Heart Aerospace cleared for X1 flight tests
FAA issues experimental airworthiness certificate for hybrid-electric aircraft demonstrator
By Jonathan. S
Heart Aerospace has received a Special Airworthiness Certificate in the Experimental Category (SAC-EC) from the US Federal Aviation Administration (FAA), clearing the company to begin flight testing of its X1 demonstrator aircraft. The approval marks a significant milestone in the development of the company’s hybrid-electric regional aircraft programme and paves the way for the X1’s maiden flight.
The certificate was issued following an FAA inspection of the aircraft at Heart Aerospace’s flight-test facility at Plattsburgh International Airport, New York, where the X1 is undergoing final preparations before entering the flight-test phase. As part of the certification process, the FAA assessed the aircraft, supporting technical documentation and the company’s proposed flight-test programme, concluding more than a year of collaboration between the regulator and the aircraft developer.
The approval follows an extensive ground testing campaign that included structural evaluations, propulsion and systems testing, along with low- and high-speed taxi trials. These tests verified the aircraft’s readiness to transition to piloted flight operations.
Anders Forslund, Founder and CEO, Heart Aerospace, described the certification as a defining moment for the programme. “Earning FAA flight authorization brings the X1 program to the threshold of first flight. This achievement reflects the rigor of the work completed by Heart’s engineering and flight-test teams, as well as the close working relationship we have built with the FAA. With our certificate now in hand, our full focus is on flight. We are ready to get X1 in the air,” said Forslund.
Designed as a full-scale technology demonstrator for Heart Aerospace’s ES-30 hybrid-electric regional aircraft, the X1 will validate flight characteristics, evaluate critical technologies and generate operational data to support certification and future commercial development of the production aircraft.
With a wingspan of 106 feet, a fuselage length of 76 feet and a maximum take-off weight exceeding 25,000 pounds, the X1 is expected to become the largest electric aircraft ever to fly, representing a significant advancement in sustainable regional aviation.
Cole Randle, Head of Corporate Affairs, Heart Aerospace, said the company appreciated the FAA’s collaborative approach in supporting the certification of next-generation aircraft. “The agency’s forward-looking approach to next-generation aircraft is accelerating commercial aviation’s entry into the electric era of flight while supporting Heart’s mission to lower the cost of air travel. We look forward to continuing our work together as we pursue certification of the ES-30,” said Randle.
Heart Aerospace’s production aircraft, the ES-30, is a clean-sheet, 30-seat hybrid-electric regional airliner designed to reduce operating costs and emissions while enabling sustainable regional connectivity. The company says it has secured an order book valued at approximately US$9.4 billion, with commitments from airlines including United Airlines and Air Canada.
Although the X1 is not an eVTOL aircraft, the FAA’s approval represents another important milestone for the broader Advanced Air Mobility (AAM) ecosystem. Progress in certifying hybrid-electric and electric aircraft is helping establish regulatory frameworks, flight-test methodologies and certification pathways that will also benefit emerging eVTOL developers.
For the aviation aftermarket, programmes such as the ES-30 are expected to reshape future MRO requirements by introducing high-voltage electrical systems, battery health monitoring, electric propulsion maintenance and software-driven diagnostics. As electric aviation moves closer to commercial deployment, MRO organisations will need to invest in specialised infrastructure, technician training and new maintenance procedures to support the next generation of sustainable aircraft.
