Rockets
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As early as 1927 members of the Verein fДјr Raumschiffahrt (VfR) (“Spaceflight Society”) had started experimenting with liquid-fuelled rockets. Rockets using a solid propellant had been used as weapons by all sides in WWI, and as a result, the Treaty of Versailles forbade solid fuel rocket research in Germany. By 1932 the Reichswehr started taking notice of their developments for potential long-range artillery use, and a team led by General Walter Dornberger was shown a test vehicle designed and flown by Wernher von Braun. Although the rocket was of limited ability, Dornberger saw von Brauns genius and pushed for him to join the military.
Von Braun did so, as eventually did most of the other members of the society. In December 1934 von Braun scored another success with the flight of the A2 (A for Aggregat) rocket, a small model powered by ethanol and liquid oxygen, with work on the design continuing in an attempt to improve reliability. Many different liquid fuels had been developed, but the German military specifically encouraged the use of ethanol as a rocket fuel because Germany had always been hampered by a shortage of crude-oil-based fuels. Throughout WWII a wide variety of military rockets were fuelled by ethanol that was primarily derived from potatoes.
By 1936 the team had moved on from the A2 and started work on both the A3 and A4. The latter was a full-sized design with a range of about 175 km (110 miles), a top altitude of 80 km and a payload of about a tonne. This increase in capability had come through a complete redesign of the engine by Walter Thiel. It was clear that von Brauns designs were turning into real weapons, and Dornberger moved the team from Kummersdorf (near Berlin) to a small town, PeenemДјnde, on the island of Usedom on Germanys Baltic coast, in order to provide more room for testing and greater secrecy.
The A3 proved to be problematic, and a redesign was started as the A5. This version was completely reliable, and by 1941 the team had fired about 70 A5 rockets. The first A4 flew in March 1942, flying about 1.6 km and crashing into the water. The second launch reached an altitude of 11 km before exploding. The third rocket, launched on October 3, 1942, followed its trajectory perfectly. It landed 193 km away, and became the first man-made object to enter space.
Production started in 1943 on the wonder weapon Vergeltungswaffe