All Aero

After the war, in common with many other German pilots, and engineers, Ziese was taken forcibly to the Soviet Union to work on aviation development. The Siebel Company had been building three prototype supersonic research aircraft at the end of the war. These were then transported, in a partially completed form, to Podberesje in the Soviet Union, and after competition, were flown by Ziese at speeds of up to 1100 kph (683 mph). His letters back to Germany were written in a cryptic code, but inferred that he never managed to break the sound barrier. After suffering a bad crash in the DFS 346, Ziese died (some say was murdered) in a Russian hospital in 1951.