Re: [TCML] DIY dent-proof Toroids

[Jon Danniken <danniken@xxxxx>]

I remember reading about one list member who put paper mache on an
inflated inner tube (might have been a pool toy), then just popped it
when the mache was all set up, and finished it with paint and tape like
any other form.

Jon

On 05/27/2013 12:31 PM, Peter Terren wrote:
> 
> 
> I used a tractor tube inflated with air covered in chicken wire. In a short time ozone perished the rubber and deflated it. Was great otherwise, superlight and bouncy.
> Used on my index page photo.
> tesladownunder.com
> 
> 
> Peter TerrenPhil Tuck <phil@xxxxxxxxxxx> wrote:Clive,
> I blew one up once with air with an idea to using it covered with Alu foil, but it wasn't particularly uniform in shape. So I presume you would get the same misshapen result if using it as a mould. Also the pressure to get it inflated may be too much for foam?
> Someone on the web has used them though, I'm sure I've seen them. Dr Peter T in Australia comes to mind for some reason.
> 
> Phil
> 
> 
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Clive Penfold
> Sent: 27 May 2013 18:04
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] DIY dent-proof Toroids
> 
> I'm sure it has been mentioned before, but why not use a vehicle inner tube as a mould. The only disadvantage that I can see is after you have cut off the tube, you would need to glue in a centre disc which wouldn't be as strong as in Phil's design
> .
> In the UK, the cheapest source of aerosol expanding foam that I have found is Toolstation
> 
> 
> http://www.toolstation.com/shop/Adhesives%20&%20Sealants/Expanding%20Foam/Expanding%20Foam/d180/sd2857/p27912
> 
> Clive
> 
> 
> 
> 
>> ________________________________
>> From: "mddeming@xxxxxxx" <mddeming@xxxxxxx>
>> To: tesla@xxxxxxxxxx 
>> Sent: Monday, 27 May 2013, 17:34
>> Subject: Re: [TCML] DIY dent-proof Toroids
>>
>>
>> Perhaps "spin-balancing" while it cured would solve some of the distribution problem, especially if done in several steps, building towards the inside to allow proper out-gassing. When in a confined space with some air, the out-gassed fumes from "Great-Stuff" foam are nicely explosive!
>>
>>
>> Matt D.
>>
>>
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