Re: [TCML] Project Hathor 2000 Volt Test Fire

[jimlux <jimlux@xxxxxxxxxxxxx>]

On 2/27/16 11:35 PM, krux@xxxxxxxxxx wrote:
> So brief little update on Hathor, the ring launcher I built.  We did a full
> power test fire last night.  And apart from breaking most of the wire ties
> holding the coil in place, everything worked nicely.
>
> https://www.youtube.com/watch?v=iFurvAEPmZg
>
> Main project page is here:
>
> https://krux.org/article/Project_Hathor
>
> Now of course, that I have this fine scientific insturment, I'm curous of a
> good method of meauring how many amps this thing produces when it fires, what
> the disharge curve looks like, etc..
>
> So 2000 volts, at 1560 uF, or 3120 Joules.
>
> I'm guessing I can take the energy in Joules, some how measure how long it
> takes to fire, which will give me how many watts.  Then it's a simple matter
> of Ohms law to figure out my amperage, or at least amperage averaged over the
> time it took to fire.

Do you have an oscilloscope?

With just a simple loop of wire somewhere in the vicinity, you can get 
an idea of what the current waveform looks like (duration and shape), 
without knowing the actual values.
Once you know that, you can start to estimate the peak current, which 
would allow you to figure out how to make a current transformer, or shunt.




> Any ideas, or other data points that would be useful to have here?
>
> perl -e 's==UBER?=+y[:-o]}(;->\n{q-yp-y+k}?print:??;-p#)'
>
>
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