Flying your drone high in the mountains is no easy task. If you go really high up, like what was done by Bartek Bargiel in the rescue of Rick Allen, you may even have to de-restrict your drone through a hack. At high altitudes, the air has a lower density,¬†which makes it more difficult for your drone to fly. Lower temperatures also diminish your battery’s performance. This French video (English subtitled) explains in great detail what’s involved when flying your drone in the mountains.

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