Vertical Aerospace Completes Final VX4 Prototype, Targets Hybrid Expansion in 2026

Vertical Aerospace (NYSE: EVTL) has officially announced the completion of its third and final full-scale VX4 prototype, a critical milestone intended to accelerate the company’s path toward Certification. According to a statement released on December 22, 2025, the new aircraft is scheduled to begin piloted flight testing in January 2026 following a brief commissioning phase.

The addition of this aircraft effectively doubles the Bristol-based manufacturer’s flight test capacity. By operating two identical full-scale prototypes simultaneously, Vertical Aerospace aims to increase the frequency of data gathering required for regulatory approval. This development comes shortly after the company unveiled “Valo,” its rebranded commercial production aircraft, and signaled a strategic expansion into hybrid-electric propulsion for defense and logistics markets.

Accelerating the Path to Certification

The newly completed aircraft is a VX4 model, identical to the second prototype that has been undergoing rigorous testing in the UK. In November 2025, the existing prototype received its Permit to Fly and has since completed 10 piloted flights, successfully expanding the aircraft’s flight envelope. The primary role of this final prototype is to serve as a workhorse for validating aerodynamics, flight control software, and battery technologies.

According to the company’s announcement, the immediate schedule for the new unit involves post-production systems checks followed by a maiden piloted flight in January. Stuart Simpson, CEO of Vertical Aerospace, emphasized the importance of this addition to their fleet:

“As we look ahead to 2026, the addition of our final prototype marks an important step in closing out our prototype flight test programme and maintaining momentum towards commercialization. Our test pilots are eager to get this aircraft into the air.”

Strategic Pivot: Hybrid Propulsion and the “Valo” Tour

While the immediate focus remains on electric vertical takeoff and landing (eVTOL) certification, Vertical Aerospace is simultaneously broadening its technological scope. The company revealed that later in 2026, this final prototype will be retrofitted with a hybrid-electric propulsion system. This modification is designed to test long-range capabilities, with a target range of up to 1,000 miles, significantly higher than the ~100-mile range of the all-electric configuration.

This hybrid strategy targets the defense, logistics, and emergency medical services (EMS) sectors, where range and payload often outweigh the requirement for zero-emission short hops. The company projects a payload capacity of approximately 1,100 kg for this variant.

Distinguishing Prototype from Product

Vertical Aerospace has clarified the distinction between the testing hardware and the final commercial product. The aircraft currently flying, and the unit just completed, are VX4 prototypes. These utilize the original fuselage design and distributed battery packs to validate core systems.

In contrast, the commercial model, branded as Valo, features a redesigned fuselage, a V-tail with a tail wheel, and an under-floor liquid-cooled battery system. While the flying prototypes remain in the UK for technical validation, Vertical Aerospace plans to launch a US tour in January 2026, starting in New York City. This tour is expected to feature a full-scale static model of Valo to demonstrate the passenger experience to investors and partners.

Financial Outlook and Timeline

The expansion of the flight test program occurs against a backdrop of careful capital management. As of November 2025, Vertical Aerospace reported a cash position of approximately £89 million ($117 million). The company has stated this funding provides a runway through mid-2026, with a controlled net operating cash outflow guidance of $110–125 million for the 2025 fiscal year.

Key milestones for the upcoming year include:

• January 2026: Piloted flight testing of the final prototype and the start of the Valo US Tour.
• Mid-to-Late 2026: Retrofitting the final prototype for hybrid-electric trials.
• Throughout 2026: Public flight demonstrations, potentially at major international Air-Shows.
• 2028: Targeted Type Certification for Valo with the UK Civil Aviation Authority (CAA) and EASA.

AirPro News Analysis

The completion of a third prototype is a standard but vital step in aerospace certification; redundancy allows for parallel testing streams, one aircraft can focus on performance handling while the other tests system reliability or failure modes. However, the most significant revelation in this update is the concrete timeline for the hybrid-electric retrofit.

By targeting a 1,000-mile range with a hybrid variant, Vertical Aerospace is effectively hedging its bets. The pure-electric urban air mobility market is crowded and infrastructure-dependent. A hybrid variant opens immediate doors to military and cargo contracts that are less sensitive to noise and battery density constraints. With a cash runway extending only to mid-2026, demonstrating a viable hybrid technology later that year could be a decisive factor in securing the next tranche of necessary funding.

Sources

• Vertical Aerospace Press Release (Dec 22, 2025)
• Vertical Aerospace Official Website

Jekta Advances Electric Amphibian Program with 1:9 Scale Model Unveiling

Swiss aerospace manufacturer Jekta has officially unveiled a 1:9 scale model of its PHA-ZE 100 (Passenger Hydro Aircraft, Zero Emissions 100), marking a critical milestone in the development of its 19-passenger electric aviation amphibious aircraft. The announcement, made on December 11, 2025, confirms that the company has moved into active flight testing with the sub-scale demonstrator to validate its aerodynamic and hydrodynamic designs.

According to the company’s announcement, the remote-controlled model is currently undergoing flight campaigns in Italy. These tests are designed to gather real-world data that will be cross-referenced with computer simulations, ensuring the airframe is mature before the company proceeds to full-scale production. Jekta aims to reintroduce the utility of the “flying boat” to the global market, targeting an entry into service by 2030.

Flight Testing and Validation

The newly unveiled model represents a significant engineering step for the Payerne-based company. While digital modeling provides a theoretical baseline, physical testing of the 1:9 scale model allows engineers to observe how the hull interacts with water during takeoff and landing, as well as how the distributed electric propulsion system performs in flight.

The testing is taking place near the base of Jekta’s Head of Design, Max Pinucci, in Italy. In a statement regarding the program’s progress, Jekta CEO George Alafinov emphasized the practical utility of the large-scale model:

“The 1:9 scale model is large enough to provide data representative of the full-size aircraft and is allowing us to efficiently expand the test envelope… ensuring the aircraft’s maturity as we work towards introducing it to the global air transport network in 2030.”

, George Alafinov, CEO of Jekta

PHA-ZE 100 Technical Specifications

The full-scale PHA-ZE 100 is designed to serve coastal communities, island nations, and regional routes that lack extensive airport infrastructure. By utilizing existing waterways and standard runways, the aircraft offers operational flexibility without the need for the expensive vertiports often required by eVTOL (electric vertical takeoff and landing) competitors.

According to technical details released by the manufacturer, the aircraft will feature:

• Capacity: 19 passengers in a standard economy configuration, with options for VIP or cargo layouts.
• Propulsion: Distributed Electric Propulsion (DEP) utilizing 8 electric motors mounted on the wings for redundancy and safety.
• Speed: A cruise speed of 110–135 knots (approximately 200–250 km/h).
• Certification Basis: The aircraft is being developed to meet EASA CS-23 and FAA FAR-23 standards.

Battery vs. Hydrogen Variants

Jekta has outlined a dual-propulsion strategy to meet different market needs. The base model will utilize battery-electric technology, offering a range of approximately 150 km, suitable for short inter-island hops. However, through a partnership with ZeroAvia, Jekta is also developing a hydrogen fuel cell variant. This configuration is projected to quadruple the effective range to nearly 600 km, making regional connectivity viable for zero-emission operators.

AirPro News Analysis

The Return of the Flying Boat

Jekta’s progress highlights a growing sub-sector in sustainable aviation: the modernization of the amphibious aircraft. While the “Golden Age” of flying boats faded after World War II due to the rise of long runways and jet engines, the format solves a specific modern problem. Developing nations in Southeast Asia and archipelagos like the Maldives often struggle to build land-based runways due to ecological concerns or lack of space. The PHA-ZE 100’s ability to operate from water offers an “infrastructure-light” solution.

We note that Jekta faces competition in this niche, specifically from Norway’s Elfly Group, which is developing the 9-seat “Noemi,” and the US-based REGENT, which is building the “Viceroy” seaglider. However, Jekta’s 19-seat capacity places it in a larger utility class, potentially appealing to operators looking to replace aging Twin Otters or Cessna Caravans on over-water routes.

Frequently Asked Questions

When will the Jekta PHA-ZE 100 enter service?

Jekta is targeting an entry into service (EIS) for 2030 or 2031, following certification under EASA and FAA regulations.

What is the range of the aircraft?

The battery-electric version has a range of approximately 150 km, while the hydrogen fuel cell variant aims for a range of up to 600 km.

Is this a vertical takeoff (VTOL) aircraft?

No. The PHA-ZE 100 is an amphibious aircraft that takes off and lands horizontally on water (using its hull) or on land (using retractable wheels). It does not require the complex tilt-rotor mechanisms found in eVTOLs.

Sources

• Jekta Switzerland

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

Bye Aerospace Partners with Composite Approach for Production-Conforming eFlyer 2

Bye Aerospace, the Denver-based developer of the all-electric eFlyer family of aircraft, has officially announced a strategic manufacturing partnership with Composite Approach. According to a press release issued on December 2, 2025, the Oregon-based manufacturer has been selected to produce the major composite structures, including the fuselage, wings, and empennage, for the first production-conforming eFlyer 2.

This agreement marks a significant transition for Bye Aerospace as it moves from the research and development phase into industrialization. The components manufactured by Composite Approach will be utilized to assemble the specific aircraft designated for the eFlyer 2’s inaugural flight as a production-conforming prototype. The company has targeted Spring 2026 for this milestone flight.

Moving Toward Certification

The partnership focuses on the “new-design” eFlyer 2, a term the company uses to distinguish the production-conforming airframe from previous proof-of-concept demonstrators. According to the company’s announcement, this airframe represents the design specifications submitted to the Federal Aviation Administration (FAA) for certification.

Rod Zastrow, CEO of Bye Aerospace, described the partnership as a critical step in the company’s roadmap. In the press release, Zastrow emphasized the shift toward physical production of the certified asset.

“This partnership marks a turning point for Bye Aerospace as we move from design to the physical production of our certified aircraft.”

, Rod Zastrow, CEO of Bye Aerospace

Composite Approach, located in Redmond, Oregon, brings decades of experience in advanced composite manufacturing. The firm is tasked with executing a “build-to-print” mandate, producing high-precision carbon fiber parts based on Bye Aerospace’s engineering data. Brian Harris, CEO of Composite Approach, noted in the release that the project involves “pushing the boundaries of composite technology” to meet the rigorous weight and aerodynamic requirements of electric-aviation.

Technical Specifications and Standards

The production-conforming eFlyer 2 is designed to meet the FAA’s Part 23 Amendment 64 certification basis, a performance-based regulation adapted to accommodate novel technologies like electric propulsion. The aircraft features an optimized aerodynamic design intended to maximize the lift-to-drag ratio, a critical factor for extending the range of battery-electric aircraft.

According to technical details released by the company, the aircraft will be powered by the Safran ENGINeUS™ 100 electric motor. This propulsion system, combined with high-density battery packs, is engineered to support a flight endurance of up to three hours. This endurance target is a key differentiator in the electric flight training market, where current certified competitors often offer significantly shorter flight times.

AirPro News Analysis: The Industrialization Phase

The selection of Composite Approach signals that Bye Aerospace is attempting to de-risk its path to market by leveraging an established supply chain partner rather than building internal fabrication capacity from scratch. By outsourcing the major structural components, Bye Aerospace can concentrate its internal resources on systems integration, final assembly, and the complex FAA certification process.

The stakes are high for the Denver-based manufacturer. With a reported order backlog exceeding $700 million, the company faces pressure to deliver a certified product to flight schools eager to reduce operating costs. Traditional training aircraft burn leaded aviation fuel and require frequent engine maintenance; Bye Aerospace claims the eFlyer 2 will operate at one-fifth the cost of these legacy aircraft.

While the Spring 2026 target for the inaugural flight is ambitious, it represents the critical path toward final certification flight testing. If the eFlyer 2 can achieve its projected 3-hour endurance, it would offer a distinct operational advantage over existing certified electric aircraft, such as the Pipistrel Velis Electro, which is generally limited to local traffic patterns.

Frequently Asked Questions

What is the difference between the “new-design” eFlyer 2 and previous versions?
Previous versions were technology demonstrators or “proof-of-concept” aircraft. The “new-design” refers to the production-conforming aircraft, built exactly to the specifications submitted to the FAA for final certification.

When will the production-conforming eFlyer 2 fly?
Bye Aerospace has targeted Spring 2026 for the inaugural flight of this specific airframe.

Who is manufacturing the airframe?
Composite Approach, a manufacturer based in Redmond, Oregon, will build the fuselage, wings, and empennage.

What is the primary market for this aircraft?
The eFlyer 2 is a two-seat aircraft designed primarily for the flight training market, aiming to replace aging gasoline-powered trainers like the Cessna 172.

Sources

• Bye Aerospace Press Release