Hydrogen has been touted as one of the most promising alternatives to our current dependence on fossil fuels to power cars because it fits our current driving habits. Whereas plug-in electric vehicles have limited range and take a long time to recharge, hydrogen fuel cell electric vehicles can be refueled in a matter of minutes from a pump that looks similar to a fuel pump. BMW has continued its development of hydrogen technology with a new 5 Series GT based prototype, which can drive for 500 km (311 miles) before it needs to be topped up.
One hour of flight time, a top speed of 100 km/h (62 mph), a payload of 5 kg (11 lb) – these are big figures for a drone, and figures that are basically out of reach using today's LiPo battery technology. But German startup Yeair! believes it's possible using a hybrid system in which each rotor is driven by two motors – an electric, and a two-stroke 10cc gasoline engine. And the Yeair! team has its sights set on something even more impressive down the track – personal flight in a two-seater hybrid octocopter. The quadcopter of the future, according to German startup Yeair!, will eclipse the performance of current quads by using the fuel of the future… Gasoline. Wait, what?