Recently, engineering students at the University of Melbourne in Australia have developed a 3D printing drone with fire-fighting capabilities. The drone is resistant to high temperatures and can fly for 45 minutes. The development team hopes it can be used to fight forest fires.

This is no secret. In the United States, Christmas 2015 is destined to become the Christmas of drones. The country expects to sell more than 400,000 unmanned aerial vehicles throughout Christmas. Most of these are used for entertainment purposes. But in some functional areas, it is also widely used. For example, the prototype of Amazon's express drone Prime Air has been unveiled, with a speed of up to 90 kilometers per hour, with sensing and evasive capabilities, and is expected to change the express service forever. In addition, drones can also be used for aerial imaging, traffic management, etc. Forest fire protection is also a highly anticipated drone application.

The 3D printing drones created by a group of young engineering students at the University of Melbourne are extremely lightweight and will be delivered to the Victorian Urban and Rural Fire Brigade (MCFB). Of course, to meet the needs of fire protection applications, this 3D printing drone must meet a series of strict requirements, and has some special attributes, such as strong resistance to high temperatures, a strong body, a long battery Lifetime, and the ability to send thermal images to the ground in real time. These are all met by the efforts of the students.

For example, in order to improve battery life and increase flight time, students hope to reduce the resistance of the drone and improve its aerodynamic performance. To this end they have designed winged arms and other custom designed aerodynamic components. At the time of manufacture, the development team did not use carbon fiber. Due to its requirements for strength, light weight and high temperature resistance, the development team chose to use titanium materials and found a subsidiary of the Commonwealth Scientific and Industrial Research Organization (CSIRO). Print out the 3D Print Center Lab 22. According to China's 3D printing network, with the help of Lab 22 scientist Daren Fraser, the students also optimized their designs for 3D printing. These wing arms were printed in 3D in one day, and the remaining parts were also fully 3D printed the next day. Prior to assembly, each 3D printing component was sprayed with titanium alloy powder for surface treatment.

The end result proved that the students' design was quite successful. Compared to the previous version, the resistance was reduced by 60% due to the use of the wing arms, and the flight time increased to about 45 minutes, which is almost twice the previous one.

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