This article is based on an official press release from H55 and Smartflyer.

Swiss electric aviation companies Smartflyer and H55 have announced a significant milestone in the development of the SFX1 hybrid-electric aircraft. According to a joint press release, Smartflyer has officially received the first batch of Adagio battery modules from H55, marking a critical step forward for the SFX1 Proof of Concept Demonstrator program.

The delivery enables Smartflyer to transition from component-level validation to full system integration and testing. For H55, the handover represents the continued integration of its certification-ready battery systems into active aircraft development programs, reinforcing its position in the electric propulsion market.

The SFX1 program is now entering an advanced stage of development. With the battery modules in hand, integration activities are intensifying across multiple workstreams, keeping the aircraft on track for its upcoming testing phases.

The SFX1 Program Advances

System Integration and Testing

The newly delivered Adagio battery modules will be integrated into the SFX1 aircraft as part of the next phase of development. According to the press release, this phase includes comprehensive system-level validation covering the propulsion architecture, energy management, and other critical aircraft systems.

Ground testing of the SFX1 is planned for the summer of 2026, with the first flight targeted for autumn of the same year.

“Receiving the first Adagio battery modules from H55 is a major milestone for Smartflyer and a key enabler for the next phase of our development program,” said Rolf Stuber, CEO of Smartflyer, in the company’s press release. “It also highlights the strength of our collaboration with a partner whose technology is not only innovative but ready for real-world application.”

About the Smartflyer SFX1

Industry estimates and company specifications indicate that the Smartflyer SFX1 is a four-seat hybrid-electric aircraft designed for sustainable pilot training and touring. The aircraft features a unique design with a tail-mounted propeller, which allows for laminar airflow and increases efficiency by up to 30 percent compared to conventional configurations. The hybrid system aims to reduce carbon dioxide emissions by 50 percent and noise by 60 percent, while offering a range of up to 750 kilometers (400 nautical miles).

H55’s Adagio Battery System

Certification and Commercial Deployment

The delivery of the Adagio modules reflects the maturity of H55’s product portfolio. The press release notes that the Adagio battery system has successfully completed all regulator-required certification tests, demonstrating its safety, reliability, and suitability for integration across various electric and hybrid-electric aircraft applications.

“This delivery marks an important step in bringing H55’s certified battery and propulsion solutions into operational aircraft programs,” said Rob Solomon, Chief Executive Officer of H55. “Our collaboration with Smartflyer illustrates how our technology, spanning both electric and hybrid-electric configurations, is moving from development into commercial application.”

AirPro News analysis

We note that the partnership between Smartflyer and H55 highlights the growing momentum in the Swiss electric aviation sector. H55, founded in 2017 by the technological legacy team behind the Solar Impulse program, has been steadily expanding its footprint. The company’s certification-grade energy storage systems are not only powering the SFX1 but are also slated for use in other notable projects, including the Bristell B23 Energic and a Pratt & Whitney Canada regional hybrid-electric flight demonstrator.

By securing regulatory approval for its battery modules, H55 is addressing one of the most significant bottlenecks in electric aviation, certification. For Smartflyer, leveraging a pre-certified battery system significantly reduces development risk and accelerates the path to market for the SFX1. If the summer 2026 ground tests and autumn 2026 first flight proceed as planned, we expect the SFX1 could become a strong contender in the emerging market for sustainable flight training and regional touring aircraft.

Frequently Asked Questions (FAQ)

What is the Smartflyer SFX1?

The Smartflyer SFX1 is a hybrid-electric aircraft currently in development in Switzerland. It is designed to be a four-seat aircraft suitable for sustainable pilot training and touring, featuring a distinctive tail-mounted propeller.

Who is providing the batteries for the SFX1?

H55, a Swiss-based company specializing in certified electric propulsion and energy storage systems, is providing its Adagio battery modules for the SFX1.

When will the Smartflyer SFX1 fly?

According to the official press release, ground testing is scheduled for the summer of 2026, with the first flight targeted for the autumn of 2026.

Sources

• H55 and Smartflyer Press Release
• Smartflyer Official Website

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

• Elysian Aircraft Press Release

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