300 Hundred mile range

Powered by six hydrogen fuel cell batteries - one for each rotor engine - the aircraft are designed for a range of 300 miles but are envisioned mainly for short urban hops or flights between nearby cities.

This answers my question, what would be the range f a flying car if we replaced batteries with a more liquid fuel.  Electric drive is great, more stable than a regular copter. The same concept should work for planes also.