Re: Dryer duct toroid?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "James Robinson" <james.robinson-at-vistek.tv> 

Hi,

I have made two toroids in this manner - in both cases, I have used as much 
ducting as possible, giving the closest 'ridge' spacing - and is easier to 
handle.

I formed the toroid around an upside down bowl of some sort (a biggish 
mixing bowl), then applied a ring of tape to artound the circumference of 
the toroid to hold it in, then just taped one side of the toroid (the top 
as it were) which gives the ducting some rigidity, then turn the toroid the 
other way up, and do the bottom.  The bowl can then be removed, leaving a 
rigid toroid.  After this, a little extra tape here and there where 
necessary to cover any places where the tape has sunk ito the ridges - 
again the more ducting, the narrower the ridges, the neater it looks.

James


----- Original Message ----- From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, November 19, 2004 2:25 PM
Subject: Re: Dryer duct toroid?


>Original poster: "Black Moon" <black_moons-at-hotmail-dot-com>
>Yes I realise this, but im not quite able to get the duct to sit nicely 
>around the peice of metal while I tape it... do I need to use alot of 
>excess duct or should I strech it as much as I can? or do I insert 
>something into the duct to make it more rigid for taping?
>
>>From: "Tesla list" <tesla-at-pupman-dot-com>
>>To: tesla-at-pupman-dot-com
>>Subject: Re: Dryer duct toroid?
>>Date: Thu, 18 Nov 2004 16:17:53 -0700
>>
>>Original poster: "robert heidlebaugh" <rheidlebaugh-at-desertgate-dot-com>
>>
>>Many of us use dryer duct for toroids, but not plastic. We use metal, The
>>plastic ducting will serve to wrap aluminum tape sround as a form to hold
>>the metal tape.
>>    Robert   H
>>--
>>
>>
>> > From: "Tesla list" <tesla-at-pupman-dot-com>
>> > Date: Thu, 18 Nov 2004 06:39:33 -0700
>> > To: tesla-at-pupman-dot-com
>> > Subject: Dryer duct toroid?
>> > Resent-From: tesla-at-pupman-dot-com
>> > Resent-Date: Thu, 18 Nov 2004 06:42:09 -0700
>> >
>> > Original poster: "Black Moon" <black_moons-at-hotmail-dot-com>
>> >
>> > Hi, Iv heard of making a toroid with that flexable plastic dryer > exhaust
>> > duct, about 4" across, has a metal 'spring' that keeps it from > 
>> collapseing.
>> > Now, Iv found some duct laying around my house (Not even attached to a
>> > dryer, bonus at not having to disassemble the house!) but it kinda > 
>> shrinks
>> > into a little stack, and when I make a loop out of it, its like 3" > 
>> inside
>> > diamiter... so im kinda wondering, what do I do to make it rigid in the
>> > large toroid shape? are there any websites detailing making one?
>> >
>> >
>> >