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Re: Ball Lightning
Original poster: <davep@xxxxxxxx>
> Some BL reports say that it can form suddenly indoors, as if "winking
> on" but not drifting in from outside. If so, then it's not exactly
> electrostatic, since a house will shield the DC thunderstorm field.
How does a 'house' shield from a DC field?
A wooden house, with a few nails scattered about?
("Aluminum siding, or steel frame commercial construction,
> More likely it requires a transient high e-field such as those in the
> miles of space surrounding a lightning strike.
There are at least two reports in Barry that do not seem
to involve HV or high fields.
[Granted: one of the complications of BL (and the like)
is distinguishing between 'BL', things that might be 'BL',
and various things that 'look like' 'BL'.]
One involved a short circuit in a Hydro power plant 6000VAC odd,
on an alternator bus.
Another involved (intentional?) short test on a bank of
submarine propulsion batteries: call it 600VDC at Gee Criminy
I Dunno But Many amps. (The latter could be followed up,
given budget.) cf Barry for details of both.
at some point (There is a searchable copy online ?) Tesla
reported 'fire balls' being seen in the sparks from one coil.
Whether these were real, or optical illusions (i tend towards
real)? His secondary used rubber covered wire, hence the
use of rubber to 'seed' the maybe fireballs by modern experimenters.
(Not that it matters, but I was at the ITS Tesla Con when this
was discussed. Many (tho not all?) BL phenomona seem to fit
with a 'strange, low temperature, combustion' model. I could be