This is from a popular science magazine article i read a couple years ago. Sorry i can't find a link (no surprise).
Well the article was talking about flying saucers. And they went into a method that was recently declassified at the time (US GOV). Basically the same concept of putting electricity to a foil disk and it floats. But to do this in the scale for a flying craft you need huge amounts of power.
So they explained how they did it. They circulated molten metal in such a way that it created huge amounts of static electricity. They most likely used a nuclear heat source.
This process interested me at the time, that is why i remember it, but now i can't find any info on it.
I thought the concept would be worth sharing even without a link. anyone else heard of this?
Sure. You are describing a basic Mercury Vortex engine, as used by the ancient Aryans in India. The Vimaanika Shastra describes in full detail how to build a Vimaana, a mighty flying house, powered by just such a liquid metal engine as you describe.
Google Electro gravitics & UFO propulsion Dr Paul Laviolette
He broke the story on using ferro-molten metals at sub temperatures
As molten metal has no force or friction at sub temperatures, you use ferro metal to create massive force with no friction or force, with small amounts of energy, you can easily reach speeds of over 700 mph with molten metal at sub temperatures