This illustrated WWII history reveals the full range of experimental military aircraft that the Third Reich nearly flew into combat. From jet planes and high-altitude aircraft to radar-equipped fighters configured to deliver chemical weapons, numerous secret Luftwaffe planes reached prototype stage during the Second World War. Had these innovative aircraft made it into combat, the course of the war could have gone very differently. Renowned aviation expert Manfred Griehl explores these projects through an informative and fascinating selection of images, including numerous wartime photographs. Despite the Allied authorities' ban on research, countless aircraft were designed and tested by the Luftwaffe and German manufacturers before World War II. The research went ahead at secret evaluation sites in Germany, Switzerland, Sweden and the USSR. Though this work continued after the outbreak of war, many projects were never completed, often because the developers simply ran out of time. This definitive guide reveals the remarkable range of planes that the Third Reich failed to complete.