The BO-105 is a light, twin-engine, multi-purpose utility helicopter developed by Bölkow of Stuttgart, Germany. The four-blade hingeless main rotor, a worldwide first, with composite blades ensures high maneuverability. A BO-105cbs variant is used for promotional purposes by Red Bull USA is fully aerobatic, performing loops, rolls, Immelmanns and other maneuvers normally regarded as for fixed-wing aircraft only. All main systems (hydraulics, electric, fuel, lubrication) were designed to be fully redundant.

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