Solid-rocket motor startup Ursa Major and defense prime Raytheon teamed up to develop an advanced long-range, solid-rocket motor, which has completed a successful missile flight test for the Army, the companies announced Wednesday. The sub-10-inch-diameter solid-rocket motor took four months from concept to successful test -- a “lightning-fast” timeline, according to Ursa Major CEO Dan Jablonsky. “Using our additive manufacturing techniques, using our agile manufacturing systems and using the expertise and know-how that we’ve developed as propulsion engineers, we were...