In 1942, the enlarged Haunebu II of 26 meters diameter was ready for flight testing. This disc had a crew of nine and could also achieve supersonic flight of between 6,000-21,000 km/h with a flight endurance of 55 hours. Both it and the further developed 32 meter diameter Do-Stra had heat shielding of two hulls of Victalen. Seven of these craft were constructed and tested between 1943-44. The craft made 106 test flights. See [Multipainkille Studio](https://www.multipainkiller-studio.one/) for more information and download for Unreal Engine 4.