Engineering mockups are very important tools for finding interferences and rapidly moving through concepts. Before detailed 3D models—and then drawings—are made, rough mockups are created using very inexpensive materials and easy assembly techniques. In this photo, XCOR CEO Jeff Greason examines tank placement in an early mockup of the Lynx engine truss made with plastic, PVC tubing, cardboard tubes, duct tape (what would we do without duct tape?!), composites and pour-in-place foam.
Tomorrow: DIY wind tunnel tests.