It really shouldn't be all that difficult to build a so-called "flying car" if your customer is the Pentagon. Just build a helicopter and put driveable wheels o

It really shouldn't be all that difficult to build a so-called "flying car" if your customer is the Pentagon. Just build a helicopter and put driveable wheels on the bottom. You'd probably want to add some kind of rotor-folding mechanism to enable it to fit on a road, but that shouldn't be too tricky either. Building a flying car only becomes difficult if you need something that isn't incredibly loud, incredibly expensive and incredibly hard to fly. The military can live with loud, expensive and hard to fly vehicles, though.