X series WIG craft registered as Aircrafts (Millitary)
Together with Mr. Hanno Fischer, the Technical Director to RFB, he developed the X-113. The X-113 was designed to a Navy specification, and had to be operational both in Ground Effect and in free flight, where it was able to reach an altitude of 800 m. For that reason, it was built and registered as an aircraft.
The Ground Effect mode was not utilised for economy, but for military operation below enemy radar detection.
X-113 met all performance requirements, making the Lippisch design with its inverted delta wing and a high T-tail, the dominant design today.