The U.S. military has achieved a significant milestone in aerospace technology with the first flight of the XRQ-73, an experimental hybrid-electric stealth drone. Developed by Northrop Grumman, the drone took to the skies at Edwards Air Force Base in California earlier this year, as confirmed by the Defense Advanced Research Projects Agency (DARPA).
Hybrid Propulsion for Stealth and Efficiency
The XRQ-73 utilizes a cutting-edge propulsion system that blends electric and jet fuel technology, designed to reduce fuel consumption and emissions while enhancing stealth capabilities. This innovation marks a departure from traditional medium- to long-range military drones, which typically rely on jet engines or propellers.
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.
Lt. Col. Clark McGehee, the program's manager, emphasized the broader implications of the drone's successful flight. The XRQ-73 is classified as a Group-3 drone, capable of operating at altitudes below 18,000 feet and speeds ranging from 115 to 287 mph. With a weight of approximately 1,250 pounds, it is a medium-sized tactical system aimed at fulfilling urgent operational needs.
Design Inspired by Stealth Aircraft
The drone’s design draws inspiration from other stealth aircraft, such as the B-2 Spirit bomber and the RQ-170 Sentinel. However, the tailless XRQ-73 features distinctive winglets at the ends of each wing and a front-facing camera near its nose. These elements contribute to its advanced stealth capabilities and mission adaptability.
The development of the XRQ-73 is part of the Air Force Research Laboratory's Great Horned Owl program, which focuses on creating efficient and ultra-stealthy reconnaissance drones. While an earlier iteration, the XRQ-72A, was in development as early as 2010, it remains unclear whether it ever achieved flight. The XRQ-73’s successful test flight underscores the U.S. military’s commitment to maintaining technological superiority in aerial warfare.