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Honeywell and Vertical Aerospace Advance eVTOL Certification for Urban Air Mobility

Honeywell and Vertical Aerospace expand partnership to accelerate certification of VX4 eVTOL aircraft, targeting 2028 commercial launch for sustainable urban transport.

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Honeywell and Vertical Aerospace Deepen Certification Partnership

The aerospace industry is undergoing a transformative shift, with electric vertical take-off and landing (eVTOL) aircraft poised to redefine urban mobility. At the forefront of this evolution is the partnership between UK-based Vertical Aerospace and American aerospace conglomerate Honeywell. In April 2025, the two companies expanded their strategic collaboration to accelerate the certification and commercialization of Vertical’s VX4 eVTOL platform. This move is more than a business agreement, it’s a signal of how legacy aerospace expertise and startup innovation are converging to shape the future of Advanced Air Mobility (AAM).

The VX4, Vertical Aerospace’s flagship aircraft, is designed to offer sustainable, safe, and efficient air transport in congested urban environments. With over 1,500 pre-orders and a projected $1 billion in contract value with Honeywell through 2035, the partnership is a milestone in the eVTOL sector’s journey toward commercial viability. The collaboration focuses on integrating Honeywell’s state-of-the-art avionics and fly-by-wire systems, crucial for meeting the stringent certification standards set by aviation regulators.

As cities worldwide grapple with traffic congestion and carbon emissions, the potential of eVTOLs to provide cleaner and faster alternatives to ground transportation is gaining traction. The Honeywell-Vertical Aerospace partnership exemplifies the type of cross-sector cooperation needed to bring these futuristic solutions to market safely and efficiently.

Historical Context and Technological Foundations

Vertical Aerospace’s Journey

Founded in 2016 by Stephen Fitzpatrick, CEO of OVO Energy, Vertical Aerospace began with a mission to decarbonize aviation through electric propulsion. Early prototypes like the VA-X1 and VA-X2, unveiled in 2018 and 2019 respectively, showcased the feasibility of eVTOL technology using multicopter designs. However, by 2020, the company pivoted to a vectored-thrust configuration, culminating in the development of the VX4—a five-seat aircraft optimized for urban air mobility.

Key milestones in Vertical’s journey include securing approximately 1,500 pre-orders from major airlines such as American Airlines and Virgin Atlantic. In January 2025, the company achieved piloted thrustborne flight maneuvers, a critical benchmark in the certification process. These maneuvers, including rolling, yawing, and spot turns, demonstrate the aircraft’s control and stability during vertical flight.

The VX4’s development reflects a broader industry trend of startups leveraging agile innovation cycles to challenge traditional aerospace norms. Vertical’s ability to attract global partners and customers underscores the market’s confidence in its long-term vision.

“By integrating production-ready technologies, we’re building an aircraft that meets the highest safety standards, solidifying its certifiability across global markets.” — Stuart Simpson, CEO, Vertical Aerospace

Honeywell’s Aerospace Expertise

Honeywell Aerospace, a division of Honeywell International, brings over 80 years of experience in avionics, flight control systems, and safety-critical technologies. The Anthem flight deck, introduced in 2021, represents a fifth-generation cockpit system emphasizing modularity, connectivity, and AI-driven decision support. This system is central to the VX4’s flight management capabilities.

Since 2019, Honeywell has been a key partner in Vertical’s development roadmap, supplying the flight management system and fly-by-wire technology for the VX4. The company’s deep regulatory knowledge and proven track record in aerospace systems integration make it an ideal collaborator for the rigorous certification journey ahead.

Honeywell’s involvement extends beyond hardware. Its expertise in cross-regional certification protocols and aerospace-grade manufacturing is instrumental in preparing the VX4 for scalable production and international deployment.

Strategic Collaboration and Certification Pathway

Expanded Partnership Scope

The April 2025 agreement between Honeywell and Vertical Aerospace expands their collaboration into three critical areas: systems integration, certification frameworks, and production readiness. Honeywell’s Anthem flight deck and fly-by-wire systems will undergo extensive testing to meet the Special Condition for VTOL (SC-VTOL) standards set by the European Union Aviation Safety Agency (EASA).

Joint certification teams are aligning testing protocols with the requirements of the UK Civil Aviation Authority (CAA) and the U.S. Federal Aviation Administration (FAA). This harmonized approach is designed to streamline the approval process across multiple jurisdictions, a key factor in achieving global market access.

On the production side, Vertical’s Bristol-based Vertical Energy Center will scale the manufacturing of batteries and propulsion systems using Honeywell’s aerospace-grade supply chain. This integration of production capabilities is a critical step toward achieving commercial operations by 2028.

Technical Specifications of the VX4

The VX4 is engineered for short-range urban missions with a focus on safety, efficiency, and low environmental impact. It features eight electric motors that deliver a 20% improved power-to-weight ratio, enabling a cruising speed of 150 mph and a range of approximately 100 miles. These specifications make it suitable for intercity routes as well as urban commutes.

Its avionics suite, powered by Honeywell’s Anthem system, includes customizable touchscreen interfaces and AI-enabled decision-support tools. The aircraft also incorporates redundant fly-by-wire controls and energy-absorbing landing gear to enhance safety during critical flight phases.

These technical features are not only aimed at meeting regulatory requirements but also at building public trust in the new mode of transportation. Safety, reliability, and user experience are central to the VX4’s design philosophy.

“Our shared commitment to reliability and safety will unlock scalable solutions for urban air mobility.” — David Shilliday, VP of Advanced Air Mobility, Honeywell

Market Potential and Financial Outlook

Vertical Aerospace has secured over 1,500 pre-orders for the VX4, representing a potential revenue of $6 billion. These orders come from a diverse range of customers across four continents, reflecting strong global interest in eVTOL solutions. The expanded partnership with Honeywell is projected to generate $1 billion in revenue through 2035.

Analysts estimate the global AAM market will grow at a compound annual growth rate (CAGR) of 24.6%, reaching $137 billion by 2035. This growth is driven by urban congestion, environmental concerns, and advances in battery technology. eVTOLs like the VX4 are positioned to become a cornerstone of this emerging ecosystem.

Juniper Research forecasts that AAM-related revenue could approach $6 billion by 2030, with urban air mobility services potentially reducing commute times by up to 50%. These projections underscore the economic and societal benefits of transitioning to electric aviation.

Conclusion: A Blueprint for Urban Air Mobility

The partnership between Honeywell and Vertical Aerospace represents a significant step toward realizing the vision of sustainable, scalable urban air transport. By combining Honeywell’s deep aerospace expertise with Vertical’s innovative design and agile development, the VX4 project is well-positioned to meet the complex demands of certification and commercialization.

Looking ahead, the success of this collaboration could serve as a blueprint for future AAM initiatives. As the industry navigates regulatory challenges and public scrutiny, strategic partnerships like this one will be essential for building the trust and infrastructure needed to make eVTOLs a mainstream transportation option.

FAQ

What is the VX4?
The VX4 is a five-seat electric vertical take-off and landing (eVTOL) aircraft developed by Vertical Aerospace for urban air mobility.

When will the VX4 be commercially available?
Vertical Aerospace aims to begin commercial operations of the VX4 by 2028, pending regulatory approvals.

What role does Honeywell play in the VX4 project?
Honeywell provides the flight management system, including the Anthem flight deck and fly-by-wire controls, and supports certification and production readiness.

Sources

Photo Credit: AviationInternationalNews

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Electric Aircraft

Elysian Aircraft Advances E9X Electric Airliner Design for Regional Flights

Elysian Aircraft completes second design iteration of the E9X, an all-electric regional airliner seating up to 100 passengers with a 750 km range.

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This article is based on an official press release from Elysian Aircraft.

On April 10, 2026, Dutch aerospace startup Elysian Aircraft announced a significant milestone in its pursuit of zero-emission regional aviation. According to a company press release, Elysian has successfully completed the Conceptual Design Review (CDR) for the second design iteration of its all-electric-aviation, battery-powered airliner, the E9X. This achievement marks the program’s critical transition from early feasibility studies into the preliminary design and technology maturation phase.

Alongside the digital and architectural validations of the CDR, the company confirmed the successful initial test-flights of a 4-meter Scaled Flight Demonstrator (SFD). This physical testing phase is designed to validate the aircraft’s aerodynamic properties and flight control systems under real-world conditions, reinforcing the data previously gathered through digital simulations.

The developments at Elysian Aircraft challenge a long-held industry consensus. While many aerospace manufacturers have relegated battery-electric flight to small, 9-to-19 seat commuter planes due to battery weight constraints, Elysian is pushing forward with a design intended to carry up to 100 passengers. By focusing on extreme aerodynamic efficiency and structural battery integration, the company aims to prove that large-scale electric aviation is a viable near-term reality.

E9X Second Iteration: Design and Performance Updates

The second iteration of the E9X introduces several notable technical refinements compared to the initial concept unveiled in 2024. According to the company’s specifications, the propulsion system has been streamlined from eight electric motors down to six. These six motors will feature a slightly higher output, allowing for an aerodynamically cleaner wing design closer to the folding wingtips.

To accommodate structural changes and optimize lift, the aircraft’s wingspan has been extended from 42 meters to 50 meters, accompanied by an increase in the Maximum Take-Off Weight (MTOW). Passenger capacity has also been refined; while initially stated as a flat 90 seats, the optimized design now accommodates between 88 and 100 passengers.

Range Adjustments and Battery Integration

Elysian has adjusted the targeted range for the E9X to 750 kilometers (approximately 400 nautical miles), a slight reduction from the initial 800-kilometer estimate. However, the company notes that it aims to extend this range to 1,000 kilometers (540 nm) as battery energy density improves over time. Even at the current 750-kilometer range, Elysian projects that the aircraft can service roughly 50 percent of the world’s commercial air network.

The aircraft’s design relies heavily on modular battery systems housed entirely within the wing-box. This structural choice is intended to maximize energy efficiency and operational flexibility. Additionally, to meet stringent aviation safety and reserve requirements, the E9X incorporates a turbogenerator located at the rear of the aircraft.

From Digital Models to Physical Reality

The transition from digital renders to physical engineering is a focal point of Elysian’s recent announcements. The successful flight of the 4-meter SFD provided crucial physical data on the integration of distributed electric propulsion. Furthermore, the company has progressed to constructing a full-scale model of the wing to physically test and validate the integration of its modular battery systems.

“We’re maturing the E9X through targeted demonstrators and system testing, while advancing the enabling technologies. These technologies also have relevance beyond the E9X civil programme.”

Rob Wolleswinkel, Chief Technology Officer, Elysian Aircraft

Industry Implications and Strategic Partnerships

Elysian Aircraft, backed by Panta Holding and launched with $10 million in initial funding, is positioning the E9X as a highly cost-competitive alternative to traditional turboprops and narrowbody jets. The company claims its all-battery design results in an energy loss of only 18 percent, which it highlights as significantly more energy-efficient than hydrogen fuel-cell or hydrogen turbine alternatives.

To achieve its ambitious timeline, targeting a full-scale prototype by 2030 and commercial service entry by 2033, Elysian is collaborating with over 50 research partners and industry players. Key partnerships include airlines like KLM and Transavia, which are assisting with network planning and economic validation. On the engineering front, Elysian is working with TU Delft, the German Aerospace Center (DLR), the Royal Netherlands Aerospace Centre (NLR), Fokker Services Group, and Spain’s Aernnova.

Broader Electrification Technologies

The advancements made during the E9X’s second iteration extend beyond a single aircraft model. Elysian emphasizes that its high-voltage architecture and battery integration technologies serve as “technology bricks” with potential dual-use applications across the broader aerospace and defense sectors.

“This second iteration marks the transition from feasibility studies to technology maturation. We are not only advancing the E9X programme but also developing the core electrification technologies that support broader aerospace applications.”

Daniel Rosen Jacobson, Co-Founder and Co-CEO, Elysian Aircraft

AirPro News analysis

We note that Elysian Aircraft’s strategy directly confronts the prevailing narrative that hydrogen is the only viable path to zero-emission flight for larger regional aircraft. By targeting the 88-to-100 seat segment, the E9X is effectively encroaching on the lower end of the traditional short-haul market, a space historically dominated by smaller variants of the Boeing 737 and Airbus A320 families, as well as regional jets from Embraer.

The slight reduction in the initial range target to 750 kilometers reflects the harsh physical realities of current battery energy densities. However, the inclusion of a rear turbogenerator for reserve power is a pragmatic regulatory necessity that shows Elysian is designing for actual certification pathways, rather than purely theoretical maximums. If the company can successfully validate its full-scale wing and modular battery integration, it could force legacy airframers to re-evaluate the upper size limits of battery-electric commercial flight.

Frequently Asked Questions (FAQ)

What is the passenger capacity of the Elysian E9X?
The second design iteration of the E9X is optimized to carry between 88 and 100 passengers.

What is the range of the E9X?
The current design targets a range of 750 kilometers (approx. 400 nautical miles). Elysian aims to extend this to 1,000 kilometers as battery technology improves.

When is the E9X expected to fly?
Elysian Aircraft is targeting the completion of a full-scale prototype by 2030, with commercial service entry planned for 2033.

How does the E9X handle reserve power requirements?
To meet safety and reserve flight requirements, the E9X design incorporates a turbogenerator at the rear of the aircraft.


Sources

Photo Credit: Elysian Aircraft

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Doroni Aerospace Unveils H1-X Personal eVTOL Aircraft Model

Doroni Aerospace revealed its H1-X personal eVTOL with 100-mile range and SOUL AI™ system, targeting 2028 deliveries from Florida.

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This article is based on an official press release from Doroni Aerospace.

Doroni Aerospace has officially unveiled the showroom engineering model of its H1-X personal electric vertical takeoff and landing (eVTOL) aircraft. The reveal took place during the company’s “Soul of the Sky” event on March 26, 2026, at its headquarters in Dania Beach, Florida, where guests were given an exclusive first look at the hardware and its accompanying software ecosystem.

According to the company’s official press release, this unveiling represents a critical milestone in its mission to bring personal aerial mobility to the consumer market. Alongside the physical aircraft, Doroni introduced SOUL AI™, a proprietary Digital Co-Pilot Operating System designed to make personal flight highly intuitive for everyday users.

With initial deliveries targeted for 2028, the H1-X is engineered to fit inside a standard two-car garage and operate without the need for specialized aviation infrastructure. Local officials also recognized the milestone, with Dania Beach Mayor Joyce L. Davis issuing a proclamation designating March 26 as “Doroni Aerospace Day.”

The H1-X eVTOL: Technical Specifications

Design and Performance

Based on company specifications released during the event, the H1-X is a two-seater personal aircraft that prioritizes efficiency and ease of use. The eVTOL boasts an estimated range of up to 100 miles on a single charge. It is designed to reach a cruise speed of 95 mph and a top speed of 120 mph.

To support daily commuting, the aircraft utilizes swappable battery packs that are compatible with standard electric vehicle (EV) chargers, allowing for a full charge in 20 to 25 minutes. The vehicle has an empty weight of 1,850 lbs and supports a maximum payload capacity of 500 lbs. Because it is capable of vertical takeoff and landing, the H1-X requires no runway and can be operated directly from a standard residential driveway.

Safety and Propulsion

The H1-X features a patented tandem wing configuration paired with an electric ducted fan propulsion system. Lift is generated by eight vertical electric motors, while forward flight is powered by two rear-mounted pusher propellers.

Safety remains a focal point of the design. The ducted fans enclose the spinning blades, a feature the company notes will significantly reduce noise and protect bystanders on the ground. Additional safety measures include redundant flight control systems, advanced anti-collision sensors, and a built-in whole-aircraft ballistic parachute.

Introducing SOUL AI™ Digital Co-Pilot

Lowering the Barrier to Entry

A major highlight of the “Soul of the Sky” event was the introduction of SOUL AI™, Doroni’s proprietary onboard operating system. The software acts as an intelligent human-machine interface (HMI) designed to lower the barrier to entry for new pilots.

According to the company, the system is built on three core pillars: Protection, Guidance, and Experience. It functions as a “360-degree guardian” using environmental sensors, provides real-time navigation and weather updates via secured connections, and replaces the traditional aviation cockpit with a modern, intuitive interface.

Doroni Aerospace CEO and Founder Doron Merdinger emphasized that the technology is meant to seamlessly integrate with the user. Speaking on the software’s design philosophy, Merdinger stated:

“We aim to make this vehicle feel less like a machine you have to manage and more like a natural extension of you.”

Certification and Market Strategy

Regulatory Pathway

Founded in 2016, Doroni Aerospace handles its engineering, testing, and production in-house at its South Florida facilities. In December 2023, the company achieved a significant regulatory milestone by receiving a Special Airworthiness Certification from the FAA, permitting manned flight testing in U.S. airspace.

Moving forward, Doroni plans to certify the H1-X as a Light Sport Aircraft (LSA) under the FAA’s proposed Modernization of Special Airworthiness Certification (MOSAIC) rules. This pathway would make the aircraft accessible to consumers with standard pilot training. As of mid-2025, the company reported securing over 500 pre-orders for the H1-X.

AirPro News analysis

We note that Doroni’s strict focus on the direct-to-consumer market differentiates it significantly from the broader Advanced Air Mobility (AAM) industry. While major players like Joby Aviation and Archer Aviation are currently dominating the sector by developing commercial “air taxi” services, Doroni is treating the eVTOL more like a personal luxury EV. By designing an aircraft that charges on standard EV infrastructure and fits in a residential garage, the company effectively bypasses the need for specialized “vertiports”, currently a major logistical and financial hurdle for the commercial air taxi industry. Furthermore, the enclosed ducted fan design, while historically complex to engineer, is a vital component for neighborhood safety and noise reduction, making the concept of driveway takeoffs a realistic possibility.

Frequently Asked Questions (FAQ)

When will the Doroni H1-X be available to consumers?

According to the company’s current timeline, initial deliveries of the H1-X are slated for 2028.

Do I need a commercial pilot’s license to fly the H1-X?

No. Doroni Aerospace plans to certify the H1-X as a Light Sport Aircraft (LSA) under the FAA’s proposed MOSAIC rules, which would allow consumers to operate the vehicle with standard pilot training rather than a commercial license.

Where can the H1-X take off and land?

The aircraft is capable of vertical takeoff and landing (eVTOL) without a runway. It is designed to operate from a standard driveway and can be parked inside a typical two-car garage.


Sources: Doroni Aerospace Official Press Release

Photo Credit: Doroni Aerospace

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KULR and Robinson Collaborate on Battery System for eR66 Electric Helicopter

KULR Technology Group and Robinson Helicopter Company partner to develop a next-gen battery system for the eR66 electric helicopter, targeting late 2026 milestones.

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This article is based on an official press release from KULR Technology Group, Inc. and Robinson Helicopter Company.

On March 26, 2026, KULR Technology Group and Robinson Helicopter Company (RHC) announced a strategic co-development collaboration aimed at advancing Electric-Aviation. According to the official press release, the partnership will focus on developing a next-generation, high-performance battery system for the eR66, a battery-electric demonstrator variant of Robinson’s widely used R66 turbine Helicopters.

Under the new agreement, KULR will serve as the battery architecture co-developer for the eR66 platform. The Houston-based technology company will design and integrate a lightweight battery system utilizing its proprietary thermal management and safety technologies, which were originally developed for human-rated spaceflight applications. The companies have targeted late 2026 for their initial program milestones.

The collaboration seeks to drive critical improvements in energy density and thermal stability while establishing a domestic supply chain for electric aviation components. By leveraging RHC’s Manufacturing capabilities in Torrance, California, and KULR’s engineering operations in Texas, the initiative aims to support the broader decarbonization of the aerospace sector.

The eR66 Program and the Pragmatic Path to Electric Flight

Retrofitting a Proven Platform

The eR66 project represents a distinct approach to electric aviation. Rather than building an entirely new eVTOL aircraft from the ground up, RHC is retrofitting its standard R66, a light, gas-turbine helicopter introduced in 2012 that has seen over 1,500 units built to date, according to industry research data. By utilizing an already FAA-certified airframe, RHC intends to bypass many of the infrastructure and supply chain hurdles currently facing novel eVTOL Startups.

This development builds upon RHC’s ongoing electrification efforts. Industry reports note that in July 2025, RHC announced a joint agreement with electric propulsion company magniX to provide the HeliStorm electric engine and Samson batteries for the eR66 demonstrator. The March 2026 agreement brings KULR into the fold specifically to design the lightweight integration and safety protocols required to make the battery system viable for rigorous flight conditions.

While the standard gas-turbine R66 boasts a range of approximately 650 kilometers, research estimates place the eR66’s range at around 185 kilometers. RHC leadership has indicated that this shorter range is highly adequate for targeted, short-haul missions.

Space-Grade Safety for Aviation Batteries

KULR’s Thermal Management Expertise

Balancing high energy density with low weight remains the primary engineering challenge in electric aviation, particularly concerning thermal runaway, a critical safety risk where battery cells overheat and catch fire. To address this, KULR is implementing its KULR ONE platform. According to company data, this architecture utilizes fibercore flame arrestors, ablative shielding, and sidewall rupture protection to ensure fail-safe operations.

In the press release, KULR CTO Dr. Will Walker emphasized the importance of their engineering background in overcoming these hurdles.

“Our engineering team’s extensive background in designing fail-safe batteries for human rated applications will be critical to achieving the rigorous performance and Certification goals,” Walker stated in the release.

KULR, which currently holds a market capitalization of approximately $114 million and has reported 72% revenue growth over the trailing twelve months according to recent financial data, brings NASA-qualified technology to the commercial rotorcraft sector. KULR CEO Michael Mo noted that their battery systems were designed from day one for dual use, proving their architecture’s viability in rotorcraft.

Targeting Specialized Missions and Sustainability

Organ Transport and the Circular Economy

A primary focus for the eR66 is high-demand, short-haul applications such as rapid organ and tissue transport. In Emergency Medical Services (EMS), speed is critical, but noise and emissions often restrict traditional helicopter operations in dense urban environments. By eliminating the Rolls-Royce gas turbine, the electric powertrain is expected to cut up to a third of the aircraft’s noise, specifically the high-pitch turbine whine.

David Smith, who became President and CEO of RHC in February 2024, highlighted the operational benefits of the electric variant in the company’s announcement.

“For use cases like rapid organ and tissue transport, the reduced acoustic signature and zero-emission profile ensure that time-sensitive, low-emission deliveries are faster, quieter, and more sustainable,” Smith said.

Beyond zero-emission flight, the partnership is also pioneering circular economy principles in aviation. The companies announced plans to develop “second life” applications for the battery systems post-flight. This means the batteries are designed for a primary flight cycle in the eR66, followed by a certified second life in other applications, thereby maximizing the lifecycle of the hardware and reducing environmental waste.

AirPro News analysis

We view the RHC and KULR collaboration as a highly pragmatic counter-narrative to the current eVTOL hype cycle. While billions of dollars are being poured into uncertified, ground-up air taxi designs that require entirely new infrastructure, RHC is leveraging the world’s most popular civil helicopter platform. By electrifying the R66, operators will be able to utilize existing helipads, established pilot training frameworks, and current maintenance networks. Furthermore, bringing in KULR to adapt NASA-grade thermal shielding directly addresses the FAA’s stringent safety concerns regarding lithium-ion battery fires in aviation. If successful, this retrofit model could offer a significantly faster and more capital-efficient path to market for commercial electric flight than clean-sheet eVTOL designs.

Frequently Asked Questions

What is the eR66?

The eR66 is a battery-electric demonstrator helicopter based on Robinson Helicopter Company’s proven R66 gas-turbine platform. It is designed to offer reliable, low-noise, and zero-emission performance for short-haul flights.

What is KULR’s role in the partnership?

KULR Technology Group is serving as the battery architecture co-developer. They are responsible for designing and integrating a lightweight, high-performance battery system that utilizes their proprietary thermal management and safety technologies to prevent thermal runaway.

When will the eR66 reach its first milestones?

According to the joint press release, the companies are targeting late 2026 for their initial program milestones.


Sources: KULR Technology Group and Robinson Helicopter Company Press Release

Photo Credit: Robinson Helicopter Company

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