Defense & Military
DARPA and Northrop Grumman Complete First Flight of XRQ-73 Hybrid UAV
DARPA’s XRQ-73 hybrid-electric UAV flew first at Edwards AFB, testing series hybrid propulsion for efficient, stealth ISR missions.

This article is based on an official press release from Northrop Grumman.
In a significant milestone for military aviation, the Defense Advanced Research Projects Agency (DARPA) has successfully conducted the first flight of the XRQ-73, an experimental hybrid-electric uncrewed aerial vehicle (UAV). According to an official press release from Northrop Grumman and supplementary industry research, the inaugural flight took place at Edwards Air Force Base in California in April 2026, with the official announcement following on May 6, 2026.
Developed under DARPA’s Series Hybrid Electric Propulsion AiRcraft Demonstration (SHEPARD) program, the XRQ-73 was built in collaboration with the Air Force Research Laboratory (AFRL), Northrop Grumman, and its rapid-prototyping subsidiary, Scaled Composites. The aircraft is designed to test and validate the military utility of series hybrid-electric propulsion systems in a fieldable design.
By decoupling the combustion engine from the direct propulsion of the aircraft, the XRQ-73 aims to provide future military fleets with enhanced fuel efficiency, reduced emissions, and ultra-quiet operation. These characteristics are highly sought after for stealthy intelligence, surveillance, and reconnaissance (ISR) missions in contested environments.
The SHEPARD Program and XRQ-73 Development
The SHEPARD program is classified by DARPA as an “X-prime” initiative. As noted by former SHEPARD Program Manager Steve Komadina in 2024, the primary objective of an X-prime program is to leverage emerging technologies and rapidly “burn down system-level integration risks” to mature new, mission-ready aircraft designs quickly.
The XRQ-73 builds directly upon the technological foundation laid by the earlier Great Horned Owl (GHO) project. That initiative produced the XRQ-72 drone for the Intelligence Advanced Research Projects Activity (IARPA) and the AFRL. However, the XRQ-73 represents a significant scale-up in size and capability. Industry research indicates that the new aircraft weighs approximately 1,250 pounds (567 kilograms), making it substantially larger than the XRQ-72, which weighed between 300 and 400 pounds.
Aircraft Classification and Design
The U.S. Department of Defense classifies the XRQ-73 as a Group 3 Uncrewed Aircraft System (UAS). Based on standard U.S. military definitions, Group 3 drones typically operate at altitudes ranging from 3,500 to 18,000 feet and achieve top speeds between 100 and 250 knots (up to 288 mph). To maximize aerodynamic efficiency and stealth, the XRQ-73 utilizes a tailless flying-wing configuration.
Technological Innovations: Series Hybrid-Electric Propulsion
The core innovation driving the XRQ-73 is its series hybrid-electric propulsion system. Unlike parallel hybrid systems, where both a gas engine and an electric motor physically drive the aircraft’s propellers or fans, a series hybrid system operates differently. According to technical overviews of the program, the XRQ-73 uses a conventional fuel-burning gas turbine engine solely to generate electricity. This electrical power is then routed to electric motors that drive the aircraft’s propulsion.
This architecture allows the combustion engine to run continuously at its most efficient operating point, regardless of the aircraft’s airspeed or maneuvering requirements. The result is a highly efficient power generation cycle that extends the aircraft’s endurance.
Stealth and Advanced Payload Capabilities
Beyond fuel efficiency, the series hybrid-electric system offers profound tactical advantages. The electric propulsion motors are ultra-quiet, significantly reducing the aircraft’s acoustic signature. Furthermore, the system lowers the thermal (infrared) signature of the drone, making it much harder for adversary air defense systems to detect.
Additionally, because the gas turbine acts as a high-capacity flying generator, the XRQ-73 can produce substantial amounts of electrical power. This opens up new possibilities for integrating high-energy payloads directly into the aircraft’s systems. Future iterations could easily support power-hungry advanced sensors, electronic warfare (EW) jamming suites, or even directed energy weapons.
Flight Testing and Official Statements
While DARPA officially stated the first flight occurred in April 2026, metadata from released photographs suggests the exact date may have been April 14, 2026. The successful test at Edwards Air Force Base marks the beginning of a comprehensive flight-test campaign expected to run throughout the year.
In a statement regarding the successful flight, DARPA highlighted the broader implications of the technology:
“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.” — Lt. Col. Clark McGehee, DARPA SHEPARD Program Manager
Northrop Grumman also emphasized the operational flexibility the new propulsion system provides to the military:
“The XRQ-73’s innovative hybrid-electric propulsion system combines fuel efficiency, reduced emissions and enhanced operational flexibility, enabling new mission possibilities and supporting the evolution of new aircraft designs.” — Northrop Grumman Official Statement
AirPro News analysis
The successful first flight of the XRQ-73 highlights a critical pivot in the U.S. military’s approach to uncrewed aerial reconnaissance. As traditional, combustion-engine drones like the MQ-9 Reaper face increasing vulnerability to modern, sophisticated air defense networks, the Pentagon is actively seeking quieter, low-observable alternatives that can persist in semi-contested or denied airspaces.
We view the XRQ-73 not as a final production model, but as a vital technology demonstrator. Because it carries an “X” designation, its primary mission is to generate actionable flight data. The success of this series hybrid-electric architecture will likely dictate the design parameters for the next generation of stealthy, long-endurance ISR platforms fielded by the U.S. Air Force and allied branches in the 2030s.
Frequently Asked Questions
What is a Group 3 UAS?
According to U.S. Department of Defense classifications, a Group 3 Uncrewed Aircraft System (UAS) is a drone that typically weighs between 51 and 1,320 pounds, operates at altitudes between 3,500 and 18,000 feet, and flies at speeds ranging from 100 to 250 knots.
What is the difference between a series and parallel hybrid aircraft?
In a parallel hybrid system, both the combustion engine and the electric motor are mechanically connected to the propulsion system (e.g., the propeller) and can drive it simultaneously. In a series hybrid system, like the one used on the XRQ-73, the combustion engine only turns a generator to produce electricity. That electricity then powers separate electric motors that drive the aircraft.
Will the XRQ-73 be used in combat?
No. The XRQ-73 carries an “X-plane” designation, meaning it is an experimental technology demonstrator. It is designed to test and prove the viability of series hybrid-electric propulsion so that the technology can be integrated into future operational combat and reconnaissance aircraft.
Sources
Photo Credit: Northrop Grumman
Defense & Military
NGATS Adapted for Boeing AH-64E Apache Flightline Diagnostics
The U.S. Army and Boeing completed a 12-month NGATS pathfinder at Fort Rucker, reporting over $1M in cost avoidance on the AH-64E Apache.

The U.S. Army Aviation and Missile Command (AMCOM) and The Boeing Company have successfully adapted a ground-vehicle diagnostic system to service the Boeing AH-64E Apache helicopter, completing a 12-month operational pathfinder exercise at Fort Rucker, Alabama, that demonstrated significant reductions in sustainment costs.
Announced by the U.S. Army on May 12, 2026, the initiative utilized the Next Generation Automatic Test System (NGATS) to diagnose faults directly on the flightline. Historically used for ground vehicles like the Stryker and Abrams, the system’s expansion into aviation allows maintainers to avoid unnecessary depot shipments and limit demand on the global supply chain.
Adapting ground diagnostics for aviation readiness
The pathfinder exercise involved collaboration between AMCOM, Boeing, PAE Maneuver Air, and M1. The foundation for the exercise was laid on December 1, 2025, when Boeing Global Services upgraded NGATS capabilities to include the first aviation test program set. This upgrade enabled the system to interface with complex aviation electronics that previously required specialized, separate testing equipment.
The U.S. Army Aviation Center of Excellence at Fort Rucker provided a rigorous testing environment for the program. The installation conducts 40 percent of the Army’s aviation flight hours and operates the equipment equivalent of five combat aviation brigades. Testing the system under this high operational tempo allowed the Army to validate the diagnostic tool’s effectiveness in a realistic sustainment scenario.
During the 12-month exercise, the Army reported over $1 million in cost avoidance on a single component, the Aircraft Interface Unit, by utilizing NGATS alongside Boeing-developed test procedures.
“Leveraging existing technology like NGATS to its maximum effect is going to show real returns for Army aviation,” stated Col. Tim Harloff, Commander of the AMCOM Combined Logistics Command.
Long-term sustainment and future expansion
The Boeing AH-64E Apache is projected to remain in service into the 2060s, making long-term maintenance efficiency a priority for the Department of Defense. On January 2, 2026, the U.S. Army awarded Boeing a $2.73 billion contract for post-production support services for the Apache fleet through 2030. The integration of NGATS aligns with the objectives of this sustainment contract by streamlining repairs and reducing the logistical footprint required to keep the aircraft operational.
Following the success of the AH-64E Apache pathfinder exercise, Boeing plans to expand NGATS testing capabilities to additional aviation platforms, unmanned aircraft, and watercraft. Col. John Morris, Chief of Staff for AMCOM, noted the value of the joint effort, stating that the Army will see consistent wins when collaborating across industry partners.
AirPro News analysis
We view the successful integration of NGATS into the Boeing AH-64E Apache maintenance ecosystem as a critical step in the U.S. Army’s broader modernization strategy. By shifting diagnostic capabilities from centralized depots directly to the flightline, the military can significantly reduce aircraft downtime and alleviate pressure on an already strained aerospace supply chain. The $1 million cost avoidance on a single component suggests that scaling this technology across the broader aviation fleet could yield substantial financial and operational benefits over the lifecycle of these aircraft.
Sources: The Boeing Company
Photo Credit: Boeing
Defense & Military
Trump Flies Qatari-Gifted Boeing 747-8 as Interim Air Force One
President Trump completed his first flight on a retrofitted Qatari-donated Boeing 747-8 on July 1, 2026, as the VC-25B program faces delays until 2028.

This article summarizes reporting by CBS News by Kaia Hubbard, with additional reporting from the Associated Press and Military Times.
U.S. President Donald Trump completed his inaugural flight aboard a retrofitted Boeing 747-8 on July 1, 2026, utilizing an aircraft gifted to the United States by the Qatari government as a temporary Air Force One. The flight departed Joint Base Andrews in Maryland for Bismarck Municipal Airport in North Dakota, marking the operational debut of the interim presidential transport.
The introduction of the Qatari-donated aircraft serves as a bridge for the United States Air Force (USAF) executive airlift fleet. The permanent replacement program, designated VC-25B, is currently running four years behind schedule, with Boeing now expected to deliver the new jets in 2028. According to reporting by CBS News, the interim Boeing 747-8 allows the administration to supplement the aging VC-25A fleet, which consists of heavily modified Boeing 747-200 aircraft that are approximately 35 years old.
Aircraft modifications and new livery
The Qatari government gifted the luxury Boeing 747-8, valued at an estimated $400 million, to the United States in 2025. Following the transfer, the USAF spent just under $400 million to install necessary secure communications and defensive systems. While the original aircraft featured a highly customized VIP interior, military officials noted that the retrofitting process prioritized operational readiness. The interior layout remains minimally changed from its original luxury configuration.
Externally, the aircraft introduces a significant departure from the traditional light blue and white design that has characterized presidential aircraft for decades. The interim Air Force One sports a navy blue belly accented with red and gold stripes. The Associated Press reported that this specific color scheme aligns with design preferences Trump advocated for during his first term in office.
Prior to the July 1 flight, the USAF conducted a series of commissioning flights to validate the aircraft’s mission capability and finalize safety protocols. Military Times reported that these test flights were completed in late June 2026, clearing the jet for active presidential service.
Bridging the gap to the VC-25B
The necessity for an interim aircraft stems from ongoing delays in the VC-25B program. The U.S. government initially signed a contract with Boeing in 2018 for two new heavily modified Boeing 747-8 aircraft to replace the legacy VC-25A fleet. The manufacturer has faced persistent supply chain disruptions and a shortage of appropriately cleared personnel, pushing the delivery timeline to 2028.
Speaking about the interim aircraft, President Trump highlighted the unique nature of the acquisition. He described the Boeing 747-8 as potentially the greatest commercial plane ever built and acknowledged the Qatari government’s role in providing the jet. The president utilized the aircraft to travel to North Dakota for an event at the Theodore Roosevelt Presidential Library ahead of the nation’s 250th anniversary celebrations.
AirPro News analysis
The integration of a foreign-gifted aircraft into the highly secure presidential airlift fleet represents an unprecedented procurement path for the USAF. We view the rapid commissioning of this Boeing 747-8 as a pragmatic response to the severe delays plaguing the VC-25B program. By accepting and modifying an existing airframe, the military has effectively mitigated the operational risks associated with relying exclusively on the 35-year-old VC-25A fleet for another two years.
The decision to leave the luxury interior largely intact suggests a compromise between rapid deployment and standard military specifications. While the necessary secure communications and defensive countermeasures are in place, the non-standard interior and unique exterior livery will make this specific airframe a distinct, albeit temporary, chapter in the history of presidential aviation.
Sources: CBS News
Photo Credit: U.S. Air Force courtesy photo
Defense & Military
Saab Signs SEK 24.6B Gripen E Contract for Ukrainian Air Force
Saab AB finalizes a $2.5B deal to deliver 16 Gripen E fighters to Ukraine, with deliveries scheduled for 2029 to 2030.

Saab AB has finalized a SEK 24.6 billion contracts with the Swedish Defence Materiel Administration (FMV) to manufacture and deliver 16 Saab Gripen E fighter aircraft destined for the Ukrainian Air Force.
The agreement, signed on June 30, 2026, formalizes a bilateral defense commitment between Sweden and Ukraine and schedules aircraft deliveries for the 2029 to 2030 timeframe, according to a press release issued by the manufacturers.
Contract details and delivery timeline
The orders, valued at approximately $2.5 billion USD, includes the 16 airframes alongside spare parts and associated support equipment. Saab stated it will officially book the order in the third quarter of 2026. Manufacturing and initial deliveries will take place in Sweden, with the FMV receiving the aircraft before their subsequent transfer to Ukraine.
The Saab Gripen E is designed for operational resilience and dispersed operations. The Military-Aircraft can take off and land on short stretches of public roads or temporary runways. This capability aligns with the operational requirements of the Ukrainian Air Force amid ongoing threats to traditional airbase infrastructure.
Saab President and CEO Micael Johansson stated the agreement will provide a critical capability upgrade for the operator.
“I am deeply proud that Sweden and Saab can now enable the provision of Gripen E to Ukraine, bringing a world-class fighter that will transform the Ukrainian Air Force’s capability. This will significantly strengthen Ukraine’s air defence and help ensure the nation can protect its people and safeguard its future,” Johansson said.
Bilateral defense agreements and interim capabilities
The formal contract follows a May 28, 2026, announcement made in Uppsala, Sweden. During that meeting, Swedish Prime Minister Ulf Kristersson and Ukrainian President Volodymyr Zelenskyy outlined a broader air defense cooperation plan between the two nations.
Ukraine initially stated its intent to acquire up to 20 Saab Gripen E/F aircraft, of which 16 are now firmly contracted. To provide an interim capability boost while the newly ordered Gripen E models are manufactured, the Swedish government previously announced its intent to donate 16 older Saab Gripen C/D aircraft to Ukraine.
AirPro News analysis
The formalization of the Saab Gripen E contract represents a major shift in Western defense procurement for Ukraine, moving from the donation of legacy airframes to the direct commissioning of newly manufactured, advanced fighter aircraft. We view the 2029 to 2030 delivery window as an indicator that European defense planners are structuring support for the Ukrainian Air Force as a long-term modernization effort rather than strictly an immediate wartime stopgap. The Gripen E’s specific design parameters, particularly its low maintenance footprint and ability to conduct dispersed operations from austere locations, make it uniquely suited to the threat environment in Eastern Europe.
Sources: Saab AB
Photo Credit: SAAB
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