OTOH, I would not want to trust "containment" of a possible RSG "come-apart" to acrylic
(plexiglas), as plexi does not do too well with impacts compared to polycarbonate. Tungsten
is quite dense (19.3 gm/cm3), about equal to gold in density, but a heckuva lot harder! Those
flying electrodes could be hurled at over 100 mph from the disc should it break during operation!
Seems to me if the RSG is designed properly with adequate surface area of the metallic hardware
for supporting the stationary electrodes, the rate of heat dissipation, which would be further assisted
by the air flow "wind" generated by the flying electrodes, should be sufficient to prevent
the said parts from reaching ignition temperature of the poly (580C). As for the flying electrodes,
at least "mine" are mounted to an epoxy-fiberglass composite (G-10) disc, as poly will indeed
melt at a much lower temperature (140-150C) than its igniton temp. http://www.tcforensic.com.au/docs/article10.html
David R.
From: krux <krux@xxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Tuesday, January 7, 2014 7:42 PM
Subject: Re: [TCML] Geek Group HV Lab Fire
Lexan is a brand name for a type of polycarbonate sheet.
Common Acrylic Brands
Acrylite, Altuglas, Chemcast, Lucite, Optix, Perspex, Plexiglas, Repsol, Setacryl
Common Polycarbonate Brands
Barlo, Calibre, Hyzod, Lexan, Markrolon, Palsun, Sustanat, Tecanat, Tristar
As far as I remember, Chris mentioned they used Acrylic in the MMC. Polycarbonate is nasty stuff when it burns.. Acrylic on the other hand is much safer to deal with.. I still wouldn't breath in the vapors of acrylic, but the poisonous vapors are one of the reasons why most places won't laser cut polycarbonate (it also doesn't laser cut very well)
On 2014-01-07 14:24, jhowson4@xxxxxxxxxxx wrote:
> Ah,
> I did not know that about lexan, I'm glad I am using polycarbonate on
> my sparkgap.
>
> John "Jay" Howson IV
>
> Sent from a tiny phone with a tiny keyboard.
>
> ----- Reply message -----
> From: "terry" <terry@xxxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Subject: [TCML] Geek Group HV Lab Fire
> Date: Mon, Jan 6, 2014 9:04 pm
>
>
> Hi Chris,
>
> Sad to here of the fire and damage :(
>
> An idea is to get those fire alarms that have alarm level relay
> contacts. When the smoke detector goes off, the contacts close and a
> big contactor for the building's power drops the whole electricity
> show out. That probably would have easily saved the farm in this
> case. The system cost is fairly tiny.
>
> Try not to use Lexan for anything. It burns like napalm. I know
> everyone loves it, but in a fire you might as well use diesel fuel...
>
> Anyway, have fun with your rebuilding project!
>
> Best Regards,
>
> Terry
>
>
> On 01/05/2014 03:44 PM, Chris Boden wrote:
>> Of interest to the general HV world.
>> https://www.youtube.com/watch?v=_oDb7J71QVw
>>
>> https://www.youtube.com/watch?v=SaModLpPr38
>>
>> https://www.youtube.com/watch?v=Mm7WNpGsl1A
>>
>>
>> Cleanup is well underway, and reconstruction will begin immediately after.
>>
>>
>>
>> Christopher Boden
>> President, C.E.O.
>> The Geek Group
>> http://www.thegeekgroup.org/
>> We Build Awesome!
>>
>>
>>
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
>>
>
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