Re: Aluminum tape on toroids? Thanks for your replies!

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Original poster: Phlunktfysics101-at-aol-dot-com 

I appreciate all the responses you folks have posted in regards to my 
inquiry!

My original toroid design was to rivet aluminum duct to a water heater 
pan.  Which I did, and it came out very nice.  But I've read about the 
energy loss due to the rough surface of the duct, so I thought I would then 
cover the already assembled toroid in AL tape.  I see now that it would 
have been a better idea to cover the duct in tape BEFORE riveting it to the 
pan.  That would have made at least every other strip have a rivet making 
contact between the pan and the tape.

It wouldn't work for a continous wrap around, but if someone intended to 
wrap a toroid in sections it may be useful to fold over like 1/4" on one 
edge of the tape before sticking it on.  Then there would be at least a 
small portion of actual metal to metal overlap when wrapping.  But I 
imagine this could be done for strips of maybe only 1 to 1.5 feet in length 
without driving you crazy.

Thanks for all the advice and info!
Jack