Something bad or unexpected can happen when people send up a self-controlled flying machine like a drone without knowing how to really control it.

当人们在不知道如何真正控制它的情况下发射一个像无人机一样的自我控制飞行机器时，可能会发生一些糟糕或意想不到的事情。

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THE Pelican, a small, remotely controlled helicopter drone weighing less than a kilogram, is powered by a battery that provides about 20 minutes’ flying.

Pelican 是一种重量不到一公斤，依靠电池供电可以飞行二十分钟的遥控直升机。

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The two met soon after Mr. Anderson trolled the Web for fellow homegrown drone makers and saw a video of Mr. Munoz flying a helicopter using a repurposed Wii controller.

他们俩很快认识是在安德森先生为diy无人机伙伴搜索网页时看到穆尼奥斯先生在用改装的任天堂游戏机的控制器操控一直升机视频之后。

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Last month, the US said Iranian warplanes had shot at a US surveillance drone flying in international airspace.

BBC: Iranian TV shows off 'captured US ScanEagle drone'

Though, I must admit that drone flying in Wales sounds more fun.

FORBES: Wales Welcomes Drones, Hoping To Capitalize On FAA Foot-Dragging

With a common platform developers can focus on the specific application of their drone, rather than the flying system of the drone itself.

FORBES: Drone Startup Airware Lands $10.7 Million Series A Led By Andreessen Horowitz