US farmers get approval to for drones

A crop spraying drone has been given US federal approval - the first time a drone big enough to carry a payload has been a given the tick of approval.

A drone large enough to carry tanks of fertilisers and pesticides has won rare approval from federal authorities to spray crops in the US.

The drone, called the RMAX, is a remotely piloted helicopter that weighs 94kg, says Steve Markofski, a spokesman for Yamaha Corp USA, which developed the aircraft.

Smaller drones weighing a few kilograms had already been approved for limited use to take pictures that help farmers identify unhealthy crops.

It is the first time a drone big enough to carry a payload has been approved, Markofski said.

The drone already has been used elsewhere, including by rice farmers in Japan. The FAA approved it for the US on Friday.

"I certainly understand their cautious approach," Markofski said on Tuesday. "It's a daunting task given our airspace is complicated."

The drone is best suited for precision spraying on California's rolling vineyards and places that are hard to reach from the ground or with larger, piloted planes, said Ken Giles, professor of biological and agricultural engineering at the University of California.

Giles tested the drone in California to see if it could be used there.

"A vehicle like this gives you a way to get in and get out and get that treatment done," he said.

Brian Wynne, president and CEO of the Association for Unmanned Vehicle Systems International, said in a statement that the approval highlights other potential uses.

"The FAA is taking an important step forward to helping more industries in the US realise the benefits (drone) technology has to offer," he said.

Source: AAP

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