Technology & Innovation
Airbus Tests Open Fan Engine for 20% Fuel Efficiency Gains
Airbus and CFM International advance open fan engine technology to reduce aviation emissions, with wind tunnel tests completed and flight trials planned by 2030.

Testing the Open Fan’s Promise: A New Era in Aircraft Propulsion
The aviation industry stands at a crossroads where innovation must align with sustainability. As global air traffic continues to rebound and environmental regulations tighten, the demand for cleaner, more efficient propulsion systems has never been greater. Among the most promising technologies is the open fan engine, a novel concept that blends the fuel efficiency of turboprops with the high-speed capabilities of turbofans.
Airbus, in collaboration with CFM International, is spearheading the development and testing of an open fan demonstrator as part of CFM’s RISE (Revolutionary Innovation for Sustainable Engines) program. This initiative aims to reduce fuel consumption and CO2 emissions by at least 20% compared to current best-in-class engines. Through rigorous wind tunnel testing and engineering simulations, Airbus is exploring the aerodynamic, acoustic, and integration challenges of this next-generation propulsion system.
With the first phase of wind tunnel tests complete and flight testing on the horizon, the open fan engine could soon redefine how aircraft are powered, and how the industry meets its net-zero emissions goals by 2050.
Understanding the Open Fan Architecture
What Is an Open Fan Engine?
The open fan engine, also referred to as an unducted fan or open rotor, represents a hybrid between turboprop and turbofan technologies. Unlike conventional turbofans, which encase their fan blades within a nacelle, the open fan architecture exposes the blades to open air. This configuration allows for larger diameter fans that rotate at slower speeds, increasing propulsive efficiency and reducing fuel consumption.
Historically, open fan designs were explored in the 1970s and 1980s, but noise and integration challenges hindered their adoption. Today, advancements in materials, aerodynamics, and acoustic modeling have revived interest in this technology. Airbus and CFM’s current demonstrator leverages these developments to address the limitations of earlier designs.
The open fan engine is engineered to deliver up to 20% better fuel efficiency compared to modern turbofans. This makes it a compelling option for future single-aisle aircraft, where fuel economy and emissions reductions are critical to long-term sustainability goals.
“The open fan represents a leap forward in propulsion technology, offering a realistic path to significantly reduce aviation’s carbon footprint while maintaining the performance and reliability our customers expect.” — Michael Schoellhorn, CEO, Rolls-Royce
Wind Tunnel Testing: Validating the Concept
Before any flight testing can commence, the open fan demonstrator must undergo extensive wind tunnel testing. Airbus and CFM have partnered with French aerospace lab ONERA and the Dutch-German DNW facility to conduct these tests. Two scale models, a 1:5.5 for high-speed and a 1:7 for low-speed testing, are used to simulate real-world aerodynamic and acoustic conditions.
The high-speed tests at ONERA, conducted in early 2024, focused on installation effects and propeller performance. Meanwhile, the low-speed tests at DNW from September to November 2024 examined aero-acoustic behavior during take-off and landing scenarios. These tests also evaluated interactions with high-lift devices like flaps and slats.
One of the key challenges for open fan engines is noise. Because the engine lacks a nacelle, the rotor blades are exposed, increasing the acoustic footprint. To mitigate this, engineers are exploring new blade designs and noise-reducing technologies to ensure compliance with international certification standards.
Integration and Compatibility with Sustainable Fuels
Beyond aerodynamic performance, the open fan engine must be compatible with alternative energy sources. The RISE program is designed not only to reduce fuel burn but also to ensure that the engine can operate on sustainable aviation fuels (SAF) and potentially hydrogen. This flexibility is crucial as the industry diversifies its energy sources to meet carbon-neutral targets.
Airbus emphasizes that propulsion systems must align with broader design goals, including reduced aircraft weight and improved aerodynamics. The open fan’s integration into future airframes will be a key factor in determining its commercial viability. Engineers are currently working on full-aircraft models (1:11 and 1:14 scale) to be tested in 2026 at ONERA and Airbus’ Filton facility in the UK.
These tests will simulate full-scale interactions between the engine and the aircraft body, providing critical data for optimizing design and performance. The ultimate goal is to mount a fully operational open fan engine on an Airbus A380 testbed by the end of the decade, marking a significant milestone in aviation propulsion history.
Industry Implications and Future Outlook
Environmental and Economic Impact
The aviation sector is under increasing pressure to reduce greenhouse gas emissions. Regulatory frameworks such as CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) and the EU Emissions Trading System are pushing airlines and manufacturers to adopt cleaner technologies. The open fan engine offers a tangible path toward these goals, with potential fuel savings of 20–30% compared to current engines.
These efficiency gains translate into substantial cost savings for airlines. With jet fuel prices hovering between $2.50 and $3.00 per gallon in 2024, a 20% reduction in fuel burn could save millions of dollars per aircraft annually. This economic incentive, combined with environmental benefits, makes the open fan a compelling option for next-generation fleets.
Moreover, the open fan complements other sustainability initiatives, such as SAF adoption, hybrid-electric propulsion, and advanced aerodynamics. Together, these technologies form a multi-pronged strategy to meet the aviation industry’s 2050 net-zero targets.
“Our open fan testing confirms that we can deliver the fuel efficiency of turboprops with the speed and comfort of turbofans, marking a breakthrough in sustainable aviation.” — Grazia Vittadini, Chief Technology Officer, Airbus
Challenges and Ongoing Research
Despite its promise, the open fan engine faces several hurdles. Noise remains a primary concern, especially for communities near airports. While blade design innovations have made strides, achieving certification-level noise compliance is still a work in progress.
Integration with existing aircraft designs is another challenge. The exposed rotors require new mounting strategies, structural reinforcements, and aerodynamic adjustments. These changes must be balanced against weight and drag penalties that could offset fuel savings.
Ongoing research is focused on refining blade aerodynamics, enhancing acoustic treatments, and exploring hybrid-electric configurations. These efforts are supported by initiatives like the European Clean Aviation framework and the Clean Sky 2 program, which provide funding and collaborative platforms for innovation.
Conclusion
The open fan engine marks a bold step forward in the quest for sustainable aviation. By combining the strengths of turboprops and turbofans, it offers a unique solution to the twin challenges of fuel efficiency and environmental compliance. Airbus and CFM’s ongoing testing efforts are laying the groundwork for a new generation of aircraft that could enter service in the 2030s.
As the industry pushes toward net-zero emissions, technologies like the open fan will play a pivotal role. While challenges remain, the progress made so far signals a promising future where performance and sustainability are no longer at odds, but part of the same flight path.
FAQ
What is an open fan engine?
An open fan engine is an unducted propulsion system that uses large, exposed fan blades to improve fuel efficiency and reduce emissions compared to traditional turbofan engines.
How much fuel can an open fan engine save?
Current estimates suggest a 20–30% reduction in fuel consumption compared to the most advanced turbofan engines in service today.
When will open fan engines be used in commercial aircraft?
Airbus plans to conduct flight testing by the end of the decade, with potential entry into service for next-generation aircraft in the 2030s.
Sources: Airbus, CFM International, IATA, U.S. Energy Information Administration
Photo Credit: Airbus
Technology & Innovation
Japan Airlines Deploys Electric Aircraft Washing Robot at Narita
JAL will deploy the Aerowash AW3 robot at Tokyo Narita in 2026, cutting wash times 40% and water use 50%.

Japan Airlines (JAL) will deploy a fully electric, remote-controlled aircraft washing robot at Tokyo Narita International Airport (NRT) later in 2026, a move projected to cut aircraft cleaning times by up to 40 percent and water consumption by half.
In a press release issued on August 28, 2026, the JAL Group announced the introduction of the Aerowash Remote-Controlled Aircraft Washing Robot (AW3), manufactured by Swedish firm Aerowash AB. The deployment marks the first time a domestic airline in Japan has implemented a program-controlled collaborative robot for aircraft exterior cleaning. The initiative aims to improve occupational health and safety for ground staff while reducing the environmental footprint of ground handling operations.
Operational efficiency and environmental impact
The AW3 is fully electric and battery-powered, eliminating direct exhaust emissions on the ramp during operation. According to the JAL Group, the automated system can reduce the time required to wash an aircraft by up to 40 percent compared to traditional manual methods. The robot is also expected to decrease water usage per aircraft by up to 50 percent.
Aviation Week reported that the AW3 system is compatible with several aircraft types in the Japan Airlines fleet, including the Boeing 737, Boeing 767, Boeing 787, and Airbus A350. Full-scale implementation at Narita is scheduled for late 2026 following comprehensive operational training for ground handling staff.
Labor strategy and Automation history
The aviation industry is increasingly turning to automated ground support equipment to mitigate labor shortages and improve turnaround times. Atsuki Kino of the Japan Airlines Airport Ground Handling Planning Department told The Straits Times that the primary objective is workload reduction rather than workforce elimination.
“The goal is not to reduce staff, but to reduce their workloads so they can use the time saved to perform other high-value tasks, changing the way they work,” Kino said.
The AW3 mitigates physical strain and chemical exposure for ground crews who previously conducted exterior washing manually. This is not the airline’s first attempt at automating exterior cleaning. According to Aviation Week, Japan Airlines tested a wired remote-controlled washing system in the 1990s. That initiative was ultimately abandoned due to technical limitations of the era, making the AW3 deployment a successful return to a concept first explored approximately 30 years ago.
AirPro News analysis
The introduction of the Aerowash AW3 by Japan Airlines highlights a broader industry shift toward electrifying and automating ground support equipment. As airlines face persistent global shortages in ground handling personnel, technologies that reduce physical fatigue and chemical exposure become critical retention tools. We expect to see similar collaborative robotics adopted across major Asian and European hubs over the next five years, particularly as Sustainability mandates force operators to scrutinize water consumption and ramp emissions. The 30-year gap between JAL’s initial wired prototype and the AW3 underscores how recent advancements in battery density and spatial programming were required to make automated aircraft washing commercially viable.
Sources: JAL Group
Photo Credit: JAL Group
Sustainable Aviation
KBR PureSAF Technology Selected for Kazakhstan First SAF Plant
KBR licenses PureSAF technology for Kazakhstan’s first SAF facility, using an alcohol-to-jet process with domestic feedstocks.

Global engineering firm KBR announced on August 24, 2026, that it secured a contracts to license its proprietary PureSAF technology and provide engineering design for Kazakhstan’s inaugural Sustainable Aviation Fuel (SAF) production facility. The project, developed in partnership with KazMunayGas-Aero LLP (KMG-Aero) and KazFoodProducts (KFP), will utilize domestic agricultural feedstocks to produce low-carbon aviation fuel via an alcohol-to-jet (AtJ) process.
In a press release detailing the contract award, KBR confirmed the agreement supports Kazakhstan’s strategic objective to establish itself as an international aviation hub while advancing aviation decarbonization. The planned facility will leverage technology developed in collaboration with Swedish Biofuels AB to convert ethanol into drop-in aviation fuel.
Technology and Project Scope
The facility will utilize KBR’s PureSAF technology, an alcohol-to-jet pathway designed to process agricultural feedstocks into sustainable aviation fuel. The foundational trilateral agreement covering the Process Design Package (PDP) and technology licensing was signed by KBR, KMG-Aero, and KFP in Astana on July 23, 2026. KBR, which employs approximately 37,000 people and operates in 28 countries, will provide the engineering framework required to scale the AtJ process for commercial output.
KBR Sustainable Technology Solutions President Jay Ibrahim stated the company is honored to support the national commitment to reduce greenhouse gas emissions.
“KBR’s PureSAF is a feed-flexible, bankable technology that is designed to deliver high SAF yields and supports the project across the full lifecycle. We look forward to closely collaborating and supporting the successful execution of this landmark SAF project,” Ibrahim said.
Kazakhstan’s Aviation Decarbonization Strategy
The KBR contract follows a series of government initiatives aimed at building a domestic SAF supply chain. On August 4, 2026, Kazakh Prime Minister Olzhas Bektenov and Dr. Peter Lee of Hong Kong-based Full Vision Capital signed a memorandum of understanding to explore creating a green aviation fuel ecosystem in the city of Alatau. This proposed ecosystem would cover the full production cycle, from cultivating agricultural feedstock to manufacturing the finished product.
These infrastructure investments align with recommendations from global aviation regulators and industry groups. In April 2026, the International Air Transport Association (IATA) emphasized that continued investment in SAF, alongside new airport infrastructure, is critical for Kazakhstan to capitalize on global passenger and cargo traffic and strengthen its domestic aviation sector.
AirPro News analysis
The KBR contract award represents a concrete technical step in Kazakhstan’s ambition to localize SAF production, but several commercial variables remain undefined. The August 24 announcement did not disclose the financial value of the engineering contract, the projected production capacity of the facility, or a target completion date. We note that while the alcohol-to-jet pathway is a proven method for SAF production, scaling agricultural feedstock supply-chain domestically will be critical to the plant’s long-term viability. The parallel involvement of Full Vision Capital suggests the government is actively working to finance and structure this agricultural supply chain in the Alatau region to ensure the KBR-designed facility has the necessary inputs to operate at scale.
Sources: KBR
Photo Credit: Montage
Technology & Innovation
Boeing and GM Complete Sale of HRL Laboratories to IBM
Boeing and GM finalized the sale of HRL Laboratories to IBM on August 25, 2026, supporting Boeing’s refocus on core aerospace operations.

The Boeing Company and General Motors Company have finalized the sale of their jointly owned research facility, HRL Laboratories, to International Business Machines Corporation (IBM), a divestment that allows the aerospace and automotive manufacturers to redirect resources toward their primary industrial operations.
The transaction transfers ownership of the Malibu, California-based research center, which Boeing and GM previously held in a 50/50 joint venture. The companies initially announced the acquisition agreement on July 23, 2026. Boeing and GM confirmed the completion of the sale in a press release on August 25, 2026, followed by IBM’s official confirmation on August 26. Financial terms of the Acquisitions were not disclosed.
Strategic realignment for Boeing and GM
For Boeing, the sale of HRL Laboratories aligns with a broader corporate Strategy to streamline operations and concentrate capital on its core commercial airplanes, defense, and space divisions. HRL Laboratories was founded in 1948 and has historically provided advanced physical science and engineering research for its parent companies.
In a joint statement, Boeing and GM indicated that they will maintain a working relationship with the laboratory under its new ownership to support their respective technological needs.
“Since its founding in 1948, HRL Laboratories has been a leader in pioneering work in physical science and engineering, and we look forward to IBM building on this legacy. While Boeing and GM will continue to partner with IBM and HRL on quantum applications and advanced technology development, our companies will focus our resources on our respective core businesses and delivering the programs and services necessary to meet our customers’ evolving needs.”
IBM accelerates quantum hardware roadmap
The acquisition provides IBM with HRL’s expertise in silicon-spin qubits, quantum sensing, and advanced materials. IBM plans to integrate these technologies into its dual-track hardware strategy, combining its existing superconducting circuits with HRL’s silicon quantum dot research.
This integration supports the development of the IBM Quantum Starling, a fault-tolerant quantum computer projected to perform 100 million quantum operations by 2029.
Jay Gambetta, Director of Research and IBM Fellow, noted in a company statement that the HRL team brings a broad portfolio of technologies that will strengthen IBM’s long-term plans to deliver useful quantum computing. Gambetta stated the acquisition brings together advances across quantum computing, sensing, and networking.
Rob Vasquez, President and Chief Executive Officer of HRL Laboratories, described the acquisition as the natural next chapter for the facility, noting the team’s dedication to exploring how future quantum computers could be built at unprecedented scales.
AirPro News analysis
We view Boeing’s divestment of HRL Laboratories as a pragmatic step in its ongoing effort to stabilize and refocus its core aerospace Manufacturing businesses. While quantum computing and advanced materials research hold long-term promise for aerospace applications, maintaining a 50 percent stake in a dedicated research laboratory requires capital and management bandwidth that Boeing currently needs for its Commercial-Aircraft production and certification programs. By transitioning from an owner to a partner, Boeing retains access to HRL’s quantum advancements without the financial overhead of managing the joint venture.
Sources: The Boeing Company
Photo Credit: HRL Laboratories
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