Dittmar then became a research pilot. In 1934, he, Hanna Reitsch, Peter Riedel, and Wolf Hirth were members of Professor Georgii's South American Glider Expedition,[1]:65 where in Argentina he achieved a new world gliding altitude record (about 4,350 metres (14,270 ft)).[2] Later the same year, he achieved a new world record for long-distance using a Fafnir II and was awarded the Hindenburg Cup.