Mewes was unfamiliar with advanced techniques such as all-metal construction and designed a conventional biplane with fabric covering. The Blohm Brothers had wanted a more radically advanced approach and, unhappy with Mewes, sought the advice of the RLM. On their recommendation the company offered the job of Chief Designer to Richard Vogt, who was then occupying that same position at Kawasaki in Japan and was experienced in all-metal construction.