[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] Spark dynamics on Jacobs Ladder
My hypothesis is that the arc causes localized heating at the points where it
contacts the rods. this heating causes a bit of expansion at these points,
but only at these points. The expansion of both rods on their interior
surfaces causes them to bend away from each other just a bit above the arc,
wherever it is.
If you use hollow tubes, like rigid copper pipe, and enough power, like a pole
pig, you can see red spots at the contact points of the arc.
On Friday 18 January 2008 10:04:45 am Lau, Gary wrote:
> I hope this isn't viewed as too off-topic - I'll argue that the same
> physics apply to TC sparks ;-)
> I was giving a demonstration of various HV toys to a 4th grade class
> yesterday. Among the devices was a Jacobs ladder, powered by a 15/30 NST.
> The two 1/8" x 3 ft steel electrodes appeared to have been excited into a
> mechanical oscillation, bouncing towards and away from each other, at very
> roughly ~ 1Hz. One of the students asked my why they were moving, and I
> had to admit that I didn't know the source of the force that was moving
> The period of the oscillation was much faster than the arc travel time up
> the electrodes. It's clear that the period was that of the free-standing
> rods, and that the exciting force between them varies as a function of
> their separation, but I don't see the source of the attraction or repulsion
> between them. Any theories?
> Gary Lau
> MA, USA
> Tesla mailing list
Tesla mailing list