According to foreign media new atlas, although there are some different crops spraying multi rotor UAVs, fixed wing UAVs are faster and have better battery life. < / P > < p > it is said that pelican, developed by pyka, a start-up based in Auckland, California, is much cheaper and easier to use than an internal-combustion, human driven fixed wing crop spraying aircraft. Moreover, since it is unmanned, there is no risk that the pilot will be killed or injured in the crash. The

UAV itself is 20 feet (6 meters) long and has a wingspan of 38 feet (11.6 meters). It can carry a spray payload of up to 625 pounds (283 kilograms) and can take off and land in a space of only 150 feet (45.7 meters). Thrust is provided by three 20 kW motors – two on the wing and one at the rear – that provide cruising speeds of 90 mph (145 kph). Powered by lithium polymer batteries, the motors are said to travel 70 miles (112 kilometers) when fully charged. The final version of Pelican will be able to use its three-dimensional mapping and path planning system to determine the location and boundary of the target area, as well as the obstacles in and around the area. This data (currently collected by ground personnel) is used to create a flight path that is continuously flying through the field, and the aircraft then flies according to that path. It can not only cruise autonomously, but also take off and land on its own, and is said to have never been more than one meter (3.3 feet) from the preset path. < / P > < p > according to pyka, Pelican can spray 135 acres per hour – a figure based on a 2-gallon (7.6-liter) spray rate per acre and includes fill time, U-turn and battery replacement. < / P > < p > one of the company’s early prototypes, egret, has been tested on crops in New Zealand. On October 1, however, Pelican received a special airworthiness certificate from the Federal Aviation Administration. This will enable it to conduct demonstrations on farms in the United States and train staff to use it. Spontaneous combustion at a Guangzhou Motor vehicle intersection and other traffic lights in Shenzhen

By ibmwl