The Federal Aviation Administration (FAA) has awarded Los Angeles-based Heart Aerospace $2.9 million to advance the megawatt-class turbogenerator at the center of its ES-36 regional aircraft propulsion system.

Announced on October 12, 2026, the funding falls under Phase IV of the Continuous Lower Energy, Emissions, and Noise (CLEEN) program. In a press release, Heart Aerospace confirmed it will match the federal grant to fund a $5.8 million, 24-month research and development initiative designated as Project HYPER (Hybrid Propulsion Environmental Readiness).

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Advancing the ES-36 powertrain

Project HYPER focuses on the development and testing of the turbogenerator that forms the backbone of the ES-36 series-hybrid architecture. The aircraft utilizes two 1.65-megawatt electric motors paired with two megawatt-class turbogenerators. This configuration is designed to provide an all-electric range of 125 miles, extending to a targeted hybrid range of 745 miles, including standard reserves.

Heart Aerospace Chief Technology Officer Ben Stabler stated that the FAA partnership will accelerate the development of the hybrid-electric powertrain.

“The FAA’s continued partnership with Heart Aerospace will accelerate development of this key element of the ES-36’s disruptive hybrid-electric powertrain. Together, we are advancing technologies that will help bring to market a new generation of commercial aircraft that use less fuel, produce fewer emissions and make less noise, benefiting passengers, operators and the communities they serve,” Stabler said.

The project will culminate in demonstration flights of the turbogenerator on the pre-production ES-36 aircraft, which is scheduled for its first flight in 2028.

Regulatory pathways for hybrid-electric certification

Beyond hardware development, Project HYPER is structured to generate operational data that will directly inform the FAA’s approach to evaluating and certifying hybrid-electric aircraft. The ES-36 is targeting FAA Part 25 certification, a regulatory standard for transport category aircraft that currently lacks comprehensive precedents for megawatt-scale hybrid propulsion.

Heart Aerospace Head of Corporate Affairs Cole Randle emphasized the dual purpose of the CLEEN funding.

“We’re grateful to the FAA for the agency’s continued investment in Heart’s hybrid-electric powertrain and the technologies needed to bring electric aviation to commercial scale. Through CLEEN, Heart will advance the ES-36 toward flight demonstration while generating knowledge that can help the broader industry understand how to build, test, and certify hybrid-electric aircraft,” Randle said.

The CLEEN program operates as a public-private partnership aimed at accelerating environmentally friendly aircraft technologies. Phase IV launched in September 2026 with two-year agreements awarded to several aerospace manufacturers, including Boeing, GE Aerospace, Honeywell Aerospace, and JetZero.

Evolution from the ES-19 to the ES-36

Heart Aerospace has iterated its aircraft design multiple times to meet regional airline payload and range requirements while pursuing its goal of lowering the cost and environmental impact of air travel. The company initially proposed a 19-seat all-electric aircraft known as the ES-19 before shifting to the 30-seat hybrid-electric ES-30.

On September 23, 2026, the manufacturer unveiled the ES-36 production aircraft. The updated design features a simplified two-nacelle airframe, adding six seats and 1,415 pounds of payload capacity compared to the ES-30. Alongside the unveiling, regional carrier JSX announced a deposit-backed purchase agreement for 50 ES-36 aircraft, accompanied by purchase rights for an additional 50 airframes. Heart Aerospace reports holding over $9 billion in customer commitments from carriers including United Airlines, Air Canada, and JSX.

The ES-36 unveiling followed a major flight test milestone. On August 12, 2026, Heart Aerospace completed the first flight of its X1 demonstrator aircraft at Plattsburgh International Airport (PBG) in New York. The 25,000-pound demonstrator flew entirely on battery power for 27 minutes, reaching an altitude of 1,100 feet.

The FAA has previously backed Heart Aerospace technologies. In September 2024, the agency awarded the company a $4.1 million grant under the Fueling Aviation’s Sustainable Transition (FAST) program to support its Total Hybrid Electric Management and Integration System (THEMIS).

AirPro News analysis

The FAA’s repeated financial backing of Heart Aerospace indicates a strategic regulatory interest in establishing clear certification frameworks for hybrid-electric propulsion under Part 25. By co-funding Project HYPER through the CLEEN program, the FAA gains direct access to operational data from megawatt-class turbogenerators. We view this data-sharing arrangement as a critical step for the regulator, which must develop new compliance methods for series-hybrid architectures before the ES-36 reaches its targeted 2031 entry into service. The knowledge generated here will likely shape future rulemaking for the broader regional hybrid sector.

Japanese eVTOL manufacturer SkyDrive Inc. and MUFG Bank Ltd. launched a joint feasibility study on October 6, 2026, to evaluate the commercial deployment of electric air mobility services across the Kansai region of Western Japan.

Announced in a company press release, the initiative transitions SkyDrive’s advanced air mobility efforts from technical validation to commercial integration. The partnership, which includes Osaka Metro Co. Ltd. and other regional enterprises, aims to establish a sustainable business model under the newly formed “Kansai Air Transportation Network Concept.”

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Developing the Kansai Air Transportation Network Concept

The joint initiative brings together stakeholders across the transportation, aviation, infrastructure, energy, tourism, and financial services sectors. The working group will focus on six core areas required to build next-generation transport infrastructure. These include flight networks and route planning, infrastructure development for vertiports and maintenance facilities, operations and safety management, demand generation, commercial feasibility, and community engagement.

This commercialization push builds on recent infrastructure planning in the region. On October 1, 2026, SkyDrive announced a collaboration with Osaka Metro under a Cabinet Office Super City research project. That study focuses on converting existing rooftop emergency helipads on urban buildings into operational vertiports to support the planned flight network.

SkyDrive’s SD-05 aircraft and financial backing

Founded in 2018 and headquartered in Toyota City, Aichi Prefecture, SkyDrive is developing the SD-05 to serve short-distance urban air mobility markets. The aircraft is a three-seat electric vertical takeoff and landing (eVTOL) vehicle, configured for one pilot and two passengers.

The SD-05 utilizes 12 motor rotors and has a maximum takeoff weight of 1,400 kilograms. It is designed to operate at a maximum cruising speed of 100 km/h, with an operational range between 15 and 40 kilometers. The manufacturer conducted technical validation and demonstration flights of the SD-05 during Expo 2025 Osaka, Kansai, which concluded earlier in the year.

MUFG Bank has been a primary financial supporter of the manufacturer’s development program. In July 2025, the financial institution led an ¥8.3 billion Pre-Series D funding round for SkyDrive, providing the capital required to transition from prototype testing to commercial operational planning. To support this transition, SkyDrive also restructured its executive leadership team on October 1, 2026, to focus on global commercialization.

AirPro News analysis

The transition from technical demonstration to commercial operation remains the primary hurdle for the global eVTOL sector. By formalizing a commercialization study with a major financial institution like MUFG Bank and a regional transit operator like Osaka Metro, SkyDrive is addressing the infrastructure and capital requirements that often stall advanced air mobility projects. The focus on converting existing rooftop emergency helipads into vertiports indicates a pragmatic approach to infrastructure development, bypassing the high costs and zoning challenges associated with building new, dedicated urban landing sites.

Infleqtion, Honeywell Aerospace, and the University of California, Santa Barbara (UCSB) have developed a chip-scale optical cavity prototype that shrinks laser-stabilization hardware from tabletop instruments down to handheld size. The component, fabricated at Honeywell Aerospace’s photonics foundry and announced on October 6, 2026, paves the way for fieldable quantum sensors and timing systems in aerospace applications.

In a press release issued Tuesday, Infleqtion detailed the successful fabrication of the integrated optical cavity on a silicon nitride chip. The milestone leverages semiconductor-style manufacturing processes to enable mass production of compact quantum hardware, targeting precision navigation and atomic timing for both aerospace platforms and commercial infrastructure.

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Miniaturizing quantum hardware for aerospace

Optical cavities serve as critical hardware components that stabilize lasers used in quantum computers, atomic clocks, and quantum sensors. Historically, these components have been large, fragile tabletop instruments. This physical footprint has severely limited their deployment in field environments, mobile platforms, and aerospace applications where space and weight are constrained.

The new prototype utilizes silicon nitride photonic integration processes to reduce the spatial footprint of these systems. By transitioning the optical cavity to a chip-scale format, the collaboration aims to make quantum sensors viable for integration into aircraft, satellites, and remote infrastructure.

Pranav Gokhale, Chief Technology Officer at Infleqtion, stated that while quantum technology holds incredible potential, realizing that potential requires making the systems smaller, more stable, and manufacturable at scale. He described the prototype as a direct result of combining academic research, advanced fabrication capabilities, and deep quantum systems knowledge.

The path to chip-scale production

The foundation for the new optical cavity technology stems from Infleqtion’s January 29, 2024, acquisition of SiNoptiq Inc., a photonic technology startup founded by Dr. Daniel J. Blumenthal. Blumenthal currently serves as Distinguished Professor at UCSB and Chief Photonics Architect for Infleqtion. The design work was conducted jointly by Infleqtion’s engineering team and UCSB’s OCAQ Group, led by Blumenthal, with facilitation by the UCSB Office of Technology & Industry Alliances.

Fabrication took place at Honeywell Aerospace’s photonics foundry, utilizing silicon nitride integration processes the company has developed over the past decade. Honeywell Aerospace provides microelectronics and radiation-hardened integrated circuits for aerospace systems. By using established semiconductor-style manufacturing processes, the optical cavity can be produced at scale across existing commercial facilities rather than requiring bespoke laboratory construction.

Commercial and strategic expansion

The prototype announcement follows a period of structural and strategic expansion for Infleqtion. In 2026, the pure-play quantum technology company became a publicly listed entity on the New York Stock Exchange under the ticker INFQ. The company builds neutral-atom quantum computers, quantum sensing products, and quantum networking systems for commercial customers and US government agencies, including the Department of Defense and NASA.

Beyond hardware miniaturization, Infleqtion is expanding its software and error-correction capabilities. On September 29, 2026, the company signed a Memorandum of Understanding (MOU) with Riverlane to advance quantum error correction and fault-tolerant computing in the United Kingdom. The combined hardware and software developments target applications ranging from precision aerospace navigation to atomic timing for data centers and telecommunications networks.

AirPro News analysis

The transition of quantum hardware from laboratory environments to fieldable aerospace applications hinges entirely on miniaturization and ruggedization. By successfully fabricating an optical cavity on a silicon nitride chip, Infleqtion and Honeywell Aerospace are addressing one of the primary bottlenecks in quantum sensor deployment. We view the use of existing semiconductor foundry processes as particularly significant, as it shifts the production model from bespoke, low-yield manufacturing to scalable commercial fabrication. This capability will be essential for integrating quantum-enabled precision navigation and timing systems into next-generation aircraft and satellites, where size, weight, and power constraints dictate system viability.