Technology & Innovation
Vertical Aerospace Advances VX4 eVTOL with Successful Wingborne Flight Testing
Vertical Aerospace completes Phase 3 wingborne tests of VX4 eVTOL, preparing for transition testing and 2028 certification.
Vertical Aerospace has reached a pivotal milestone in the development of electric vertical takeoff and landing (eVTOL) aircraft by completing Phase 3 wingborne flight testing of its VX4 prototype. This achievement positions the company for the next critical step: transition testing, which will demonstrate the VX4’s ability to seamlessly shift between vertical (helicopter-like) and horizontal (airplane-like) flight modes. Such progress places Vertical among the global leaders in eVTOL development, as it moves through a rigorous four-phase test program targeting type certification by 2028. The recent wingborne flights have yielded over 22 billion data points, validating the aircraft’s aerodynamic models, acoustic signatures, system reliability, and performance.
These technical advancements come at a time of significant momentum for the eVTOL industry, which is projected to expand from $13.9 billion in 2024 to $37 billion by 2033. This growth is being driven by rapid urbanization, heightened environmental awareness, and innovations in battery and propulsion systems. The success of the VX4’s wingborne flights marks an important validation for both Vertical Aerospace and the broader eVTOL sector, signaling that commercial electric air mobility may soon become a reality in urban and regional markets.
In this article, we examine the technical, regulatory, and market context for Vertical Aerospace’s recent achievements, analyze the VX4’s design and testing program, and explore the broader implications for the evolving eVTOL landscape.
The eVTOL sector has emerged as one of the most promising areas within aviation, propelled by advances in battery energy density, electric propulsion, and lightweight composite materials. The global eVTOL market was valued at $13.9 billion in 2024 and is forecast to reach $37 billion by 2033, reflecting an annual growth rate of 11.4%. This expansion underscores the industry’s potential to address urban mobility challenges and support sustainable transportation solutions.
Urban air mobility (UAM) is central to this vision, offering a way to bypass congested city streets and provide efficient, point-to-point air travel. Advances in battery technology have made electric flight increasingly viable for short-range, high-frequency operations typical of urban environments. At the same time, modern flight control systems and lightweight, high-strength composites have enabled new aircraft configurations that combine vertical takeoff and landing with efficient cruise flight.
Founded in Bristol in 2016, Vertical Aerospace is one of the leading European eVTOL developers. Bristol’s long-standing aerospace industry has provided access to skilled talent and established supply chains. The eVTOL sector is highly competitive, with major players such as Joby Aviation and Archer Aviation in the US, and Eve Air Mobility and Lilium in Europe. The industry has seen consolidation, with six firms attracting about 76% of total funding (approximately $5.5 billion), highlighting the capital-intensive and technically demanding nature of bringing eVTOLs to market.
The VX4 is a fixed-wing, tiltrotor eVTOL designed to carry a pilot and up to four passengers. Its four forward-tilting propellers enable both vertical takeoff/landing and efficient forward flight. The aircraft’s streamlined, composite fuselage minimizes weight while maximizing structural integrity, supporting the performance demands of urban air operations.
Key design features include high-aspect-ratio wings for improved lift-to-drag ratio, low-drag enclosed propellers to reduce noise, and integrated redundancies throughout the propulsion and fly-by-wire flight control systems. The VX4’s projected range is 100 miles (160 km) with a top speed of 150 mph (240 km/h). Recent test flights have demonstrated a top speed of 120 knots (222 km/h) and a maximum altitude of 2,000 feet. Safety is integral to the VX4’s design, with redundant systems, a ballistic recovery parachute, and robust fly-by-wire controls. Its electric powertrain offers zero-emission operation and is expected to lower maintenance costs due to fewer moving parts compared to conventional aircraft.
“The VX4’s design philosophy centers on maximizing safety, efficiency, and urban compatibility, key attributes for next-generation air mobility.”
Vertical Aerospace’s flight testing is structured in four phases: tethered hover (Phase 1), thrustborne (Phase 2), wingborne (Phase 3), and transition flight (Phase 4). Each phase systematically validates critical aspects of the VX4’s performance and safety.
Phase 1, completed in September 2024, focused on tethered hover and basic flight control validation. Phase 2 (thrustborne), completed in February 2025, demonstrated stable vertical takeoff, landing, and low-speed maneuvering. Phase 3 (wingborne), completed in September 2025, validated the VX4’s ability to fly and land like a conventional airplane, with lift generated by its wings. This phase included piloted flights covering 250 miles (400 km) and a notable 17-mile inter-airport flight between Cotswold Airport and RAF Fairford for the Royal International Air Tattoo.
Over 22 billion data points were collected during wingborne testing, providing robust evidence for aerodynamic, acoustic, and system reliability models. Regulatory approval for open airspace testing was secured in collaboration with the UK Civil Aviation Authority and EASA, reflecting confidence in the VX4’s safety and technical documentation.
“The aircraft performed exactly as modeled in our simulators, validating years of engineering work and simulation.”, Simon Davies, Chief Test Pilot, Vertical Aerospace
The imminent Phase 4 transition testing is considered the most technically complex. It will demonstrate the VX4’s ability to shift from vertical (thrustborne) to horizontal (wingborne) flight and back again, a defining capability for tiltrotor eVTOLs. This requires precise coordination between propulsion, flight controls, and aerodynamic surfaces to ensure safety and stability throughout the transition.
Transition testing builds on lessons from industry peers. Joby Aviation and Beta Technologies have both achieved piloted transitions with their full-scale prototypes, providing valuable precedents. Vertical’s systematic approach, comprehensive data collection, and regulatory engagement provide a strong foundation for this critical phase.
Successful transition testing is expected by the end of 2025, supporting the company’s goal of type certification by 2028. This milestone will demonstrate the VX4’s readiness for commercial passenger operations in urban and regional settings.
Vertical Aerospace operates in a highly competitive market dominated by a handful of well-funded players. US-based Joby Aviation and Archer Aviation have achieved significant flight testing milestones and established strategic partnerships with major airlines and Manufacturers. Eve Air Mobility, backed by Embraer, boasts a substantial order backlog and industry support. Vertical’s competitive advantages include approximately 1,500 pre-Orders from major airlines such as American Airlines, Japan Airlines, and GOL, as well as partnerships with aerospace suppliers like Honeywell, Rolls-Royce, Leonardo, and GKN. The company’s asset-light manufacturing strategy leverages Aciturri Aerostructures for airframe production, reducing capital requirements and accelerating development. The operational partnership with Bristow Group provides a “ready-to-fly” model, offering customers access to certified aircraft, pilots, and maintenance.
Despite industry consolidation, evidenced by Lilium and Volocopter’s recent insolvency proceedings, Vertical’s diversified partnerships and strong pre-order book strengthen its position as a leading contender in the global eVTOL race.
As of March 2025, Vertical Aerospace reported £66.8 million in cash and cash equivalents, with current resources projected to fund operations through Q4 2025. The company remains pre-revenue, with ongoing capital requirements typical of aircraft development programs. A recent public offering raised $90 million, including $25 million from Mudrick Capital, signaling continued investor confidence.
Vertical’s strategic Partnerships are central to its business model. Aciturri supplies the VX4 airframe, Honeywell provides flight control systems, and Bristow offers operational expertise. These collaborations allow Vertical to focus on design and certification while leveraging partners’ manufacturing and operational capabilities. The appointment of Patrick Ky, former EASA Executive Director, to the board further strengthens the company’s regulatory expertise.
Regulatory efforts are focused on concurrent certification with the UK Civil Aviation Authority and EASA, aligning with evolving international standards for eVTOLs. The regulatory framework addresses performance-based safety objectives, with graduated compliance standards based on aircraft size and intended use. Vertical’s regulatory progress is evidenced by approvals for open airspace testing and ongoing engagement with authorities.
“The collaboration between the FAA and EASA on eVTOL certification guidelines is paving the way for global market access and harmonized standards.”
Battery technology remains both the enabler and the primary constraint for eVTOL performance. eVTOL batteries face unique challenges, including high-power demands during takeoff and landing, frequent cycling, and limited opportunities for thermal recovery. Research by Oak Ridge National Laboratory has led to new electrolyte formulations tailored for eVTOL mission profiles, showing improved capacity retention during demanding flight phases.
Manufacturing innovations, such as advanced analytics, blockchain traceability, and predictive maintenance, are being integrated to improve battery quality and performance. Partnerships between battery manufacturers and eVTOL developers are emerging to address aviation-specific requirements, reflecting the need for specialized solutions beyond those used in automotive or consumer electronics.
While some industry leaders are optimistic about future battery improvements, others remain cautious. Airbus Helicopters, for example, has paused its eVTOL program pending further advances in battery maturity, citing current limitations in range, performance, and cost-effectiveness. The eVTOL market spans passenger transport, cargo delivery, emergency services, and government applications. Urban air mobility is the primary focus, with the VX4’s range and speed well-suited for city-center to airport transfers and regional commuting. Major airlines have placed significant pre-orders, reflecting confidence in the technology’s commercial potential.
Beyond passenger operations, eVTOLs offer potential for rapid cargo delivery and medical transport, with lower operating costs and noise profiles than helicopters. Infrastructure development, including vertiports and charging stations, will be critical for supporting widespread adoption.
Vertical’s “ready-to-fly” operational model, developed with Bristow, lowers barriers for operators by providing turnkey access to certified aircraft and operational support. This approach could accelerate adoption and market penetration, especially in regions with limited aviation infrastructure.
Vertical Aerospace’s recent achievements mark a major step toward commercial eVTOL operations. The company’s methodical testing program, robust data collection, and regulatory collaboration provide a strong foundation for type certification and commercial deployment. The transition testing phase, expected to conclude by the end of 2025, will be a defining milestone for the VX4 and the broader industry.
The eVTOL sector is poised for significant growth in the late 2020s, contingent on continued technical progress, regulatory harmonization, and public acceptance. Advances in battery technology, infrastructure development, and operational partnerships will be key enablers. As eVTOLs move closer to commercial reality, their integration into urban transportation systems could reshape urban planning and accelerate the adoption of sustainable aviation.
What is the VX4 and what makes it unique? What are the key milestones achieved by Vertical Aerospace recently? When is commercial certification expected for the VX4? Who are Vertical Aerospace’s major partners and customers? What are the main challenges facing the eVTOL industry? Sources:
Vertical Aerospace Advances Toward Commercial eVTOL Aviation with Successful Wingborne Flight Testing and Imminent Transition Phase
Background and Industry Context
VX4 Aircraft Design and Specifications
Flight Testing Program and Recent Achievements
Transition Testing Phase and Technical Challenges
Market Position and Competitive Landscape
Financial Performance, Partnerships, and Regulatory Progress
Technology Trends and Battery Developments
Market Opportunities and Commercial Applications
Future Outlook and Industry Implications
FAQ
The VX4 is a fixed-wing, tiltrotor eVTOL developed by Vertical Aerospace. It combines vertical takeoff and landing capability with efficient forward flight, using four tilting propellers and lightweight composite construction for urban and regional air mobility.
Vertical has completed Phase 3 wingborne flight testing, validating aerodynamic and system performance, and is preparing for transition testing, which will demonstrate seamless shifts between vertical and horizontal flight modes.
Vertical Aerospace targets type certification for the VX4 by 2028, aligning with timelines from other leading eVTOL developers.
Key partners include Aciturri Aerostructures (airframe manufacturing), Honeywell (flight controls), and Bristow Group (operations). Major customers with pre-orders include American Airlines, Japan Airlines, and GOL.
The industry faces technical challenges in battery performance, certification complexity, capital requirements, and the need for supporting infrastructure and public acceptance.
Vertical Aerospace
Photo Credit: Vertical Aerospace
Technology & Innovation
Joby Aviation and Metropolis Develop 25 US Vertiports for eVTOL Launch
Joby Aviation partners with Metropolis Technologies to retrofit parking garages into 25 vertiports across US cities, supporting a 2026 eVTOL commercial launch.
This article is based on an official press release from Joby Aviation.
Joby Aviation has announced a significant infrastructure partnership with Metropolis Technologies to develop a network of 25 vertiports across the United States. The collaboration aims to repurpose existing parking infrastructure into “mobility hubs” to support the commercial launch of electric vertical takeoff and landing (eVTOL) aircraft.
According to the company’s announcement, the partnership will leverage Metropolis’s extensive portfolio of parking facilities to create takeoff and landing sites in key metropolitan areas. By retrofitting existing structures rather than building new terminals from the ground up, Joby intends to accelerate the deployment of its air taxi service, which is currently targeting a commercial launch in 2026.
The initiative addresses one of the most critical challenges in the Urban Air Mobility (UAM) sector: the “last mile” connection. The integration of ground and air travel is designed to offer passengers a seamless transition from their vehicles to Joby’s aircraft, utilizing advanced artificial intelligence to streamline the process.
The core strategy of this partnership involves identifying and upgrading sites within Metropolis’s network, which expanded significantly following its recent acquisition of SP+. With access to over 4,200 parking facilities, the companies plan to select prime locations in high-density urban centers such as Los Angeles, San Francisco, and New York City.
Joby Aviation stated that this retrofit approach offers a distinct advantage over constructing standalone vertiports. By utilizing the top decks of existing parking garages, the partners can reduce upfront construction costs and navigate zoning requirements more efficiently. These sites will be designed to meet the Federal Aviation Administration’s (FAA) Engineering Brief 105A, which outlines the specific design standards for vertiport geometry, marking, and load-bearing capacity.
“For air taxis to deliver on their promise of seamless urban travel, they must connect directly with the existing ground transportation ecosystem. By leveraging existing parking infrastructure… we can maximize the value of those sites without needing to build infrastructure from scratch.”
, JoeBen Bevirt, Founder and CEO of Joby Aviation
Beyond physical infrastructure, the partnership emphasizes the integration of Metropolis’s proprietary technology. The company utilizes AI-powered computer vision to manage facility access and payments. In the context of air travel, this technology aims to facilitate a “drive-in, fly-out” experience. According to the release, cameras will recognize a passenger’s vehicle upon entry, automatically processing parking fees and initiating the check-in process for their flight. This system is intended to eliminate the need for physical tickets, gates, or kiosks, aligning with the industry’s push for a frictionless passenger experience.
“The real world is the next frontier for AI… We are taking the data and recognition capabilities we’ve built in our network and extending it to air travel, creating the seamless, personalized, and magical experience that is the foundation of the Recognition Economy.”
, Alex Israel, CEO of Metropolis Technologies
While the construction of full vertiports is a longer-term project targeting 2026, the partnership includes immediate operational steps. Metropolis subsidiary Bags Inc. will begin providing VIP baggage handling services for Blade Urban Air Mobility, a partner of Joby Aviation, in New York City. This service will support flights between Manhattan and major airports such as JFK and Newark.
Los Angeles has been identified as a primary market for the initial vertiport rollout. The companies are currently evaluating downtown parking structures that can be adapted to support high-frequency air taxi operations. This focus on Los Angeles aligns with Joby’s broader strategy to establish a foothold in regions with high traffic congestion, where the time-saving value of eVTOL aircraft is most apparent.
We observe that this partnership represents a divergent strategy in the race for UAM infrastructure. While competitors like Archer Aviation have partnered with Atlantic Aviation to electrify existing private aviation terminals (FBOs), Joby is betting on bringing aircraft closer to the consumer’s daily commute via parking garages.
The “retrofit” model proposed by Joby and Metropolis may offer scalability advantages. Parking garages are ubiquitous in city centers, whereas private air terminals are typically located on the periphery at airports. If successful, this approach could allow Joby to penetrate dense urban cores more deeply than competitors relying solely on airport-based infrastructure.
However, we note that retrofitting parking decks presents its own engineering challenges, particularly regarding the structural reinforcement required to handle the weight and dynamic loads of landing aircraft, as well as the installation of high-voltage charging infrastructure in older buildings.
Transforming Parking Garages into Mobility Hubs
Integration of AI Technology
Immediate Rollout and Strategic Markets
AirPro News Analysis
Frequently Asked Questions
Sources
Photo Credit: Joby Aviation
Technology & Innovation
Vertical Aerospace Targets Full VX4 Transition Flight in Early 2026
Vertical Aerospace advances VX4 flight tests with 10 piloted flights completed; full transition now targeted for early 2026 amid regulatory updates.
This article is based on an official press release from Vertical Aerospace and includes analysis based on publicly available financial filings.
On December 19, 2025, Vertical Aerospace released a significant operational update regarding the flight testing of its full-scale VX4 prototype. According to the company, the engineering team has successfully completed 10 piloted test flights since receiving a “Permit to Fly” from the UK Civil Aviation Authority (CAA) in November. While the company reports expanding the majority of the flight envelope, the critical milestone of full piloted transition, switching completely from vertical hover to wing-borne cruise, has not yet been achieved.
The Bristol-based eVTOL (electric vertical take-off and landing) manufacturer stated that weather constraints and limited testing windows have pushed the target for full transition into early 2026. This update comes shortly after the company unveiled “Valo,” its production-intent aircraft, earlier this month.
Since resuming flight activities on November 13, 2025, Vertical Aerospace reports that the VX4 prototype has undergone rigorous testing to validate its handling and safety systems. The press release highlights that the aircraft has successfully performed acceleration and deceleration maneuvers and tested various tilt positions for its rotors.
According to Vertical Aerospace, the Test-Flights campaign has achieved several specific technical milestones:
The testing program has successfully validated the in-flight deployment and stowing of rear propellers, propeller spin-up during wing-borne flight, and “prop-hold” functionality.
The company notes that the “majority of the transition envelope” has now been expanded, leaving only the final 10% of the tilt transition untested. The completion of this final phase is required to demonstrate the aircraft’s ability to fly purely on wing lift, a defining characteristic of viable eVTOL technology.
Alongside the flight test updates, Vertical Aerospace announced a regulatory achievement involving the UK Civil Aviation Authority (CAA). The Regulations has granted the company new privileges allowing it to approve its own “Flight Conditions” and issue Permits to Fly for specific scenarios.
In the press release, the company framed this development as a signal of regulatory confidence in their design and engineering processes. This authorization is expected to streamline future testing phases by reducing the administrative lead time required for certain flight approvals. It is important for industry observers to distinguish between the aircraft currently undergoing testing and the product Vertical Aerospace intends to bring to market. The operational update refers specifically to the VX4 prototype, which serves as a testbed for data gathering. However, the commercial future of the company rests on “Valo,” the production model unveiled around December 10, 2025.
While the VX4 validates the core physics and control laws, Valo features a redesigned airframe, updated wing architecture, and an under-floor battery system. The delay in the VX4’s full transition means that critical aerodynamic data needed to finalize Valo’s Certification profile, targeted for 2028, will not be fully available until the prototype completes its envelope expansion in 2026.
The delay of the full transition flight places Vertical Aerospace behind its primary United States competitors in terms of technical milestones. Competitors such as Joby Aviation and Archer Aviation successfully completed full piloted transition flights earlier in 2025. Furthermore, the European market saw a significant contraction earlier this year with the reported insolvency of Lilium in February 2025, highlighting the capital-intensive nature of the sector.
Financial-Results sustainability remains a key focus for Vertical Aerospace. According to the company’s Q3 2025 Business & Strategy Update, Vertical reported a cash position of approximately $117 million. Based on current burn rates, the company projects this capital will fund operations until mid-2026.
With certification slated for 2028, this creates a “funding gap” that the company will need to address. The shift of the transition milestone to 2026 may influence investor sentiment, as the market often looks to technical achievements as validation for further capital injection.
What is the difference between the VX4 and Valo? When will Vertical Aerospace achieve full transition? What is the company’s current financial runway?
Vertical Aerospace Updates VX4 Flight Test Progress; Full Transition Targeted for Early 2026
VX4 Flight Testing Achievements
Regulatory Developments
Strategic Context and Market Position
AirPro News Analysis: The VX4 vs. Valo Distinction
AirPro News Analysis: Financial and Competitive Landscape
Frequently Asked Questions
The VX4 is the current full-scale prototype used for flight testing and validation. Valo is the recently unveiled production-intent aircraft that Vertical Aerospace plans to manufacture commercially, featuring design improvements based on VX4 data.
The company has rescheduled the full piloted transition flight, where the aircraft switches from vertical lift to wing-borne flight, for early 2026, citing weather and scheduling constraints.
As of the Q3 2025 update, Vertical Aerospace holds approximately $117 million in cash, which is projected to sustain operations until mid-2026.
Sources
Photo Credit: Vertical Aerospace
Technology & Innovation
Eve Air Mobility Completes First Flight of Full-Scale eVTOL Prototype
Eve Air Mobility conducted a successful first flight of its full-scale eVTOL prototype in Brazil, validating key systems ahead of 2027 certification.
This article is based on an official press release from Eve Air Mobility.
On December 19, 2025, Eve Air Mobility achieved a critical milestone in the development of its electric vertical take-off and landing (eVTOL) aircraft. The company, a subsidiary of Brazilian aerospace giant Embraer, successfully conducted the first flight of its full-scale prototype at the Embraer test facility in Gavião Peixoto, São Paulo, Brazil.
This uncrewed hover flight validates the fundamental architecture of the aircraft, which utilizes a “Lift + Cruise” configuration distinct from the tilt-rotor designs favored by some competitors. According to the company’s official statement, the test confirmed the functionality of the electric propulsion system and the 5th-generation fly-by-wire controls, performing exactly as computer models had predicted.
While Eve Air Mobility is entering the flight-test phase later than some of its primary rivals, the successful deployment of a full-scale prototype signals the company’s transition from design to execution. With a target Entry into Service (EIS) set for 2027, Eve is leveraging Embraer’s industrial backing to accelerate its Certification program.
The test conducted in Gavião Peixoto was a dedicated hover flight. This specific profile is designed to test the vertical lift capabilities of the aircraft before attempting forward wing-borne flight. The prototype utilized eight dedicated vertical lift rotors to maintain a stable hover, allowing engineers to assess aerodynamic performance and control laws in real-world conditions.
Johann Bordais, CEO of Eve Air Mobility, emphasized the significance of the event in a statement released by the company:
“Today, Eve flew… This flight validates our plan, which has been executed with precision to deliver the best solution for the market.”
Following this successful hover test, the company plans to expand the flight envelope throughout 2026. This will involve transitioning from vertical lift to forward flight, powered by the rear pusher propeller, and testing the aircraft’s fixed wing for cruise efficiency.
The prototype flown represents the configuration intended for commercial certification. Unlike “tilt-rotor” designs that rotate propellers to switch between lift and cruise modes, Eve has opted for a separated “Lift + Cruise” architecture. This design choice prioritizes mechanical simplicity and potentially lower maintenance costs. According to technical specifications released by Eve Air Mobility, the aircraft features:
At AirPro News, we observe that Eve’s successful first flight places it in a unique position within the “race to market.” While competitors like Joby Aviation and Archer Aviation have already logged significant flight hours with full-scale prototypes, including transition flights, Eve’s strategy appears to be one of deliberate, industrial-scale preparation over speed.
The “Lift + Cruise” design philosophy suggests a focus on reliability and operating economics. By avoiding the complex tilting mechanisms found in competitor aircraft, Eve may offer operators a vehicle with fewer moving parts and lower direct maintenance costs. Furthermore, Eve’s relationship with Embraer provides immediate access to a global service and support network, a logistical hurdle that independent Startups must build from scratch.
Despite being arguably the “tortoise” in terms of flight testing timelines, Eve holds the industry’s largest backlog of Letters of Intent (LoI), totaling nearly 3,000 aircraft. This massive order book indicates strong market confidence in Embraer’s ability to deliver a certifiable product.
Looking ahead, Eve Air Mobility has outlined a rigorous schedule for the next two years. The company intends to build five additional conforming prototypes in 2026 to accelerate data collection. These aircraft will be used to accumulate the hundreds of flight hours required for certification authorities.
Luiz Valentini, CTO of Eve, noted the disciplined approach to the upcoming testing phase:
“The prototype behaved as predicted by our models… We will expand the envelope and progress toward transition to wingborne flight in a disciplined manner.”
The company is targeting Type Certification from Brazil’s ANAC in 2027, with concurrent validation sought from the FAA (USA) and EASA (Europe). Commercial deliveries are scheduled to begin immediately following certification.
Eve Air Mobility Successfully Completes First Flight of Full-Scale eVTOL Prototype
Flight Details and Technical Validation
Aircraft Specifications: The “Eve-100”
AirPro News Analysis: The Strategic Landscape
Future Roadmap: Certification and Service
Frequently Asked Questions
Sources
Photo Credit: Embraer
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