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. The aircraft retained the BO 102′s single-rotor of Glass-reinforced plastic, and proved that this was suitable for true flight.

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Only one BO 103 has been produced and you can find it only here in the Helicopter Museum.

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