Home Depot, $5.95, or try a $1.80 Nozzle from Holland GreenHouse products.)
4.) 1-1/2 inch of plastic straw or tube to fit small end of Nozzle above
5.) Garden Hose Shut-off Valve ($3.50)
6.) 2 feet or more of 3/4 inch PVC plastic pipe ($.50?)
7.) ABS to PVC cement
8.) PVC Pipe Primer
9.) Methylene Chloride (Plastics Shop), for welding polycarbonate CD Discs to each other.
10.) Hot-glue sticks...less than a half dozen
Dremel Tool (optional)
Notes: 1.) More than 10 CD's may be used for taller CD spindles.
2.) If you can't find the "Orbit Watermaster Nozzle", you could use any plastic or brass water nozzle, such as the Holland GreenHouse brand Plastic or Brass Power Nozzle. Or simply use a combination of pipe fittings down to a 1/8 inch nozzle, and adapt with hot-glue to the CD Cover.