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Archer and Karem Collaborate on Hybrid Military VTOL Aircraft

Archer Aviation teams with Karem Aircraft to develop a hybrid-electric VTOL using military-grade tiltrotor tech for defense and long-range missions.

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This article is based on an official press release from Archer Aviation. See the original release for full details.

Archer Aviation and Karem Aircraft Partner for Next-Gen Hybrid Military VTOL

Archer Aviation has announced an exclusive collaboration with Karem Aircraft to develop a next-generation hybrid-electric vertical takeoff and landing (VTOL) aircraft. According to the company’s official statement, this partnership aims to integrate Karem’s military-grade Optimum Speed Tiltrotor (OSTR) technology into a new platform designed specifically for defense applications and long-range commercial missions.

This agreement marks a significant expansion of Archer’s strategic focus. While the company continues to certify its all-electric “Midnight” air taxi for urban mobility, this new initiative targets the high-performance requirements of the U.S. military. By combining Archer’s electric powertrain and manufacturing capabilities with Karem’s advanced rotor designs, the companies intend to deliver a “dual-use” aircraft capable of speeds, ranges, and payloads that exceed the limits of current battery-only technology.

Integrating Military-Grade Rotor Technology

The centerpiece of this collaboration is the integration of Karem Aircraft’s proprietary Optimum Speed Tiltrotor (OSTR) technology. Traditional tiltrotors often face aerodynamic compromises, requiring a balance between the high rotor speeds needed for vertical lift and the lower speeds preferred for efficient forward flight. According to the technical details released regarding the partnership, OSTR solves this by allowing rotors to vary their RPM significantly between flight modes.

Performance and Efficiency Gains

By utilizing OSTR, the proposed aircraft can maintain high RPM for hover and switch to lower RPM for quiet, efficient cruise flight. The press release notes that this technology has already been validated by the U.S. Army through the Joint Multi-Role Technology Demonstration (JMR-TD) program. The expected benefits include higher top speeds, extended range through improved fuel efficiency, and a reduced acoustic signature, a critical factor for operating in contested military airspace.

The “Technology Stack” Strategy

This collaboration is part of a broader strategy by Archer to assemble a coalition of defense-focused technologies. The new platform will reportedly combine three distinct layers of innovation:

  • Aeromechanics: Karem Aircraft’s OSTR technology.
  • Autonomy: Mission systems provided by Anduril Industries, a recent Archer partner.
  • Powertrain & Production: Archer’s high-volume manufacturing and electric propulsion systems.

A Distinct Platform: Beyond the Midnight

While Archer’s flagship “Midnight” aircraft is designed for short urban hops of approximately 20 to 50 miles, the new hybrid platform represents a separate product line tailored for heavy logistics and tactical utility. The company indicates that the U.S. military requires “runway-independent” logistics capabilities that battery-electric aircraft cannot currently fulfill due to energy density limitations.

Hybrid Propulsion for Heavy Payloads

To meet these rigorous demands, the new aircraft will utilize a hybrid-electric propulsion system, employing a turbine generator to power electric motors. This configuration offers the vertical agility of a helicopter combined with the range and speed of a fixed-wing airplane. According to the announcement, the targeted payload for this military-focused aircraft is between 1,200 and 2,000+ pounds, significantly higher than the passenger capacity of the Midnight air taxi.

“The U.S. military (specifically the Army) has identified that battery-only eVTOLs lack the range and endurance for tactical logistics and rescue missions.”

AirPro News Analysis

The inclusion of Karem Aircraft adds substantial engineering pedigree to Archer’s defense ambitions. Founded by Abe Karem, widely known in the industry as the “Dronefather” for his creation of the Predator drone, Karem Aircraft has a history of developing high-efficiency designs like the A160 Hummingbird. For Archer, this partnership likely serves to de-risk its entry into the defense sector by leveraging proven military tech. Furthermore, the shift toward hybrid propulsion acknowledges a pragmatic reality: while all-electric solutions suit urban air mobility, the energy requirements of military logistics and long-range transport still demand the energy density of fuel-based hybrid systems.

Strategic Implications for Defense

The collaboration explicitly targets operations in “contested environments.” The ability to fly low, fast, and quiet is essential for evading radar and acoustic detection. By leveraging electric motors for quiet operations and OSTR for speed, the companies aim to fill a capability gap for the military, providing a logistics platform that does not rely on vulnerable runways.

While the immediate focus remains on defense contracts, Archer has characterized the platform as “dual-use.” This suggests that the hybrid technology developed for the Pentagon could eventually be adapted for commercial markets, potentially serving regional routes that are too long for battery-electric air taxis but too short for traditional commercial jets.

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Photo Credit: Archer

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Defense & Military

Sikorsky and Safran Sign Propulsion Deal at Farnborough 2026

Sikorsky and Safran Helicopter Engines formalize a strategic propulsion agreement at Farnborough 2026, backed by a 40-year partnership.

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Sikorsky and Safran Helicopter Engines signed a strategic collaboration agreement on July 22, 2026, at the Farnborough International Airshow to jointly develop power and propulsion technologies for next-generation vertical lift platforms.

Announced in a Lockheed Martin press release, the agreement builds upon a 40-year relationship between the two aerospace manufacturers. The partnership aims to accelerate design cycles, shorten proposal turnaround times, and deliver higher-performance propulsion solutions for both commercial and defense rotorcraft markets worldwide.

Deepening a four-decade propulsion partnership

The formal agreement extends a long-standing industrial relationship centered on the Sikorsky S-76 medium helicopter. Safran has delivered more than 1,230 engines for the S-76 program, accumulating nearly 10 million flight hours across the global fleet.

Cédric Goubet, President of Safran Helicopter Engines, noted the shared history between the companies and emphasized the potential for future integration.

“As the world leader in helicopter propulsion and pioneer of hybrid-electric propulsion, our products and services would provide an unrivalled competitive advantage for Sikorsky’s future helicopters,” Goubet stated.

European expansion and next-generation platforms

The propulsion agreement aligns with Sikorsky’s broader strategy to expand its industrial footprint in Europe. On July 20, 2026, Lockheed Martin confirmed that Sikorsky is actively pursuing the establishment of a Next Generation Rotorcraft (NGRC) production line in Europe to deepen its partnership with North Atlantic Treaty Organization (NATO) allies.

Rich Benton, Vice President and General Manager of Sikorsky, framed the Safran partnership as a critical component of this international strategy. Benton stated that collaborating across the industry from the initial design phase empowers customers with faster decision-making and confidence in the final aircraft’s performance and safety.

The push for advanced propulsion coincides with Sikorsky’s ongoing development of autonomous and uncrewed platforms. Also on July 22, 2026, the manufacturer announced the completion of initial ground and flight testing for its Nomad 100 uncrewed aerial system (UAS), developed for the Defense Advanced Research Projects Agency (DARPA) EVADE program.

AirPro News analysis

We view the formalization of the Sikorsky and Safran partnership as a strategic positioning move for the NATO NGRC program. By aligning with a major European propulsion provider, Sikorsky strengthens its industrial base across the Atlantic, which is often a prerequisite for winning major European defense contracts. Safran’s ongoing research into hybrid-electric aviation also provides Sikorsky with a ready pathway to integrate advanced, fuel-efficient powerplants into future uncrewed and crewed vertical lift designs without bearing the entire research and development cost internally.

Sources: Lockheed Martin

Photo Credit: Lockheed Martin

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Defense & Military

BAE Systems Unveils Brontanax UK Autonomous Combat Aircraft

BAE Systems and the UK MoD unveiled Brontanax, the UK’s first uncrewed CCA, at Farnborough 2026.

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BAE Systems and the United Kingdom Ministry of Defence (MoD) unveiled Brontanax, the nation’s first uncrewed autonomous Collaborative Combat Aircraft (CCA), at the Farnborough International Airshow on July 22, 2026. The five-metric-ton aircraft is designed to operate alongside crewed fighter jets, providing electronic warfare and precision strike capabilities to the fleet.

According to a BAE Systems press release, the platform serves as the manufacturers offering for the UK government’s £300 million Storm Fighter program. The initiative aims to establish the Royal Air Force (RAF) as Europe’s first sixth-generation air force by integrating uncrewed systems with existing crewed fighters like the Eurofighter Typhoon and the Lockheed Martin F-35 Lightning II.

The Storm Fighter program and development timeline

Development of the Brontanax platform began internally at BAE Systems in 2022. The manufacturer has invested approximately £300 million to date to fund the project. The UK government formalized its financial backing on July 1, 2026, through its Defence Investment Plan, committing an initial £300 million to the sovereign autonomous combat air initiative.

UK Defence Secretary Wes Streeting highlighted the strategic importance of the platform during the unveiling event at Farnborough, noting the government’s intent to adopt the aircraft as an operational concept demonstrator.

“The unveiling of Brontanax, the UK’s first uncrewed autonomous Collaborative Combat Aircraft, is a testament to the extraordinary talent and innovation across our sovereign defence industry. Built at BAE Systems in Warton by British engineers, backed by British businesses large and small, this aircraft demonstrates that the UK has the skills, the technology and the determination to lead the world in combat air power.”

The prototype is scheduled for its first power-up in the third quarter of 2026. Ground trials are slated to begin in the first half of 2027, followed by flight trials in UK airspace in the second half of the year. The RAF plans to bring the aircraft into service before 2030.

Industrial footprint and supply chain realities

The Brontanax program currently involves more than 500 BAE Systems employees and engages over 75 UK companies and small-to-medium enterprises. The aircraft was designed and built at the BAE Systems facility in Warton, Lancashire.

While marketed as a sovereign British aircraft, the initial iterations of the drone utilize a US-made Williams International engine. BAE Systems and the RAF intend to transition to a British powerplant developed by Rolls-Royce for future production models.

Air Chief Marshal Sir Harv Smyth, Chief of the Air Staff, stated that the RAF is working closely with the manufacturer to meet the aggressive development schedule, confirming that a prototype is expected to fly next year.

AirPro News analysis

The unveiling of Brontanax signals the United Kingdom’s formal entry into the highly competitive CCA market. We are seeing a global surge in the development of these uncrewed systems, with aerospace manufacturers including Airbus, Boeing, Anduril, and General Atomics competing for contracts across multiple allied nations.

The primary driver behind this shift is combat mass. Traditional crewed fighters are highly capable but expensive to procure and operate. A large CCA is estimated to cost approximately 25 percent of a traditional crewed fighter. By pairing uncrewed systems with crewed jets, air forces can significantly expand their tactical footprint, sensor networks, and weapons capacity without a proportional increase in procurement budgets or pilot training requirements. The transition from the Williams International engine to a Rolls-Royce powerplant will be a critical milestone to watch as the UK attempts to secure a fully sovereign supply-chain for the Storm Fighter program.

Sources: BAE Systems Press Release

Photo Credit: BAE Systems

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Defense & Military

GE Aerospace and Shield AI Complete X-BAT Engine Test

GE Aerospace and Shield AI complete AVEN thrust-vectoring nozzle testing on the F110-GE-129E, keeping X-BAT on track for late 2026 first flight.

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GE Aerospace and Shield AI have successfully completed integration, actuation, and engine light-off testing of a multi-axis thrust-vectoring nozzle on an F110-GE-129E engine, clearing a major propulsion hurdle for the X-BAT vertical take-off and landing combat aircraft.

Announced in a July 20, 2026, press release, the testing took place at GE Aerospace’s operations site in Peebles, Ohio. The campaign represents the first fully integrated test of the Axisymmetric Vectoring Exhaust Nozzle (AVEN) hardware and control systems since its original development in the 1990s. The successful light-off keeps the X-BAT program on schedule for a planned first flight in late 2026.

Resurrecting thrust vectoring for vertical flight

The AVEN system pivots engine exhaust in three dimensions, providing the precise directional control required for the aircraft to balance on its tailpipe during vertical takeoff and landing (VTOL) maneuvers. Originally designed in the 1990s, the AVEN program accumulated 73 hours of ground testing and 135 flight hours across 95 flights on an experimental F-16 before being shelved.

Shield AI and GE Aerospace are now adapting that legacy hardware to meet the demands of modern autonomous flight. The integration requires the nozzle to execute rapid, coordinated movement sequences driven by Shield AI’s flight control software.

“The AVEN is what makes vertical flight possible on a platform this size and this capable. We’re applying it differently than it was ever used before. Vertical flight requires fast gimbaling to maintain attitude control, a demand the original program never had to meet,” said Armor Harris, Senior Vice President of Aircraft Engineering at Shield AI.

Harris noted that utilizing hardware with a proven track record allowed the engineering teams to bypass the initial stages of clean-sheet development. The next phase of the program will focus on iterating the propulsion approach to reduce weight and increase speed for future variants.

Scaling the X-BAT for contested environments

Shield AI unveiled the X-BAT in Washington, D.C., on October 21, 2025. The aircraft is designed as a Collaborative Combat Aircraft (CCA) capable of operating independently or as a drone wingman in contested airspace. By November 5, 2025, Shield AI and GE Aerospace had signed a Memorandum of Understanding to collaborate on the platform’s propulsion, selecting the F110-GE-129 engine paired with the AVEN system.

The aircraft relies on Shield AI’s Hivemind autonomy software to conduct missions without traditional runway infrastructure. According to reporting by Tectonic Defense, the X-BAT measures 26 feet in length and features a 39-foot wingspan. Naval News estimates the platform will achieve a range exceeding 2,000 nautical miles and an operational ceiling of 50,000 feet, positioning it for both austere land bases and potential naval integration.

Amy Gowder, President and CEO of Defense & Systems at GE Aerospace, stated that pairing the company’s propulsion scaling experience with Shield AI’s vehicle development allows the program to move rapidly from concept to fielded capability.

AirPro News analysis

We view the successful light-off of the AVEN-equipped F110 as a validation of Shield AI’s strategy to integrate mature subsystems rather than developing bespoke hardware. The GE Aerospace F110 engine family has accumulated 11 million flight hours. By pairing a highly reliable, mass-produced core engine with a previously flight-tested 3D vectoring nozzle, the X-BAT program significantly reduces its technical risk profile.

The primary challenge moving forward will be software integration. While the AVEN hardware is proven, the 1990s-era actuators were not designed for the continuous, high-frequency gimbaling required to stabilize a tail-sitting VTOL aircraft in turbulent conditions. Shield AI’s Hivemind system will need to manage these actuation limits carefully to prevent mechanical fatigue while maintaining attitude control during the critical transition between vertical and forward flight.

Sources: GE Aerospace

Photo Credit: GE Aerospace

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