helicopter

texte_agro-tech\R_edition.cnn.com_TECH 2015 00204.txt.txt

"Successful flight tests have not only demonstrated its hovering capabilities during its vertical takeoff--the way a helicopter does

Now we're working on our second goal--to demonstrate that this concept is four times more aerodynamically efficient in cruise than a helicopter."

texte_agro-tech\R_techcrunch.com 2015 00002472.txt

and dangerous jobs much better than humans or helicopters. The problem is that drones can be difficult to program and pilot.

Planes and helicopters can be terribly expensive for collecting this overhead video and measurement data, though.

texte_agro-tech\www.livescience.com 2015 01253.txt.txt

The 62-lb. 28 kilograms) drone can take off vertically like a helicopter, but in the air it flies more like an airplane.

and hover like a helicopter, before demonstrating that it can also fly like a conventional airplane.

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