Many of us have seen smoke, gases or fumes in the sky and it is pretty common to see large trail intersections like clouds. While flying, each aircraft can experience condensation in different ways, but each is produced by conditions ranging from altitude to temperature.

I know what you’re thinking: Flying cars have a history? Do they even exist? At least that’s what I also thought, and it turns out it’s a long one. It starts in 1917 with Glenn Curtiss, who built the Curtiss autoplane, a combination between an automobile and an airplane, it was something unheard of back then. It looked like a car but with wings attached, so obviously, it never flew. It was only capable of making “short hops”. The good news is that it was the first stepping stone towards the exploration of the possibility of having flying cars in the future.

In the history of aviation, the goal to fly vertically was not far away from application. The world’s first practical vertical flight other than hot air balloons was accomplished by Igor Sikorsky who was the designer and the pilot for VS-300 helicopter. The design was using a single main rotor and single tail rotor.