This week, Rocket Crafters, Inc. announced that it has been awarded a $542,600 contract from the Defense Advanced Research Projects Agency (DARPA) to build and test a large-scale hybrid rocket engine using D-DART, or Direct-Digital Advanced Rocket Technology. The recently patented 3D printing technology will be used to design, build and test a throttle-capable hybrid rocket engine with 5,000 lbf peak thrust over the course of eight months. Read more at 3DPrint.com: http://3dprint.com/182189/rocket-cra...arpa-contract/