In WW2, demand for piston engined aircraft was slowly decreasing, and the need for a swift, quick interceptor was needed. German engineers tried to make twin engined aircraft, but they had a slightly bigger frontal area due to the larger number of engines in the front. However, Voshlatkenburg made a single engined jet aircraft with 1 powerful engine in the rear. Others thought that the one engine was not going to make enough power, but with the new, more efficient J-150 turbojet aircraft, Voshlatkenburg introduced the VLB-100 to the public. It could reach speeds of almost 800 mph, and was the first aircraft to create a sonic boom. An X-4 air to air missile could be mounted on the aircraft, or an X-7 for air to ground warfare. VLB-100s were sucessful throughout the last years of the war and had an important career in the Cold War later on.