In 1942, the Allied air strikes against the German and industrial targets were increasingly fierce, which made the Germans step up their research and development of anti-aircraft rockets and missiles. In September 18th of the same year, the RLM and the Rhine metals company officially signed new types of anti-aircraft missile research and development contracts. The main person in charge was Dr. Crein who developed the "Rhinebote" ground to ground tactical rocket. The new missile was called the ‘Rheintochter’, and it became another attractive and unique work in the history of German missiles. Rhine metals company developed the R-1 and the improved R-2 missiles, and carried out a number of tests in 1943, but was still unable to meet the military requirements for height. In 1944, a new type of R-3 was designed. The missile canceled the two stage structure; this single stage structure reduced the size and weight of the missile, and further increased the speed and distance of the flight. Wooden wings reduced weight and also the cost of manufacturing. The missile was equipped with 160 kg of high explosives, which were detonated by a radar terminal in the warhead. After the missile was launched, the system could be combined with radio guidance from the "Rhineland” radar system. Due to the planning of a liquid fuel engine, research and development lagged behind, and ultimately the change was made to a solid fuel engine. This model was called R-3p. It was still launched with a modified Flak41 88 mm anti-aircraft gun carriage. At the end of 1944 for tests, R-3p shot up to 12,000 meters, with the highest speed of 1,300 km/h. But the results still could not meet the needs of the military. The project was stopped in February 1945. Although the Germans planned to relaunch an assessment in March, the war was almost over, and ultimately it failed to achieve success.