Sperrle was involved in the difficulties in German aircraft procurement. Four months after assuming command, Sperrle was rigorously critical of the Dornier Do 11 and Dornier Do 13 in a conference on 18 July 1934. Five months later, with development failing, Sperrle met with Wolfram Freiherr von Richthofen, head of aircraft development and "Luftkreis" IV commander Alfred Keller, a wartime bomber pilot. It was decided Junkers Ju 52 production would be a stopgap, while the Dornier Do 23 reached units in the late summer, 1935. The awaited Junkers Ju 86 was scheduled for testing in November 1934 and the promising Heinkel He 111 in February 1935. Richthofen remarked, "it is better to have second-rate equipment than none at all", though he was responsible for bringing in the next generation of aircraft.