Breaking the sound barrier, ejecting at low level and pushing new aircraft to the limits - it's all in a day's work for the military's elite test pilots

Daily Mail - 4/7/2013

We’re a couple of thousand feet above fields and trees when Simon Sparkes decides to make this flight in a Gazelle helicopter a little more interesting. Left to its own devices, even though it is flying straight and level, the craft will pull to the left because of the torque caused by its tail rotor. If not corrected, the helicopter could end up out of control. To compensate, the aircraft’s computer, called the Stability Augmentation System, automatically makes the corrections required.

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