Gizmag

A BAE Systems Jetstream research aircraft flew 500-miles from Preston in Lancashire, England, to Inverness, Scotland and back. This 500-mile (805 km) journey wouldn't be worth noting if it weren't for the small detail that its pilot was not on board, but sitting on the ground in Warton, Lancashire and that the plane did most of the flying itself.

What’s the difference between a Jetstream turned into a UAV and a regular one? The answer is: Not a lot. If you've flown in a modern, long-haul passenger aircraft you've already ridden in what is almost a UAV.

Autopilots have become computerized and incredibly sophisticated. While smaller aircraft may be restricted to simple autopilots to control roll or keep them flying level, larger aircraft have autopilot systems that can control takeoff, ascent, cruising, descent, approach, and landing. In the not too distant future, they will even be able to handle rollouts and taxiing.

This isn’t surprising because autopilots aren’t just a form of mechanical steering. They can control a plane’s throttles, determine its position using GPS, dead reckoning and radio beacons, and balance the plane by automatically pumping fuel from one tank to another. Furthermore, many modern airliners use fly-by-wire systems instead of direct hydraulic linkages. In this set up, the plane’s computers aren't just an adjunct to the pilot, they are an integral part of the controls and, in a sense, the pilot isn’t so much flying the plane as telling the computer what to do. Add in the situational awareness and ability to be directed from the ground that the experimental Jetstream has and you've got a UAV.

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