DARPA Announces Newest X-plane: XRQ-73

The Defense Advanced Research Projects Agency (DARPA) has unveiled its latest X-plane, the XRQ-73, under the Series Hybrid Electric Propulsion AiRcraft Demonstration (SHEPARD) program. This hybrid-electric uncrewed aircraft system (UAS) has been officially designated as the XRQ-73.

The SHEPARD program, described as an “X-prime” initiative, aims to advance the development of long-endurance aircraft by integrating emerging technologies to reduce system-level risks. “The idea behind a DARPA X-prime program is to take emerging technologies and burn down system-level integration risks to quickly mature a new missionized long endurance aircraft design that can be fielded quickly,” stated Steve Komadina, the SHEPARD program manager. “The SHEPARD program is maturing a specific propulsion architecture and power class as an exemplar of potential benefits for the Department of Defense.”

The SHEPARD program leverages the series hybrid electric architecture and components from the previous AFRL/IARPA Great Horned Owl (GHO) project. The initiative is a collaborative effort, involving members from the Air Force Research Laboratory (AFRL), the Office of Naval Research (ONR), and various military personnel.

Northrop Grumman Corporation’s Aeronautics Systems sector, based in Redondo Beach, CA, serves as the prime contractor for the SHEPARD program. Key contributors include Scaled Composites, LLC, Cornerstone Research Group, Inc., Brayton Energy, LLC, PC Krause and Associates, and EaglePicher Technologies, LLC.

The XRQ-73 is categorized as a Group 3 UAS, with an approximate weight of 1,250 pounds. The first flight of the XRQ-73 is anticipated by the end of 2024, marking a crucial step in advancing the capabilities of hybrid-electric aircraft within the Department of Defense.

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