Re: The Egg Works - Well, Almost

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "huil888" <huil888@xxxxxxxxxxxx>

Bart -

You definitely don't want to use any type of liquid to add mass or
redistribute mass within the egg. As you noted, the viscous damper 
used on engine
crankshafts is there to absorb energy (torsional vibration).

A great example of internal fluid damping is to try to spin a raw egg and
then a hard-boiled egg. The raw egg can't be spun (unless you cheat and
freeze it), while a hard-boiled egg can be easily spun and will "stand-up"
instantly just like a toy top.

Regards,
Scott Hanson
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, October 05, 2006 11:10 AM
Subject: Re: The Egg Works - Well, Almost


> Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
> Congrats on the power up spinning of the egg! I couldn't make out detail
> very good in the video (my pc sucks), but I could certainly see it
> spinning. I doubt the hollow egg is the cause of not spinning up
> completely. If it is the "weight" of the egg that is the issue, you could
> always drill a small hole in the top of the egg and insert a liquid to
> weight it on it's bottom end (water or oil would probably be fine). This
> would be similar to a fluid damper used on engines for balance. Just a
> thought.
>
> Make sure you do a good write up of this experience!!! I plan on building
> one (after you figure it all out);-)
>
> Take care,
> Bart
>
> Tesla list wrote:
>
> > Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxx>
> >
> > Hey guys,
> >
> > I was able to power up the egg last night and after figuring out I had one
> > pair of coils out of phase, I got it working. The egg spins up as you can
> > see here:
> >
> > http://www.teslauniverse.com/images/egg_of_columbus/MOV00628.MPG
> >
> > Notice the egg spins, but never stands all the way upright. I am not
> > certain
> > whether this is due to lack of field strength or if it's caused by the
> > hollow egg's poor center of gravity. I am going to wind another layer of
> > 12AWG on each coil and see if it improves. I'm looking for another egg
> > too.
> >
> > Here are some better pictures of the setup:
> >
> > http://www.teslauniverse.com/images/egg_of_columbus/DSC00624.JPG
> > http://www.teslauniverse.com/images/egg_of_columbus/DSC00625.JPG
> > http://www.teslauniverse.com/images/egg_of_columbus/DSC00626.JPG
> >
> >
> > This is a schematic of Harry Goldman's driver along with a picture of his
> > system he sent me:
> >
> > http://www.teslauniverse.com/images/egg_of_columbus/hg_egg_schematic.jpg
> > http://www.teslauniverse.com/images/egg_of_columbus/hg_driver.jpg
> >
> >
> > Gary Lau pointed out that the black cylindrical AC caps I had could be
> > non-continuous duty motor starting capacitors. I confirmed this last night
> > after running the egg for about 10 minutes and finding them to be rather
> > hot. It does look like Harry is using these also by the photo. The silver
> > MOT like AC caps run cold and I'll use those from now on.
> >
> > Harry was right on with the values in the schematic. I am using actually
> > 16
> > ohms, because 8 is too low and the resistors I have are 4 ohm. I do notice
> > that the set of coils the resistor drives runs hotter than the coils
> > driven
> > by the capacitors. This makes me wonder if there is still too little
> > resistance. More experimenting and maybe testing with a scope will
> > hopefully
> > help with this.
> >
> > More later,
> > Cameron