Helipal.com - Walkera UFO 117 Factory Test Flight

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UFO is something between "co-axial helicopter" and "helicopter with tail rotor". Thanks to the state-of-the-art 3D gyro technology, an UFO can almost hover itself without any control. A UFO in good condition is as stable as a co-axial helicopter.
However, the performance of an UFO is much better than a co-axial helicopter. It can fly as good as a helicopter with tail rotor. Outdoor flight is not a problem any more.
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