The turf-surfaced site, still bounded by the aforementioned hexagonal-layout ring road around its perimeter, was designated as the central Erprobungsstelle (E-Stelle) test facility of the Luftwaffe, and was expanded by constructing two more airfields: a second, smaller turf-surfaced field just east of the main site in nearby Roggentin and just south of the main site at Lärz, the latter of which became the modern 21st century airfield site.
The site, still enclosed by a ring road in a hexagonal layout around its perimeter, was designated as the central testing facility for the Luftwaffe. It was expanded by building two additional turf-surfaced airfields: one smaller field east of the main site in Roggentin and another south of the main site at Lärz. The latter became the modern airfield site of the 21st century.