Another potential problem with having 4 stationary gaps is uneven
electrode erosion. If the stationary electrodes wear unevenly, then this
make it even harder maintain a very small gap spacing. This uneven wear
also becomes a problem as you increase the number of flying electrodes if
they wear unevenly. If the wear is uneven, the electrodes can collide if
you try to adjust some electrodes to compensate.
One thing to remember is that the more flying electrodes that you have,
the harder it will be to achieve precise electrode hole placement and to
balance the rotor. As you probably know, the rotor with the flying
electrodes needs to be made to a very high level of precision and
balanced very precisely or else it will shake your coil apart or worse. I
see from your transformer picture that you have a lathe. That will help a
lot. With a lot of careful thought, I was able to make my rotor with just
a bandsaw, a drill press, and a rotary die grinder. At the time, I didn't
have a lathe or a milling machine, which I now have.
The conclusion, as I see it, is to use as few stationary and flying
electrodes as possible. This minimizes the uneven erosion problem and
makes your gap maintenance easier.
The G10 (FR4) rotor material that you are contemplating is perfect.
Steve
----- Original Message -----
From: "Jan Ohlsson" <jan@xxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Monday, July 2, 2018 8:04:10 AM
Subject: [TCML] Re Please review my coil plan
Hi Kurt,
Your big coil is really impressive and it was not my intention to be
disrespectful to a pioneer like mr Burnett. A calculation method that
makes
it possible to establish a good balance between BPS, ballast inductor and
capacitor is of course of great value, regardless of if the charging
system
really is resonant in the true sense or not.
And thanks David,
You and others have certainly convinced me of the importance of
varnish...
Yes, the bomb shelter is a great place, but I will be dependent on a
counterpoise type ground, and I have gotten the impression that this
concept
is not that much tested for tesla use.
I was planning on an epoxy/fiberglass disk for the rotary, slightly
larger
in diameter (40 cm), in the hope that this would cool the electrodes
better.
But from ypur experiences with your high powered coil, I realize that
electrode erosion might be a bigger problem then I expected. I will try
to
achieve as much cooling as possible for the stationary electrodes, and
will
try to locate larger diameter rods. Perhaps double sets of stationary
electrodes would also share the load and keep up better?
All assuming that I first succeed with the transformer and ballast, of
course...
Kind regards,
Jan
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