Re: foil-covered inner-tubes for large toroids?

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

Original poster: "Brian" <ka1bbg-at-webryders-dot-net> 

Hi, i have used alum frying pans epoxied together, also fan shrouds work
pretty good, and some of the big fans like a Rich winjammer has a big
shroud, not too thick, nice rounded edge. i am going to weld some of the
cheap fan shrouds together with mig someday. the one on my tesla #3 is just
taped with vinyl electrical tape to hold it together. every once in a while
it burns thru the tape, so i put another strip on. I should weld it to cure
this problem. the chicken wire on styro or plywood also work.
cul brian f.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, October 25, 2004 7:05 PM
Subject: foil-covered inner-tubes for large toroids?


 > Original poster: DRIEBEN-at-midsouth.rr-dot-com
 >
 > Hi all,
 >
 > I've been thinking of an affordabale alternative to a large
 > pofessional spun toroid for a large coil. I've heard of sev-
 > eral ideas, including the chicken wire covered wood and styro
 > foam skeleton frames. I almost certain that my idea is not
 > original, but I was wondering what you guys thought of a
 > large inflated tractor tire inner tube covered in alumi-
 > num foil or tape. Of course it would be imperative that it
 > didn't leak and I know that the small inner tube lined pneumatic
 > tires (wheelbarrels, 2-wheel dollies, ect.) are notorious
 > for slow leaks. My 2-wheel dolly tires always have to be in-
 > flated before use if I haven't used it in a while. Hopefully,
 > tractor tire inner tubes are somewhat more dependable for
 > holding air as I'm sure a farmer wouldn't want to always
 > worry about his tractor tires holding air. Has anybody had
 > experience with this approach at a large toroid?
 >
 > Thanks,
 > David Rieben
 >
 >
 > David Rieben
 >
 >
 >