and the "Heylandt Rocket Car" was born and was exhibited at Tempelhof Aerodrome. While it was a technical success, the fuel costs were greater than the admissions received and performances were discontinued. Rudolph joined the Nazi Party in 1931, then later the SA. Rudolph first met Wernher von Braun when he visited a meeting of the Verein für Raumschiffahrt (VfR, the "Spaceflight Society"). In May 1932 Rudolph was laid off and looking for work when he encountered Pietsch. After forming a partnership Rudolph began design on a new engine, while Pietsch looked for a backer. Pietsch met with Walter Dornberger, who had been tasked by the German Ordnance Department to develop a rocket weapons system and had become interested in the VfR. 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. The Kummersdorf facilities were inadequate for continued operations, so the von Braun team was moved to Peenemünde in May 1937 where Rudolph was tasked with the building of the A-3 test stand. The Rudolphs lived in nearby Zinnowitz, where their daughter, Marianne Erika, was born on November 26, 1937. The A-3 series was plagued with guidance problems and never proved successful. In early 1938, Dornberger put Rudolph in charge of the design for the new production plant to be built at Peenemünde for the A-4 series, later renamed the V-2 (Vergeltungswaffe-Reprisal Weapon-2). World War II In August 1943, as Rudolph was ready to begin production of the V-2, the British bombed Peenemünde. After Peenemünde was bombed, the V-2 production facility was moved to the Mittelwerk facility, which was near Nordhausen and underground. Mittelwerk was originally a gypsum mine that was being used as a storage facility and was being excavated for production facilities. The labor force consisted of prisoners who were eventually housed at the Mittelbau-Dora concentration camp. Rudolph was in charge of moving the equipment from Peenemünde to Mittelwerk, working under Albin Sawatzki. After the plant was in place, Rudolph was operations director for V-2 missile production.