Here is another awesome example of how 3D printing was able to overcome issues that traditional manufacturing methods would normally have faced. Boeing, and engineers with The University of Sheffield Advanced Manufacturing Research Centre (AMRC) created this 3D printed UAV. The design and printing process took much shorter, allowing them to use up only 24 hours instead of 120 hours for each rendition of the UAV.

"By understanding the capability of the FDM process and the associated software, we were able to manipulate the design to contain a number of unique features as well as preventing build deformation," says Mark Cocking, additive manufacturing development engineer in the AMRC Design & Prototyping Group.
They printed this UAV out with a Stratasys Fortus 900mc FDM 3D printer.