[1] Slovak designer Professor Štefan Klein began working on flying cars in the late 1980s.
[4][5] When on the road, the retracted tail surface creates a downforce similar to conventional rear aerofoils.
[6] Power is provided by a 1.6 litre BMW road car engine, running on automotive petrol or gasoline and delivering 104 kilowatts (139 hp).
[5] The prototype AirCar is of comparable length to a Mercedes S-Class saloon, at 5.2 metres (17 ft 1 in), and around 2 cm (0.79 in) narrower.
[5] A second, pre-production prototype is expected to have a monocoque fuselage with a more powerful 220 kilowatts (300 hp) engine.