Design and fabrication of a hovering multipurpose agro carrier

The HMAC (Hovering Multipurpose Agro Carrier) is designed to minimize the efforts of the farmers for spraying the pesticides and transferring small objects from one place to another by hovering above the ground. Lithium Polymer batteries power the HMAC. It has 700 KV and 1600W brushless out-runner motors with 15 x 5.5” propeller, which gives 7.5 kg thrust on each motor. HMAC is a twin-ducted device so it can produce a total thrust of 15kg. The motors are connected to flight controller through ESC’s (Electronic Speed controllers). The KK2.1.5 flight controller is used for the stability of the HMAC during its flight. The forward and backward motion is coordinated by lowering the speed of 1 motor and increasing the speed of another. The sideward motion is controlled by using the concept of VTOL (Vertical take-off and lifting). The weight of the frame is 4.2 kg which includes motors, ESC’s, Batteries, flight controllers and receiver. The total thrust that it can produce is 15kg. With the losses, it can carry a payload of around 10 kg, which includes pesticides, tank, DC pump and spraying nozzle. After using various fabrication processes, the frame was constructed. The electronic parts after assembling were calibrated. After successful calibration, HMAC took its first flight and was able to achieve its objectives.