At the end of World War II, Haunebu-III was developed with a diameter of about 70 meters. The prototype made 19 flights during which the properties were tested. It could accommodate in its interior up to 32 people and develop a speed of Mach 10 (about 40000 km / h). The ship's engines consisted of electrogravity generators.
Haunebu is also the name of a type of flying saucer mentioned by people.