Technology & Innovation
NASA Completes High-Speed Taxi Test of CATNLF Wing Design
NASA’s CATNLF wing design taxi test at Armstrong Center shows potential for up to 10% fuel savings in commercial aviation.
This article is based on an official press release from NASA.
NASA has successfully completed a critical high-speed taxi test of a new wing design technology aimed at significantly reducing fuel consumption in Commercial-Aircraft. The testing, conducted at the NASA Armstrong Flight Research Center in Edwards, California, focused on the Crossflow Attenuated Natural Laminar Flow (CATNLF) concept. According to the agency, this technology has the potential to reduce fuel burn by up to 10 percent for large transport aircraft.
The milestone event, which took place on January 12, 2026, involved a scale model wing mounted to a specialized research aircraft. This ground-based testing serves as a precursor to upcoming Test-Flights scheduled for the coming weeks. By validating the structural integrity and instrumentation of the test article on the ground, NASA aims to ensure safety and data accuracy before the technology takes to the skies.
The recent tests utilized NASA’s McDonnell Douglas F-15B Research Testbed (Tail No. 836). Instead of modifying the jet’s own wings, engineers mounted a 3-foot-tall scale model of the CATNLF wing vertically on a Centerline Instrumented Pylon (CLIP) located underneath the F-15B’s fuselage. This configuration allows researchers to expose the model to realistic airflow conditions without altering the host aircraft’s aerodynamics.
During the January 12 event, the aircraft reached speeds of approximately 144 mph on the runway. The primary objective was to verify that the model could withstand the physical stresses of high-speed travel and that its extensive suite of sensors was functioning correctly. NASA reports that the taxi tests were successful, clearing the path for initial flight testing.
To capture the complex physics of airflow, the test article is heavily instrumented. According to technical data released by the agency, the model features:
Additionally, an infrared (IR) camera mounted on the F-15B provides real-time thermal imaging, offering a visual map of how air flows over the wing surface.
The core of this research addresses a specific aerodynamic challenge known as “crossflow instability.” Modern commercial airliners utilize swept wings to fly efficiently at high speeds. However, this sweep angle naturally generates turbulence, or crossflow, near the wing’s leading edge. This turbulence disrupts the smooth, laminar flow of air, increasing drag and forcing engines to burn more fuel.
CATNLF (Crossflow Attenuated Natural Laminar Flow) offers a passive solution to this problem. Rather than using heavy, complex mechanical systems to suck away turbulent air (known as active laminar flow), CATNLF relies on a specific reshaping of the wing’s airfoil. By altering the pressure gradients on the leading edge, the design dampens crossflow instabilities naturally. The current physical testing is grounded in extensive computational research. A NASA study conducted between 2014 and 2017 applied the CATNLF design method to a Common Research Model (CRM), which represents a modern wide-body airliner similar to a Boeing 777.
“A NASA computational study conducted between 2014 and 2017 estimated that applying a CATNLF wing design to a large, long-range aircraft like the Boeing 777 could reduce fuel burn by 5 to 10 percent.”
, NASA Press Release
The study utilized advanced flow solvers to simulate flight conditions, finding that the design could achieve laminar flow over approximately 60 percent of the wing’s upper surface. If applied to a global fleet of wide-body aircraft, a 5 to 10 percent reduction in fuel consumption would translate to millions of dollars in savings and a substantial decrease in carbon emissions.
While much of the recent media attention on Sustainability aviation has focused on the X-66A Transonic Truss-Braced Wing (TTBW), the CATNLF project represents a vital, complementary track of research. The X-66A relies on a radical structural change, long, thin wings supported by trusses, to achieve efficiency. In contrast, CATNLF focuses on airfoil optimization that could potentially be applied to various wing configurations, including standard tube-and-wing designs or the TTBW itself.
We observe that the distinction between “active” and “passive” laminar flow is crucial for Manufacturers. Active systems add weight and maintenance complexity, which Airlines generally oppose. By pursuing a passive geometric solution, NASA is targeting a “sweet spot” of high efficiency with minimal operational penalties, increasing the likelihood of adoption by airframers like Boeing or Airbus in the next generation of aircraft.
What is the main goal of the CATNLF project? How does this differ from other laminar flow technologies? When will this technology fly? What aircraft is being used for the tests? Sources: NASA Press Release
High-Speed Taxi Testing Details
Technical Specifications and Instrumentation
Understanding CATNLF Technology
Projected Efficiency Gains
AirPro News Analysis
Frequently Asked Questions
The primary goal is to validate a wing design that reduces aerodynamic drag by maintaining smooth (laminar) airflow over the wing, potentially reducing fuel consumption by up to 10%.
CATNLF is a “passive” technology. It relies on the shape of the wing to control airflow, whereas “active” systems require pumps or suction devices to mechanically remove turbulent air.
Following the successful taxi tests on January 12, 2026, NASA has scheduled initial flight testing to begin in the coming weeks.
NASA is using an F-15B Research Testbed. The experimental wing is a scale model mounted underneath the aircraft, not the wing of the F-15 itself.
Photo Credit: NASA
Technology & Innovation
Horizon Aircraft Updates Cavorite X7 with Key Technical Enhancements
Horizon Aircraft standardizes the Cavorite X7 eVTOL lift system and refines aerodynamics to improve safety, efficiency, and passenger comfort for regional air mobility.
This article is based on an official press release from Horizon Aircraft.
On January 21, 2026, New Horizon Aircraft Ltd. (NASDAQ: HOVR) announced a series of significant technical updates to the design of its flagship hybrid-electric eVTOL, the Cavorite X7. Following the successful transition flight of a large-scale prototype in May 2025, the company has moved to standardize the aircraft’s vertical lift system and refine its aerodynamic profile. These changes are aimed at enhancing safety, simplifying manufacturing, and improving passenger comfort as the company progresses toward full-scale production.
The Cavorite X7 is designed as a long-range regional air mobility platform. Unlike many pure electric competitors focused on short urban hops, Horizon Aircraft utilizes a hybrid-electric power system intended for medical evacuation, disaster relief, and regional commercial transport. The latest engineering updates reflect data gathered during recent flight testing and detailed aerodynamic analysis.
The most substantial engineering change detailed in the company’s announcement is the standardization of the aircraft’s vertical lift fans. The Cavorite X7 utilizes a patented “fan-in-wing” system, where lift fans are embedded within the wings and covered by retractable panels during forward flight to reduce drag.
Previously, the aircraft’s design employed different fan sizes for the main wings and the forward canards. According to the press release, the updated design now features a total of 12 identical lift fans. The configuration places five fans in each main wing and one in each canard. By replacing the smaller canard fans with wing-sized units, Horizon Aircraft has achieved complete commonality across the lift system.
This shift to a single fan unit offers several industrial advantages. It simplifies the supply chain, streamlines the manufacturing process, and reduces the complexity of maintenance for future operators. Furthermore, the company states that each of these 12 fans is powered by a dual-motor redundant architecture, ensuring that the aircraft can maintain safe operation even in the event of a motor failure.
Beyond the propulsion system, Horizon Aircraft has introduced changes to the airframe and interior to optimize performance and user experience.
The engineering team has reprofiled the surfaces of the canards and the tail. These aerodynamic modifications are designed to reduce drag in cruise flight, thereby improving fuel efficiency and overall range. The changes also aim to enhance flight stability, a critical factor for an aircraft designed to operate in diverse weather conditions. Collaborating with mobility designer Andrea Mocellin, the company has also updated the cabin layout. The fuselage has been slightly extended to increase legroom, and the window structures have been redesigned to provide better visibility for passengers. These updates suggest a focus on the commercial viability of the aircraft, ensuring it meets the comfort standards expected in the regional air mobility market.
“The design changes effectively enhance performance while maintaining the company’s ‘mission-first’ approach to safety and utility.”
, Brandon Robinson, CEO of Horizon Aircraft
These technical announcements come shortly after Horizon Aircraft released its fiscal 2026 second-quarter results on January 14, 2026. The company, which trades on the NASDAQ under the ticker HOVR, reported an EPS loss of ($0.15) for the quarter. Despite the financial headwinds common in the capital-intensive eVTOL sector, the company has continued to secure funding, including a $2 million grant awarded in October 2025 to advance all-weather flight capabilities.
The successful transition flight of the large-scale prototype in May 2025 remains a pivotal Test-Flights for the program. Transitioning from vertical hover to wing-borne forward flight is widely considered one of the most difficult engineering challenges for VTOL aircraft. The data from that testing phase directly informed the standardization and aerodynamic refinements announced this week.
The decision to standardize the lift fans on the Cavorite X7 is a mature engineering move that signals a shift from pure prototyping to “design for manufacture.” In the aerospace industry, part commonality is a key driver in reducing unit costs and increasing reliability. By eliminating unique part numbers for the canard fans, Horizon Aircraft reduces the inventory burden for operators and simplifies the certification process, as fewer unique components need to be validated.
Furthermore, while many eVTOL developers are locked in a race for urban air taxi dominance, Horizon’s hybrid approach targets a different niche, regional utility and logistics. The ability to refuel rather than wait for recharging infrastructure gives the Cavorite X7 a potential operational advantage in rural or austere environments, such as medevac or search and rescue missions, where electric charging grids may be unreliable or nonexistent.
Horizon Aircraft Unveils Technical Refinements for Cavorite X7 eVTOL
Standardization of the Vertical Lift System
Moving to a 12-Fan Configuration
Aerodynamic and Cabin Enhancements
Drag Reduction and Efficiency
Interior Redesign
Context and Financial Background
AirPro News Analysis
Sources
Photo Credit: Horizon Aircraft
Technology & Innovation
Serbia Partners with Archer Aviation to Launch Air Taxi Network for EXPO 2027
Serbia selects Archer Aviation to deploy electric air taxis using Midnight eVTOLs for EXPO 2027, supporting urban transport and industrial growth.
This article is based on an official press release from Archer Aviation and additional data regarding the “Leap into the Future” national strategy.
The Republic of Serbia has officially designated Archer Aviation Inc. (NYSE: ACHR) as its preferred partner for the introduction of electric vertical take-off and landing (eVTOL) aircraft operations. The agreement, aimed at modernizing urban transport in Belgrade, positions the deployment of air taxis as a central component of the upcoming EXPO 2027.
According to the company’s announcement, the Partnerships was formalized to support Serbia’s goal of becoming a regional leader in advanced mobility. The initiative is part of a broader national modernization effort designed to enhance connectivity for the millions of visitors expected during the specialized exposition, which is scheduled to run from May through August 2027.
The collaboration focuses on utilizing Archer’s “Midnight” aircraft to shuttle passengers between key transport hubs, bypassing ground traffic congestion in the capital city. This move aligns with Serbia’s substantial infrastructure Investments and recent regulatory updates intended to facilitate Innovative Air Mobility (IAM).
The agreement, signed in Davos, Switzerland, outlines a potential purchase of up to 25 Midnight aircraft by the Serbian government. Archer CEO Adam Goldstein and Serbian President Aleksandar Vučić were present for the signing, signaling high-level political support for the project.
Under the terms of the partnership, Archer will work with the government to launch operations in coordination with the opening of EXPO 2027. The operational plan envisions a network connecting Nikola Tesla Airport, the new EXPO site in Surčin, and downtown Belgrade. This network is intended to serve both VIP guests and general visitors attending the global event.
“The Republic of Serbia is seeking to catalyze regional adoption of air taxis to drive technological advancement and job creation in the country.”
, Archer Aviation Press Release
Beyond the transport logistics, the partnership includes a strategic dialogue regarding industrial manufacturing. According to details released regarding the agreement, the two parties are exploring opportunities to leverage Serbia’s natural resources, specifically rare earth magnets and battery critical minerals, to support the global Supply-Chain for electric aircraft. The Midnight aircraft is Archer’s flagship production model, engineered for rapid, sustainable urban transit. The piloted, four-passenger eVTOL is designed to perform back-to-back flights with minimal downtime.
Key specifications highlighted in the company’s data include:
The introduction of air taxis is a pillar of the “Leap into the Future – Serbia EXPO 2027” national strategy. The government has pledged approximately €17.8 billion over several years for infrastructure projects related to the Expo and national development, including a new National Stadium and high-speed rail links.
To prepare for these operations, Serbia has aggressively updated its aviation laws. The Civil Aviation Directorate (CAD) of Serbia updated its Rulebook on air traffic operations in early 2025, introducing the classification of “Innovative Air Mobility” and defining safety standards for vertiports. These Regulations, which align with European Union Aviation Safety Agency (EASA) standards, became effective on May 1, 2025, providing a regulatory runway well in advance of the 2027 target launch.
This agreement represents a significant strategic win for Archer Aviation in the competitive European market. While competitors like Volocopter and Lilium have been active in securing partnerships across France, Italy, and Saudi Arabia, Archer’s securing of a government-backed mandate in Serbia diversifies its international footprint, which already includes planned networks in the UAE, India, and Japan.
Furthermore, the industrial aspect of this deal distinguishes it from a simple fleet purchase. By linking the aircraft acquisition to Serbia’s mining and manufacturing potential, specifically regarding critical battery minerals, the partnership addresses a potential bottleneck in the eVTOL supply chain while supporting Serbia’s economic goal of boosting its GDP by 2027.
Republic of Serbia Selects Archer Aviation to Launch Air Taxi Network for EXPO 2027
Partnership Framework and Fleet Potential
Industrial Cooperation
The “Midnight” Aircraft Specifications
Regulatory and Economic Context
AirPro News Analysis
Sources
Photo Credit: Archer Aviation
Technology & Innovation
Bristow Group Secures First Production Slot for Electra eL9 Aircraft
Bristow Group signs agreement to purchase five Electra eL9 hybrid-electric eSTOL aircraft, securing first production slots with deliveries from 2029.
This article is based on an official press release from Electra.aero.
In a significant move for the Advanced Air Mobility (AAM) sector, Bristow Group Inc. has signed a binding, deposit-backed agreement to purchase five Electra eL9 hybrid-electric short take-off and landing (eSTOL) aircraft. According to an official press release from Electra.aero, this agreement cements Bristow’s status as the launch customer for the eL9, securing the very first production slot.
The deal represents a firming of a previous Letter of Intent (LOI) between the two companies. Beyond the initial five firm orders, the agreement includes options for an additional 45 aircraft. This commitment highlights the growing operational confidence in eSTOL technology, which aims to bridge the gap between traditional helicopters and regional fixed-wing aircraft.
Electra’s eL9 is designed to operate from runways as short as 150 feet, utilizing a unique aerodynamic principle known as “blown lift.” By securing early delivery positions, Bristow intends to integrate these aircraft into its global fleet to offer new “middle-mile” logistics and regional transport solutions that were previously economically unviable.
Under the terms of the agreement, Bristow has placed a deposit to secure the first five delivery slots. Deliveries are scheduled to begin in the first year of the eL9’s production, which industry estimates anticipate around 2029. This strategic move ensures that Bristow will be the first operator to introduce the eL9 to the commercial market.
Marc Allen, CEO of Electra, emphasized the weight of this commitment in the company’s press statement:
“By reserving five delivery slots in the eL9’s first year of production, to include slot one, [Bristow] has made a powerful statement of confidence in Electra… and the future of direct aviation.”
Bristow’s management views the eL9 as a tool to expand their service portfolio. While the company is traditionally known for vertical lift operations supporting the energy sector and search and rescue missions, the eL9 offers the ability to access similar confined spaces, such as parking lots or barge decks, at a significantly lower operating cost than a helicopter.
The Electra eL9 is distinct from the electric Vertical Take-Off and Landing (eVTOL) aircraft often discussed in the media. Instead of hovering on thrust alone, the eL9 uses a hybrid-electric propulsion system to drive distributed propellers along the wing’s leading edge. This accelerates air over the wings, generating lift at extremely low speeds (down to approximately 35 mph). According to Electra’s technical data, the eL9 offers the following performance metrics:
Dave Stepanek, Bristow’s Chief Transformation Officer, noted in the release that the aircraft “fundamentally changes what regional air mobility can be,” citing its ability to create transport opportunities that do not exist with current airframes.
This agreement highlights a broader trend of diversification within the aviation industry. For Bristow, the eL9 provides a “portfolio approach” to modernizing its fleet. While the company has also partnered with eVTOL manufacturers like Vertical Aerospace and Eve Air Mobility for shorter intra-city hops, the eL9 addresses longer regional routes where speed and payload are critical.
We observe that Electra’s choice to pursue certification under FAA Part 23 for fixed-wing aircraft, rather than the “Powered Lift” category required for many eVTOLs, may offer a more streamlined path to market. Because the eL9 utilizes wings for lift throughout its flight envelope, it avoids some of the regulatory complexities associated with novel vertical flight modes.
Furthermore, the hybrid-electric architecture resolves a major hurdle facing the AAM industry: infrastructure. Since the eL9 recharges its batteries in-flight using a small turbogenerator, it does not rely on the build-out of high-capacity electric charging stations at every destination. This “drop-in” capability allows operators like Bristow to deploy the aircraft immediately into existing networks, a significant operational advantage over pure-electric competitors.
Sources: Electra.aero Press Release
Bristow Group Secures First Production Slot for Electra eL9 Hybrid-Electric Aircraft
Details of the Launch Agreement
The eL9: Technology and Capabilities
Key Specifications
Strategic Context and Market Impact
AirPro News Analysis
Sources
Photo Credit: Electra Aero
-
Commercial Aviation5 days agoUnited Airlines Stores Boeing 777s Over Engine Parts Shortage
-
MRO & Manufacturing14 hours agoAirbus Starts Serial Production of Large Titanium 3D-Printed A350 Parts
-
Technology & Innovation7 days agoHorizon Aircraft Reports $24M Cash and 2026 Prototype Timeline
-
Commercial Space6 days agoSingapore Airshow 2026 Launches Space Summit and New Features
-
Commercial Aviation4 days agoQantas Fleet Renewal and Cabin Upgrades for Western Australia