(not the place to debate the origin of the invention, Major de Seversky is credited as the inventor of the ionocraft, I am just regurgitating a thought I had while reading on Tesla)
A quick search reveals that not only is it possible to build these simple machines, high school kids build them as science fair projects!
Although fascinating, this project is outside the realm of my ability for now (read: until my brain grows).
Anyone with an inkling?
Seeing how there's no end to dangerous instructables, what's one more?
(I'll even go the next step and provide you with some plans)