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To: Maurice Winn who wrote (35197)6/20/2003 4:35:23 AM
From: Raymond Duray  Read Replies (1) | Respond to of 74559
 
Mq,

That nitrogen cooling has proven to be a real nemesis for the superconductor folks. I recall a very promising project to upgrade some utility conductors in downtown Detroit that were to be superconductors. The nitrogen cooling proved to be the weak link in the plan.



To: Maurice Winn who wrote (35197)6/20/2003 11:24:30 AM
From: smolejv@gmx.net  Respond to of 74559
 
>>In 1990, at the Tokyo science museum, our son and I saw little toy superconductor trains [and other superconductivity demonstrations, such as a rock melon supported on a ring of magnetic material]. <<

I saw a superconductor maglev kiddie train at Materialica here in Munich last (or one before last) year.

Some garage company from the former DDR...


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