The Messerschmitt-Bölkow-Blohm (MBB) Bo 105 is a light, twin-engine, multi-purpose helicopter developed by Bölkow of Ottobrunn, West Germany. It was the first light twin-engine helicopter in the world, and the first rotorcraft that could perform aerobatic maneuvers such as inverted loops. The Bo 105 features a revolutionary hingeless rotor system, a pioneering innovation in helicopters when it was introduced into service in 1970. Production of the Bo 105 began at the then-recently merged Messerschmitt-Bölkow-Blohm (MBB).

Role: Light utility helicopter
National origin: West Germany
Manufacturer: Messerschmitt-Bölkow-Blohm (MBB)
First flight: 16 February 1967
Introduction: 1970
Status: In service
Primary users: Republic of Korea Army, Indonesian Army, Spanish Army, Philippine Navy
Produced: 1967–2001
Number built: 1,500+

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