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2019916the a1 was the first rocket design in the aggregat seriest was designed in 1933 by wernher von braun in a german armed forces research program at kummersdorf headed by walter dornbergere a1 was the grandfather of most modern rocketshe rocket was 1metres 4 ft 7 in long, 30 centimetres 12 in in diameter, and had a takeoff weight of 150 kilograms 331 lb.