The Vril 7 Geist (Ghost) was 45 meters in diameter and crewed by fourteen men. It was built in 1944 and tested at Arado-Brandenburg using Vril‘s own engine. Vril’s medium Sigrun made frequent trips to the facility to oversee construction and testing. In 1944, Arado engineers approached her with a request. They wanted to know if the Vril Triebwerk could be adapted to one of their projects- the Arado E.555 strategic bomber. They were abruptly told , “No” and returned to their designs which resulted in eleven different versions of the bomber. Sigrun was actually insulted because the entire purpose of the Vril discs was aimed at space flight. No conventional bomber could withstand the heat of the velocity achieved by these machines which were constructed of hulls specially made of an advanced metal called Viktalen (in some sources Victalen or Viktalon). The Vril 1 had a single hull of this type, the Vril 7 two. The large Haunbeu III had three! With the SS supervising all aspects of the disc programs every model had to have at least theoretical provision for armament. In the Vril 7 Geist it would have been four MK-108 cannon.