In 1935, Dr. Adolf Rohrbach became technical director of a new Weserflug factory at Lemwerder, near Bremen, which opened in 1936.
Perhaps foreseeing the end of the war, the management of Weserflug transferred in 1944 from Berlin to Hoykenkamp, 15 km west of Bremen.
In 1948 a trustee, Horst Janson, was appointed to collect the assets of Weser AG, to which Weserflug belonged.
He was responsible for some postwar reindustrialization in Bremen, such as reactivating the shipbuilding industry, and joined the board of Weser AG.
In 1961, Weserflug joined forces with Focke-Wulf - also of Bremen - and Hamburger Flugzeugbau in the Entwicklungsring Nord (ERNO) to develop rockets.