Yamaha R-MAX

The Yamaha R-MAX and its predecessor, the Yamaha R-50, were developed in the 1990s in response to demand in the Japanese market for aerial agricultural spraying. Fixed-wing manned crop dusters had been in use in Japan for many years, but the small size of most Japanese farms meant that this method was inefficient. Manned helicopters were sometimes used for spraying, but were very expensive. The R-MAX allowed much more precise small-scale spraying, at a lower cost and lower risk than manned aircraft. The R-MAX was approved for operation in the United States by the Federal Aviation Administration in 2015. ==Operational history==

, the R-MAX fleet has conducted over two million hours of flying time in agricultural roles and several other capacities, including aerial sensing, photography, academic research, and military applications. Research The R-MAX has been used by several universities worldwide for guidance and automatic control research. In 2002, Georgia Tech's UAV Research Facility began using a Yamaha R-MAX for research into autonomous aerial guidance, navigation, and control systems. Carnegie Mellon University, the University of California Berkeley, UC Davis and Virginia Tech have also used R-MAX units for research. ==Variants==

In May 2014, Yamaha partnered with the American defense firm Northrop Grumman to produce the fully autonomous R-Bat variant of the R-MAX which they see having military and civilian applications. ==Specifications (R-MAX)==