They built an entire vehicle with 3D printers and called it Urbee 2. Its body is made using 3D printing and its whole will be mostly 3D printed. It is built in such a way that it looks like a production-ready car compared to the original. Figure 17: 3D Printed Urbee Car • 3D Printing In the Aerospace Industry NASA's rocket engine injector made with a 3D printer has passed a major hot fire test. In the test, the rocket engine's injector generated 10 times more thrust than any other injector made with 3D printing in the past. It also printed spare parts or tools to repair space stations and re-entry spacecraft. It will also make things easier because if one broke a tool, they would just print another one. The best thing about printing things, engineer Dr. Jason Dunn, pointed out that "gravity doesn't need to be considered when designing parts, and those sensitive tools would no longer need to survive the intense vibrations and gravitational loads present during the launch of the spacecraft". Figure 18: Made in Space tests 3D printing in microgravity4.1 Shortcomings of 3D printing• Limited