“This milestone is not just about a single flight. The architecture proven by the XRQ-73 paves the way for new types of mission systems and delivered effects. We look forward to advancing this technology through the flight-test program and delivering new capabilities for our warfighters.” Source: Lt. Col. Clark McGehee, SHEPARD program manager, explaining the significance of the XRQ-73, a hybrid-electric, unmanned experimental aircraft. The demo flight occurred at Edwards Air Force Base, Calif. in April 226 as part of DARPA’s series hybrid electric propulsion aircraft demonstration (SHEPARD) program.