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A drone or other aircraft that derives its lift from four vertically-oriented rotors.

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Activities include the Harris Engineering Olympics, Quadcopter Challenge, a cardboard boat Lagoon Challenge in Palm Bay, Florida, as well as a 3-D printed bridge challenge and sailing simulation competition.
Seeing a quadcopter flying towards them, the instructor had taken control.
The purpose-built quadcopter drone is built with safety in mind and equipped with LED lights that can create over 4 billion colour combinations and easily be programmed for any animation.
It is pertinent to mention here that the University of Engineering and Technology will be showing an array of projects developed by engineering students, including autonomous wireless quadcopter, LED cube, self-balancing robots and robotic claw, at the event.
Libertyville career and technology teacher Andrew Thomson, who received $1,950 to teach students how to build and operate a quadcopter drone.
DJI Spark Quadcopter Alpine White - $399, save $100.
Indian quadcopter spying across LoC in Rakhchikri sector shot down by Pakistan Army shooters," tweeted Maj Gen Asif Ghafoor, Director General of the Inter-Services Public Relations (ISPR).
Here are some quadcopter safety precautions to keep in mind as well:
It is interesting to note that Stefan was one of the first photographers to use state-of-the-art quadcopter drones to give his photos fresh, new perspectives.
TEHRAN (FNA)- The US Army has delivered several commercial-off-the-shelf quadcopter style systems to the Kurdish-led Syrian Democratic Forces (SDF) to utilize them in war on ISIL, Coalition spokesperson said.
Combining a quadcopter with a driving mechanism presents a path planning challenge by enabling the selection of paths based off of both time and energy consumption.