The FBike is a collaborative effort between several Czech companies and enthusiasts. The propellers will be electrically-driven, but it looks like there are pedals there for added assistance, not unlike the ground-bound ped-elec bicycles we have today:
And this isn't just some geeks dreaming inside of a 3D rendering program either. They plan to have their first prototype ready for test flights this August. They've worked out the calculations and four 10kW compact brushless electric motors should be enough to power the large 1300mm (51-inch) twin propellers in the front and back. Add in a couple of 3.5kW stabilized motors for the 650mm (25.5-inch) side blades and you're in the air for three to five minutes at a time.