The first design to come from the team was the DM-1, which was found in an incomplete state at the end of the war by the Americans. Construction work had started on the DM-1 flying testbed in November 1944. A pure delta with 60° swept leading edges, it was to be used initially as a glider to investigate flight characteristics. Fin and rudder shape mirrored that of the wings, and the pilot was accommodated in a cockpit at the base of the fin.
It was originally intended to carry the DM-1 on the back of a Siebel Si 204 to a height of 25,900 ft (7,900 m),), from which it would dive to an anticipated speed of 348 mph (560 km/hr). At a later stage the DM- 1 was to be flown at a speed of 497 mph (800 km/hr) under the power of a rocket motor. At the other end of the speed range, the aerodynamic characteristics of this little single-seat aircraft were such that a landing speed of only 44 mph (70 km/hr) was expected. The Americans shipped the prototype back to the USA for completion and flight testing, and the resulting data were incorporated into the design of the many US delta-wing aircraft which appeared in subsequent years, such as the F-102 and F-106.