Werner von Fritsch
After demonstrating the new engine to Dornberger, Rudolph moved to the proving grounds at Kummersdorf along with Riedel, and began working under von Braun. Rudolph's engine was used in the Aggregat series of rockets. In December 1934, the von Braun team successfully launched two A-2 rockets from the island of Borkum. Static testing on the A-3 engines began in Kummersdorf in late 1936 and were observed by General Werner von Fritsch, the commander-in chief of the German Army High Command.