Re: [TeslaTurbine] my first
- I made my first runner this week. I made it out of CDs. Spacers between
disks are hubs cut from other CDs. I mounted a piece of 1/2" cpvc pipe in a
drill press and sanded it down so it would fit inside the CD center. That
was the first bad idea. To mount the cpvc in the chuck I had to put a dowel
rod in the cpvc, which didn't fit right. So I had to mount the dowel rod in
the drill press and sand it down a little. Then the cpvc slipped onto the
dowel rod so I could sand down the cpvc. I had some trouble with wobble but
the cpvc seemed to do well enough. I cut pvc schedule 40 to press the
runner layers together, which is a bad idea because the cpvc was sanded down
too small to make a tight fit with the pvc. And the pvc cut wasn't square.
I glued the disk pack to the cpvc with super glue (CA) and the pvc pressed
onto the ends glued with super glue also. All seemed to be pretty usable so
I mounted the dowel rod in the drill press in order to cut it down for the
ID on the bearings. Bad idea. The dowel was too soft and wobled. So I
have a wobly, unusable, piece of junk, learned much from it, disk pack on my
desk for discussion with my coworkers.
I know whats already published and all the examples given from this list. I
have limited resources and limited funding so I'm having to make do. I
really believe I can build a runner out of CDs so I'll keep going.
#1 Gotta have a lathe to cut the shaft. I have a friend with one so I'll be
going over there soon.
#2 If you build it, you will know more than all you can read about it.
I plan on using roller blade ball bearings. They won't likely last long.
When blowing air between the disks on the runner, will disk spreading become
a problem? Should I put pins and washers like Tesla's orginal design?