There's stuff like dynamic soaring that Albatrosses use to travel thousands of miles over the ocean using little energy. Some enthusiasts use this to make RC g

There's stuff like dynamic soaring that Albatrosses use to travel thousands of miles over the ocean using little energy. Some enthusiasts use this to make RC gliders go really fast, and the record is over 500 mph. https://en.wikipedia.org/wiki/Dynamic_soaring https://en.wikipedia.org/wiki/Dynamic_soaring