You may have seen the multi-rotor flying toy helicopters. These guys have scaled one up to be big enough to carry a person. I can't imagine that they will be able to get any useful range using electric (battery) power, but a few years ago nobody dreamed you'd be able to make an electric flying anything. I was dreaming of making something like this a while back, but I was thinking about using a bunch of lawn mower engines, maybe 8 or 10 arranged in a circle, much like they have done here. I was worried about stability though. Stability of the machine in the air, and of my checkbook on the ground, so I didn't pursue it.
31 minutes ago