#Switzerland #RTX #H55 #Sion #Hybrid Electric

H55's Battery Technology and the RTX Hybrid-Electric Flight Demonstrator

H55, a Swiss company specializing in certified electric propulsion systems, has announced significant developments in its 200 kWh energy storage system (ESS) for the RTX hybrid-electric flight demonstrator. This project aims to enhance fuel efficiency by up to 30% for regional aircraft, setting the stage for a future where hybrid technology might become a norm in aviation.

The innovative prototype is spearheaded by Pratt Whitney Canada and Collins Aerospace, focusing on the integration of advanced thermal engines with a powerful 1 megawatt electric motor, alongside H55's state-of-the-art battery systems. This hybrid architecture not only promises efficiency but also innovative safety mechanisms that have been validated through extensive flight operations, providing a robust foundation for future projects.

The Milestone Achievement

In June 2025, H55 marked a significant milestone with the first full power ground test of the RTX demonstrator, solidifying its commitment to advancing hybrid-electric flight. The testing phase is crucial for compliance with aviation safety regulations set by the European Union Aviation Safety Agency (EASA). Rob Solomon, CEO of H55, emphasized the distinction of being chosen to provide the foundational certification for the propulsion system rather than merely serving as a component supplier. He stated, “The architecture that we have tested over 2,000 incident-free hours forms the bedrock of the certification process, allowing the program to progress rapidly.”

The ESS designed by H55 is not only lightweight but modular, facilitating seamless integration within the aircraft, thereby addressing weight distribution concerns effectively. With this design, H55 aims to ensure compliance with aviation certifications that are essential in fostering public trust and safety in electrical propulsion systems.

Continuing the Legacy of Solar Impulse

H55’s roots trace back to the pioneering Solar Impulse project that showcased the viability of electric flight for long durations. This legacy drives H55’s current endeavors to refine and enhance systems of electric propulsion, as they strive to meet the evolving demands of modern aviation. This project extends beyond the immediate goals of the RTX demonstrator; it represents a significant move towards integrating electric Boeing into regional aircraft categories such as Part-25/CS-25.

A Step Towards Commercial Viability

With the RTX demonstrator moving towards full integration and testing on a De Havilland Canada Dash 8-100 aircraft, H55 plans to validate its hybrid-electric propulsion in a real-world environment. This development symbolizes a considerable market expansion opportunity for H55, particularly as the aerospace industry increasingly weighs hybrid-electric architectures for new regional aircraft. H55's systems stand to play a pivotal role in this transformation, enhancing overall efficiency and drastically reducing emissions.

Rob Solomon pointed out, “With programs like this, we can prove that our certifiable battery architecture can transition to the regional aviation market effectively. This is crucial for unlocking the commercial potential of electric propulsion.” Such technological advancements do not merely represent shifts in engineering; they entail a broader societal shift toward sustainability and efficiency within aviation.

Conclusion: The Future of Aviation

This remarkable milestone reaffirms the maturation of electric propulsion technologies and their potential to redefine aviation standards. As hybrid-electric aircraft begin entering service, H55's energy storage systems will become integral to the lifecycle of aircraft operations, creating long-term opportunities for certified propulsion technology providers. The shift toward sustainable air travel is not just a dream; it is rapidly becoming a reality, thanks to the innovational strides taken by companies like H55.

About H55
H55 is a Swiss enterprise dedicated to developing certified electric propulsion systems and energy storage solutions for aviation. By transforming commercial lithium cells into compliant, safe, and repeatable energy storage systems, H55 is paving the way for groundbreaking advancements in electric aviation. Their comprehensive QA processes and stringent regulatory practices ensure the reliability and safety of their technological offerings.