In the spring of 1917, at the time Friz was working at the drawing board on his groundbreaking engine, the outlook for Rapp Motorenwerke was bad. The Army High Command wanted to commit itself to a few types of aircraft and aeroengine and then get these built under license by several companies. In the spring of 1917 a commission from the Reichswehr therefore inspected the Rapp engine plant. They had to decide which engines would in future have to be produced under license in Munich. In the end, the Rapp management was faced with the choice of manufacturing either Daimler or Benz engines. However, Franz Josef Popp seized the opportunity of presenting the new engine to the commission of experts, an engine which up to now had only existed in Max Friz’s drawings.