Technology & Innovation
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.
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.
Sources
Photo Credit: Collins Aerospace
Sustainable Aviation
ZeroAvia Leads HyPRIME Liquid Hydrogen Refuelling Project
ZeroAvia leads Project HyPRIME, backed by over £2 million in UK funding to test mobile LH2 refuelling at commercial airports.
ZeroAvia is leading a newly formed consortium to develop and test a mobile liquid hydrogen (LH2) refuelling vehicle at commercial airports in the United Kingdom, backed by over £2 million in government funding.
The initiative, known as Project HyPRIME (Hydrogen Propulsion Refuelling Infrastructure Mobile Ecosystem), was officially announced by the UK Department for Transport (DfT) and Innovate UK on July 23, 2026. ZeroAvia formally highlighted its leadership of the project on August 4, 2026. The consortium aims to demonstrate that hydrogen-electric aircraft can be refuelled within standard commercial turnaround times.
Advancing liquid hydrogen infrastructure
The HyPRIME consortium includes ZeroAvia as the lead partner, alongside ULEMCO Ltd, GeoPura Ltd, Bristol Airport Ltd, and Birmingham Airport Ltd. The group is tasked with designing, building, and testing a mobile refuelling system capable of supporting commercial hydrogen-electric aircraft operations.
A key technical objective of the project is the capture and utilization of “boil-off” hydrogen. Rather than venting this gas, the system will redirect it to fuel hydrogen-powered Ground Support Equipment (GSE), such as aircraft tugs, and on-site power generation units. The findings from these tests will inform future regulatory, safety, and infrastructure investment decisions for scaling LH2 fuel across the UK aviation sector.
Airport integration and sustainability targets
Testing and demonstrations for the mobile refuelling vehicle will take place in live commercial airport environments at Birmingham Airport (BHX) and Bristol Airport (BRS). Integrating cryogenic fuels into active aprons requires coordination with regulators, including the UK Civil Aviation Authority (CAA), to establish safe handling procedures.
Tom Denton, Head of Sustainability at Birmingham Airport, stated that hydrogen electric aircraft are progressing quickly and airports need to understand how the fuel can be safely and efficiently integrated into daily operations.
“HyPRIME gives us the opportunity to test procedures and build the knowledge required to support future zero emission flights from Birmingham. Taking part in this project helps us maintain the momentum we’ve built over the past few years and moves us that bit little closer to achieving our mission of running a lower carbon airport,” Denton said in a press release.
Birmingham Airport recently reported an 11% reduction in location-based greenhouse gas emissions for 2025/26 and has set a target year of 2033 to achieve net zero carbon emissions from its direct operations. Bristol Airport is also expanding its hydrogen footprint, having been announced on July 23, 2026, as a partner in the CHOSAN (Cryogenic Hydrogen Optimised Systems for AviatioN) project, which aims to deliver the first flight of a liquid hydrogen-powered aircraft from a UK commercial airport.
Government funding and strategic partnerships
Project HyPRIME is funded under the UK Government’s Zero Emission Flight Demonstrator Programme. According to Bristol Airport, the total funding pool for the program is £8 million. Reporting by BusinessGreen indicates that over £2 million of that total was specifically awarded to the HyPRIME initiative.
The announcement follows a series of strategic agreements for ZeroAvia in July 2026. On July 8, 2026, the company announced a collaboration with Marshall Aerospace to explore hydrogen-electric capabilities for military and defense platforms. On July 17, 2026, ZeroAvia and Safran forged a partnership to develop high-temperature hydrogen fuel cells for aviation applications.
AirPro News analysis
We view Project HyPRIME as a necessary step in bridging the gap between hydrogen aircraft development and practical airport operations. While powertrain technology has advanced rapidly, the logistical challenge of handling cryogenic liquid hydrogen on a busy commercial apron remains a significant hurdle. By testing boil-off capture for GSE, the consortium is addressing both safety and economic efficiency. Proving that LH2 can be managed within standard turnaround times without disrupting existing airport operations will be essential for securing regulatory approval and driving future infrastructure investments.
Sources: ZeroAvia
Photo Credit: ZeroAvia
Sustainable Aviation
Lufthansa Group Earns EMAS Certification Across Three Airlines
Lufthansa Airlines revalidated under EMAS for 2025, while Lufthansa City Airlines and Lufthansa Aviation GmbH certified for the first time.
Lufthansa Airlines (LH) has secured revalidation under the European Union’s Eco-Management and Audit Scheme (EMAS) for the 2025 reporting year, while Lufthansa City Airlines and Lufthansa Aviation GmbH achieved the environmental certification for the first time.
In a press release issued on August 6, 2026, the Lufthansa Group announced the certifications, confirming the operators are implementing measurable environmental measures across flight operations and ground processes. The EMAS system is a voluntary European Union (EU) instrument that fully incorporates the requirements of the ISO 14001 international environmental management standard.
Operational efficiency and fuel savings
The validation process evaluated the airlines’ progress in reducing their environmental footprint. According to the company, the 2026 Environmental Statement emphasizes operational fuel efficiency. The report details how specific measures implemented from the flight planning stage through to landing result in measurable kerosene savings.
Broader climate technology initiatives
The EMAS validations follow several recent environmental technology initiatives across the Lufthansa Group. On July 30, 2026, the company announced it is testing a next-generation “AeroSHARK” surface film on a Lufthansa City Airlines Airbus aircraft. The film is designed to reduce aerodynamic drag and lower fuel consumption.
Earlier in the year, on May 20, 2026, the group expanded its climate protection portfolio to include Direct Air Carbon Capture and Storage (DACCS) technologies. This initiative involves partnerships with aerospace manufacturer Airbus and climate technology company Climeworks to filter carbon dioxide directly from ambient air.
AirPro News analysis
The addition of Lufthansa City Airlines to the EMAS registry indicates that the Lufthansa Group is prioritizing environmental compliance for its newer subsidiaries from their inception. Because EMAS requires public environmental reporting and continuous performance improvement beyond standard ISO 14001 compliance, maintaining this validation requires sustained capital investment in fuel-saving technologies like the AeroSHARK film and DACCS partnerships. We expect European operators to increasingly leverage voluntary frameworks like EMAS to demonstrate regulatory readiness ahead of stricter EU aviation emissions mandates.
Sources: Lufthansa Group
Photo Credit: Lufthansa Group
Technology & Innovation
Sarla Aviation Adopts Siemens Xcelerator for eVTOL Certification
Sarla Aviation integrates Siemens Xcelerator tools to support eVTOL certification and a 2028 commercial air taxi launch in Bengaluru.
Indian urban air mobility startup Sarla Aviation has adopted the Siemens Xcelerator software portfolio to accelerate the design and certification of its next-generation electric vertical take-off and landing (eVTOL) aircraft.
Announced in a press release on August 5, 2026, the partnership integrates Siemens Digital Industries Software into Sarla Aviation’s development pipeline. The integration aims to streamline the complex engineering and regulatory validation processes required for aerospace Certification, supporting the startup’s target of launching commercial air taxi operations in Bengaluru by 2028.
Digital integration for aerospace certification
Sarla Aviation will utilize multiple components of the Siemens Xcelerator portfolio, including Designcenter, Simcenter, Capital, Polarion, and Teamcenter. By implementing a comprehensive digital thread, the manufacturer intends to reduce physical design iterations through early-stage simulation and improve engineering collaboration across its teams.
A primary driver for the software adoption is the stringent regulatory environment for new aircraft. The Siemens toolset is specifically designed to support complex traceability, verification, and validation processes, including compliance with the DO-178C standard for airborne software certification.
“By adopting a comprehensive digital thread using the Siemens Xcelerator portfolio, companies like Sarla Aviation are able to help accelerate development, improve collaboration and support certification processes for next-generation aircraft,” said Mathew Thomas, Vice President and Managing Director for India at Siemens Digital Industries Software.
Advancing India’s urban air mobility ecosystem
The software partnership follows a series of technical and financial milestones for the Bengaluru-based startup. In July 2026, Sarla Aviation successfully completed flight tests of Sylla, its electric eVTOL technology demonstrator. The company reported that the testing validated integrated aircraft systems and controlled hover capabilities for what it describes as India’s largest and heaviest eVTOL demonstrator.
Financial backing for the development program expanded earlier in the year. In April 2026, IndiGo Ventures, the corporate venture arm of Indian airline IndiGo, made a strategic ₹100 million (approximately US$1.2 million) investment in Sarla Aviation. While IndiGo noted the investment does not signal a near-term entry into eVTOL operations, it positions the airline to explore India’s future air mobility ecosystem.
Sarla Aviation Co-Founder & CTO Rakesh Gaonkar stated that working with Siemens supports the company’s ability to innovate faster. He noted the ambition is to make electric air mobility accessible at scale while maintaining high standards of safety and performance.
AirPro News analysis
The transition from flying technology demonstrators to certifying a production aircraft is the most capital-intensive and high-risk phase for any eVTOL developer. By embedding enterprise-grade aerospace software early in its development cycle, Sarla Aviation is signaling a shift toward the rigorous documentation and traceability required by aviation regulators. Compliance with DO-178C is a notorious bottleneck for new aerospace entrants. We view the adoption of established certification management tools as a necessary step if the company intends to meet its ambitious 2028 commercial launch target in Bengaluru. The recent capital injection from IndiGo Ventures provides the financial runway to implement these foundational engineering systems.
Sources: Siemens
Photo Credit: Sarla Aviation
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