In 1935, Paul Schmidt and Professor Georg Hans Madelung submitted a design to the "Luftwaffe" for a flying bomb. It was an innovative design that used a pulse-jet engine, while previous work dating back to 1915 by Sperry Gyroscope relied on propellers. While employed by the company, Fritz Gosslau developed a remote-controlled target drone, the FZG 43 ("Flakzielgerat-43"). In October 1939, Argus proposed "Fernfeuer", a remote-controlled aircraft carrying a payload of one ton, that could return to base after releasing its bomb. Argus worked in co-operation with C. Lorenz AG and Arado Flugzeugwerke to develop the project. However, once again, the Luftwaffe declined to award a development contract. In 1940, Schmidt and Argus began cooperating, integrating Schmidt's shutter system with Argus' atomized fuel injection. Tests began in January 1941, and the first flight made on 30 April 1941 with a Gotha Go 145. On 27 February 1942, Gosslau and Robert Lusser sketched out the design of an aircraft with the pulse-jet above the tail, the basis for the future V-1.