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Collins Aerospace Begins Hybrid-Electric Powertrain Testing for Clean Aviation

Collins Aerospace initiates testing of hybrid-electric propulsion systems at The Grid lab for the EU Clean Aviation SWITCH project to reduce emissions and improve efficiency.

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This article is based on an official press release from RTX / Collins Aerospace.

On March 16, 2026, Collins Aerospace, an RTX business, announced a major milestone in sustainable aviation by initiating testing for its electric motor drive systems. According to the official press release, this testing is a core component of the European Union’s Clean Aviation SWITCH project, which aims to revolutionize propulsion for future Commercial-Aircraft.

The testing is currently underway at “The Grid,” the company’s advanced electric power systems laboratory located in Rockford, Illinois. This phase marks a critical step in the development of hybrid-electric Propulsion technologies, which are designed to significantly reduce emissions and improve fuel efficiency for future short- and medium-range commercial aircraft.

As the aviation industry faces mounting pressure to decarbonize, hybrid-electric systems offer a viable near-to-medium-term solution. By transitioning from theoretical design to physical megawatt-class testing, Collins Aerospace and its European partners are moving hybrid-electric commercial flight closer to reality.

Inside the Powertrain Testing at “The Grid”

Advancing Megawatt-Class Systems

The current testing phase focuses on an integrated hybrid-electric powertrain subsystem. According to the company’s announcement, this subsystem includes two megawatt-class motor generators, advanced controllers, and comprehensive power distribution systems. Following successful validation, these key subsystems will be integrated into a hybrid-electric Pratt & Whitney GTF engine demonstrator for the next phase of testing.

“The Grid,” where these tests are being conducted, is a $50 million, 25,000-square-foot facility that officially opened in October 2023. Designed with an initial test capability of 8 megawatts, enough to power a small town, the lab allows engineers to evaluate full propulsion systems in real-world configurations rather than isolating individual components.

“The start of powertrain subsystem testing is a key step towards demonstrating the potential of applying more electric systems to future commercial aircraft. Hybrid-electric technology has the potential to transform aviation by enabling greater fuel efficiency across multiple future platforms, including next generation single-aisle aircraft.”
, Kristin Smith, Vice President, Electric Power Systems at Collins Aerospace

The Clean Aviation SWITCH Project

A Collaborative European Initiative

The SWITCH project, standing for Sustainable Water-Injecting Turbofan Comprising Hybrid-Electrics, is a major initiative funded by the European Union under the Clean Aviation Joint Undertaking. The consortium is coordinated by MTU Aero Engines AG and includes major aerospace players such as Pratt & Whitney, Collins Aerospace, GKN Aerospace, Airbus, and various European research institutions.

The project’s primary objective is to develop a novel propulsion concept that merges hybrid-electric propulsion with Water-Enhanced Turbofan (WET) technology and Pratt & Whitney’s GTF engine architecture.

Global Component Origins

The SWITCH powertrain is a testament to cross-border aerospace collaboration. Components were developed across multiple European research and development facilities before arriving in Illinois for testing. Collins Aerospace designed and produced the megawatt-class electric motors and controllers in Solihull, UK, while the power distribution components, including a solid-state power controller and distribution panel, were designed in Nördlingen, Germany. Additionally, GKN Aerospace developed and built the high-voltage electrical wiring interconnection system (EWIS) in Papendrecht, Netherlands.

Environmental Targets and Industry Impact

Pushing Toward Net-Zero

The environmental targets for the SWITCH project are ambitious. The initiative aims to improve fuel burn and energy consumption by 20% while achieving a 50% reduction in the climate impact of both NOx emissions and contrails compared to current state-of-the-art engines. Furthermore, the technologies are being designed to be fully compatible with 100% drop-in Sustainable Aviation Fuel (SAF) and will be evaluated for future use with Hydrogen.

The Clean Aviation Joint Undertaking targets reducing CO2 emissions of short-to-medium-range aircraft by no less than 30%, and regional aircraft by 50%. While fully electric aircraft remain limited by battery weight and energy density, hybrid-electric systems optimize the performance of fuel-burning gas turbines during energy-intensive phases of flight, such as takeoff, significantly reducing overall fuel consumption.

AirPro News analysis

We view the progression of the SWITCH project as a vital indicator of the aerospace sector’s pragmatic approach to decarbonization. By focusing on hybrid-electric architectures for single-aisle aircraft, RTX and its partners are acknowledging the current limitations of battery technology while still pushing for substantial, near-term efficiency gains. The integration of these systems into the proven GTF engine architecture suggests a clear pathway to commercialization, rather than a purely experimental endeavor. Furthermore, RTX’s broader strategy, which includes the hybrid-electric flight demonstrator for regional turboprops and the PioneerLab project, underscores a diversified, multi-platform commitment to electrification.

Frequently Asked Questions

What is the SWITCH project?

SWITCH (Sustainable Water-Injecting Turbofan Comprising Hybrid-Electrics) is an EU-funded initiative aiming to combine hybrid-electric propulsion with Water-Enhanced Turbofan technology to reduce aviation emissions.

Where is Collins Aerospace testing the powertrain?

Testing is taking place at “The Grid,” a $50 million, 8-megawatt advanced electric power systems laboratory located in Rockford, Illinois.

What are the environmental goals of the SWITCH project?

The project targets a 20% improvement in fuel burn and energy consumption, and a 50% reduction in the climate impact of NOx emissions and contrails compared to current engines.

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Photo Credit: Collins Aerospace

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Heart Aerospace ES-36 Unveiled With JSX Order for 100 Aircraft

Heart Aerospace unveiled the ES-36 hybrid-electric airliner with a deposit-backed JSX order for up to 100 aircraft and a 2031 service target.

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Swedish manufacturer Heart Aerospace unveiled the ES-36 hybrid-electric regional airliner on September 23, 2026, securing a deposit-backed orders from United States public charter carrier JSX for up to 100 Commercial-Aircraft. The commitment includes 50 firm orders and 50 purchase rights, providing a major financial endorsement for the newly redesigned twin-engine production model.

In a press release issued on September 23, 2026, Heart Aerospace detailed the transition from its previously announced ES-30 to the larger ES-36. The updated design offers a 20 percent increase in payload capacity and shifts to a simplified two-nacelle configuration, driven by data gathered from the mid-August 2026 first flight of the company’s X1 demonstrator aircraft.

Design Evolution and Performance Specifications

The ES-36 represents a significant structural and Propulsion pivot for Heart Aerospace. The aircraft features a 95-foot wingspan, which is approximately 11 feet shorter than the preceding ES-30 design. The propulsion system has been streamlined from four propellers to two, utilizing twin series-hybrid powertrains. Each Electric-Aviation motor generates 1.65 megawatts of power.

According to reporting by FLYING Magazine, the ES-36 marks a return to a series-hybrid configuration after the manufacturer temporarily explored an independent hybrid system starting in May 2024. The finalized architecture targets an all-electric range of 125 miles (200 kilometers) and a maximum hybrid range of 745 miles (1,200 kilometers), inclusive of standard reserves.

Heart Aerospace Chief Technology Officer Ben Stabler stated that the design changes stem directly from the X1 demonstrator testing program.

“The ES-36 design is a direct result of what Heart learned designing, building, testing and flying our X1 demonstrator aircraft. Those learnings have helped us make the production aircraft more capable in the air and more productive for operators.”

JSX Fleet Strategy and Route Network

The JSX order advances the carrier’s strategy to deploy zero-emission-capable aircraft on short regional segments. While the ES-36 is designed for 36 passengers, JSX operates under Federal Aviation Administration (FAA) Part 135 Regulations. This regulatory framework legally limits passenger capacity to 30 seats, dictating how the carrier will configure its incoming fleet.

Aviation Week reported that JSX intends to utilize the ES-36 for high-frequency, short-distance routes that are economically unviable for conventional turboprops or regional jets. JSX Chief Executive Officer Alex Wilcox highlighted historical routes along the California coast, such as flights between Santa Monica and Santa Barbara, as prime candidates for the hybrid-electric aircraft.

A key operational advantage for JSX is the reduced maintenance burden of electric propulsion. Wilcox noted to Aviation Week that electric motors lack the cycle sensitivity inherent to traditional turbofan and turboprop engines, allowing for point-to-point flying without prohibitive wear-and-tear costs. Heart Aerospace projects the ES-36 will deliver operating costs at least 40 percent lower than legacy regional aircraft.

Certification Timeline and Market Outlook

The JSX agreement builds upon an initial letter of intent signed in 2023 for the earlier ES-30 model. Heart Aerospace Founder and Chief Executive Officer Anders Forslund credited the charter carrier for championing electric aviation early in the development cycle.

Heart Aerospace is targeting the second half of 2028 for the first flight of the ES-36. The manufacturer anticipates achieving FAA Part 25 certification and subsequent entry into service by 2031.

AirPro News analysis

The transition from the ES-30 to the ES-36 demonstrates a maturation in Heart Aerospace’s design philosophy, prioritizing aerodynamic efficiency and payload over the complexity of a four-engine distributed propulsion system. By securing a firm, deposit-backed commitment from an established operator like JSX, we view Heart Aerospace as having successfully validated its redesign in the commercial market. The 1,415-pound payload increase directly addresses a common vulnerability in early electric aircraft designs, where heavy battery systems often severely restrict practical passenger and cargo capacity. If the 2031 entry-into-service target holds, the ES-36 could become a foundational asset for operators looking to revive dormant short-haul regional networks.

Sources: Heart Aerospace

Photo Credit: Heart Aerospace

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Electra.aero EL2 Completes Heliport Flights at Virginia Airports

Electra.aero flew its EL2 demonstrator from commercial heliports in Virginia under the FAA’s AAM Integration Pilot Program.

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On September 22, 2026, Electra.aero, Inc. announced the successful completion of test flights operating its hybrid-electric EL2 Ultra Short technology demonstrator from a commercial airport heliport in Virginia. The flights demonstrated the ability of fixed-wing aircraft to utilize vertical flight infrastructure and helicopter-specific instrument procedures, establishing a framework for expanding airport capacity without increasing runway congestion.

In a press release issued on September 22, 2026, the company detailed operations conducted in coordination with the Federal Aviation Administration (FAA) electric Vertical Takeoff and Landing (eVTOL) and Advanced Air Mobility (AAM) Integration Pilot Program. The testing validates the operational model for Electra’s upcoming nine-passenger EL9 aircraft.

Validating Ultra Short operations at commercial Airports

The flight test campaign focused on executing point-in-space procedures and dedicated instrument routings. Electra’s EL2 demonstrator successfully took off and landed on small heliports, vertiports, and taxiways that have historically been restricted to rotorcraft. Operations were conducted at Roanoke–Blacksburg Regional Airport (KROA), Virginia Tech/Montgomery Regional Airport (KBCB), and Allan C Perkinson/Blackstone AAF Airport (KBKT), alongside additional sites in Newport News and Richmond.

Electra Chief Executive Officer Marc Allen stated the Virginia flights provide a preview of future airspace integration.

“We showed that fixed-wing, Ultra Short aircraft can use vertical flight landing areas and a new generation of instrument procedures to reach places conventional airplanes were never designed to access. This will both bring air service closer to the passenger and also expand capacity at commercial airports in completely non-congestive ways,” Allen said.

Regulatory coordination and future integration

The testing represents the culmination of a year-long effort between Electra, the FAA, the Virginia Smart Airspace Program, the Virginia Department of Aviation, and the Pennsylvania Department of Transportation (PennDOT) to develop flexible approach procedures for Ultra Short aircraft. By utilizing airspace and airport surfaces currently underutilized by conventional fixed-wing traffic, the operations aim to establish guidelines for integrating new aircraft classes into the National Airspace System.

Dr. Parker Vascik, Director of Product Strategy at Electra, described the flights as a foundational step for AAM operations.

“All in all, we demonstrated the core enabling principle of Ultra Short aircraft feeding into major airports in a manner that complements rather than burdens the air traffic system,” Vascik said.

Tombo Jones, Director of the Virginia Tech Mid-Atlantic Aviation Partnership, emphasized the necessity of practical flight testing to generate the operational data required to integrate new aircraft types safely and efficiently into the airspace system.

The EL9 production aircraft

The operational data gathered from the EL2 demonstrator flights will directly support the development and certification of Electra’s flagship EL9 Ultra Short aircraft. According to the company, the EL9 is designed to offer a 2.5x payload multiplier and a 10x range multiplier compared to standard helicopters and eVTOLs.

Operating costs for the EL9 are projected to be 70 percent lower than comparable rotorcraft. Electra reports holding more than 2,200 letters of intent from over 60 commercial customers for the production aircraft.

AirPro News analysis

The successful demonstration of fixed-wing operations on helicopter infrastructure addresses a primary bottleneck in the Advanced Air Mobility sector: ground infrastructure. By proving that the EL2 can utilize existing heliports and point-in-space instrument procedures, Electra bypasses the need for bespoke vertiport construction that many eVTOL manufacturers require. We view this as a significant regulatory and operational de-risking milestone for the EL9 program. If the FAA formally adopts these flexible approach procedures, Electra’s operators will gain immediate access to a vast network of underutilized urban and airport-adjacent landing sites.

Sources: Electra.aero, Inc.

Photo Credit: Electra aero

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Rolls-Royce to Lead ELEVATED Hybrid-Electric EU Project

Rolls-Royce leads the ELEVATED consortium under EU Clean Aviation, targeting 20% CO2 cuts with 2028 ground testing.

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Rolls-Royce will lead a European consortium to develop and test a hybrid-electric gas-turbine propulsion system, targeting a minimum 20 percent reduction in aircraft-level carbon dioxide emissions for future short- to medium-range aircraft.

In a press release issued on September 18, 2026, the manufacturers announced its selection to head the ELEVATED project under the European Union’s Clean Aviation Joint Undertaking (CAJU). The initiative will embed a hybrid-electric subsystem into a donor engine for realistic ground testing, which is scheduled for 2028 using the Rolls-Royce UltraFan 30 narrowbody technology demonstrator.

Clean Aviation funding and consortium details

The ELEVATED project is one of 19 initiatives selected during the CAJU Call 4 funding round. The European Union allocated up to €290 million across these projects, generating a total public and private investments of €664 million. The broader Clean Aviation programme operates with a €4.1 billion budget, comprising €1.7 billion in EU funding and €2.4 billion from private sources.

Rolls-Royce Deutschland Ltd & Co KG will lead the ELEVATED consortium. The group includes academic, research, and industry partners distributed across France, Germany, the Netherlands, Norway, Spain, and the United Kingdom.

The overarching goal of the Clean Aviation programme for short- to medium-range and regional aircraft is a 30 percent reduction in emission footprint compared to 2020 state-of-the-art aircraft. The ELEVATED project specifically aims to advance hybrid-electric technology toward Technology Readiness Level 6 (TRL6).

Integration with the UltraFan 30 demonstrator

The project will utilize the UltraFan 30, a technology demonstrator designed by Rolls-Royce for narrowbody applications and engineered for compatibility with 100 percent sustainable aviation fuel (SAF). By integrating hybrid-electric elements into this architecture, the consortium intends to evaluate the performance impacts on thrust, fuel burn, noise, and durability.

Alan Newby, Director – Research & Technology at Rolls-Royce, stated that the project will generate data to validate modeling and inform future technology selection, product development, and certification planning.

“Together with the turbomachinery work being advanced through the ongoing UNIFIED project, it will help bring together the key technology paths needed to validate future UltraFan capability and support best-in-class performance in thrust, fuel burn, noise, emissions and durability,” Newby said in the company statement.

Additional hydrogen research initiatives

Alongside the ELEVATED project, Rolls-Royce confirmed its participation in two other newly announced Clean Aviation projects. The FARMAN project will focus on the development of hydrogen distribution systems for commercial aviation applications.

The company will also participate in the H-ELENA project, which is dedicated to advancing hydrogen engines for low-emission nitrogen oxide (NOx) architectures. Both projects align with the manufacturer’s broader research into alternative propulsion and fuel systems.

AirPro News analysis

The selection of Rolls-Royce to lead the ELEVATED project underscores the European aerospace sector’s reliance on established engine manufacturers to drive the transition toward hybrid-electric architectures. By anchoring the hybrid-electric subsystem testing to the UltraFan 30 demonstrator, we see a clear strategy to mature multiple technologies simultaneously. The 2028 ground testing target is ambitious but necessary if these propulsion systems are to reach TRL6 in time to influence the next generation of narrowbody aircraft designs expected in the 2030s.

Sources: Rolls-Royce

Photo Credit: Rolls-Royce

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