View Single Post
Bob S
#6
Dec12-09, 06:32 PM
P: 4,663
You might be talking about a homopolar generator, also known as a Faraday disk. See
http://en.wikipedia.org/wiki/Homopolar_generator
Sir Mark Oliphant (Australian National University, Canberra) built a large one that stored about 500 MJ of energy in the 1950's.
Bob S