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giant metal structure

It's getting warmer where I live (that's global warming for ya) and I wanted to start testing my free energy instructable again. Does anybody know or have any good ideas for a non grounded big metal object or way to make one?

a chain link fence could be a good place to start, then raise it up on wooden posts, TV aerials, satellite dishes. Oh a giant shroud of steel wool on a pole would work for surface area and steel clouds sound good to me, could be functional installation art (with a bit of imagination.)
Flag pole?