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Re: [TCML] high frequency wave propagation along secondary coils
Wow. He's going to be in the coil arcs for 72 hours?
I imagine it will be quite boring for him sitting or standing around in a faraday suit, though it will be stunning to watch for most people unfamiliar with our sport.
...but on the other hand, not being able to pee for 72 hours is probably the height of the stunt. The guy previously locked himself in an ice block for days, suspended himself over london in a crane for nearly a month, stuck himself in a bubble of water for days in NYC, and held his breath under water for what, eight minutes?? So while the arcs are probably the least of his problems, he's got a track record of physical control.
However, the real hero will be Steve, who will have what is undoubtedly the longest continuous coil run in the history of humanity (other than, maybe, Tesla himself...)
Joe
On Sep 27, 2012, at 8:45 PM, Steve Ward wrote:
> Hi Paul,
>
> How much confidence do you have in those simulations? It basically
> shows about 2/3 of the top voltage applied across the bottom 10% of
> the winding, which sure looks like a recipe for failure.
>
> Project update: After days of testing the rig, i discover another
> secondary with a burn mark about the size of a dime. This time its
> about 8" from the bottom of the coil. The coil was still functional,
> and the damage appears to be localized. I suspect another shorted
> turn that "self-healed".
>
> BTW, here is a teaser video for the project:
>
> http://www.youtube.com/watch?v=P37dmtwT2fM
>
> Thats just footage from the start of the project using our old coils.
> The rig we built for the event is quite breathtaking, now its just
> gonna be an effort to keep it going for the 72 hours continuously that
> they want these coils to run for. The secondary-coil-surgeon is in
> the house!
>
> Steve
>
>
>
>> Yes dispersion spreads the down-going transient although
>> it could still build up quite a high volts/turn near the
>> base. This has been discussed before as one possible
>> cause of racing arcs. Here is an animation of secondary
>> voltage distributions (July 2009, modeled on Marco
>> Denicolai's Thor system),
>>
>> http://abelian.org/tmp/thor.anim1.gif
>>
>> A normal ring-up of the secondary occurs until at 40uS
>> the topload is suddenly and completely discharged to
>> ground.
>>
>> A slow-mo of the discharge,
>>
>> http://abelian.org/tmp/thor.anim2.gif
>>
>>
>>> During testing, our rig got rained on by a leaky roof.
>>
>>> ... to bake out the water from the remaining coils
>>> involved applying about 660W of power ...
>>
>>
>>> Upon disection of the coil that had the bottom winding
>>> fail, we found the wire was separated from the PVC form.
>>
>> I guess this is a more likely explanation for the fault.
>>
>> --
>> Paul Nicholson
>> --
>>
>> _______________________________________________
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