The Bölkow Bo 103 was a small experimental helicopter flown in Germany in 1961 to research new rotor systems. While the mechanics of the aircraft were based on the Bo 102 captive training rig the Bo 103 was capable of fully independent flight. In configuration it was absolutely minimalist - consisting of nothing more than a tubular frame to which the dynamic components and the pilots seat were attached although a small fibreglass cabin was eventually attached.
Made by Bölkow.