Heart Aerospace X1

History

The Heart Aerospace X1 is a full-scale battery-electric aircraft demonstrator developed to test electric propulsion, integrated aircraft systems, and flight-test methods at a scale relevant to regional airliners. The aircraft supports development of Heart Aerospace's planned 30-seat ES-30 hybrid-electric regional airliner.

X1 is not intended for passenger service. Heart Aerospace uses the demonstrator to collect flight data and develop capabilities for designing, building, integrating, testing, and operating large electric aircraft.

The aircraft completed its first flight on 12 August 2026 from Plattsburgh International Airport in New York. The 27-minute piloted flight reached 1,100 ft (335 m) above ground level and included taxi, takeoff, climb, maneuvering, and landing.

Development and ground testing

Heart Aerospace revealed the full-scale X1 demonstrator in 2024. The program subsequently progressed through ground handling, turnaround, structural, propulsion, and taxi testing. Heart states that X1 was developed as a clean-sheet aircraft configured around electric propulsion and electrified systems. The program integrated batteries, power electronics, electric propulsion, flight controls, avionics, structures, and other aircraft systems into a complete flying demonstrator. Technical information and imagery are published by Heart Aerospace.

Before flight testing, the Federal Aviation Administration issued X1 a Special Airworthiness Certificate in the Experimental Category. The authorization followed an inspection of the demonstrator at Plattsburgh International Airport and an extensive ground-test program. The certification milestone was reported before the first flight by Robb Report.

First flight

On 12 August 2026, X1 departed Heart Aerospace's flight-test base at Plattsburgh International Airport. Its battery-electric propulsion system delivered more than 1 MW of power during the flight. Independent reports from Aerospace Testing International and AviTrader confirm the 27-minute duration, 1,100 ft flight altitude, and experimental FAA authorization.

At takeoff, X1 weighed more than 11,340 kg (25,000 lb). Heart Aerospace described it as the largest battery-electric aircraft to have flown. The company also reported that the aircraft consumed approximately US$5 worth of electricity during the mission. This figure represents the demonstrator flight and is not a direct measure of future ES-30 operating costs.

Relationship to the ES-30

X1 is representative in scale of the ES-30 program but does not use the production aircraft's planned propulsion architecture. X1 operates entirely on battery power, while the ES-30 is being developed as a 30-seat hybrid-electric regional aircraft. Data from X1 is intended to support development and flight testing of the production design.

Heart Aerospace is developing its first pre-production ES-30 at its pilot manufacturing facility in Los Angeles. Flight testing of that aircraft is scheduled to begin in 2028, while entry into service is targeted for 2031. The company plans to pursue FAA Part 25 certification for the ES-30.

Design

X1 is a full-scale fixed-wing demonstrator with a wingspan of 32 m (106 ft), a length of 23 m (76 ft), and a height of approximately 7.3 m (24 ft). Its takeoff weight exceeds 11,340 kg (25,000 lb). Heart Aerospace describes the aircraft as a clean-sheet design developed specifically around electric propulsion and electrified aircraft systems.

Electric propulsion

The demonstrator is powered entirely by batteries and uses four wing-mounted electric motors. During its first flight, the propulsion system delivered more than 1 MW of electrical power. The program is intended to validate electric propulsion under realistic flight conditions and to examine integration from the electric motors and batteries through power electronics and aircraft systems.

Flight-test configuration

X1 is configured for a single pilot. Heart Aerospace defines a controlled test envelope with a never-exceed speed of 140 knots, a maximum altitude of 2,000 ft above ground level, and a maximum maneuver load of 1.5 g. Its flight-test base is Plattsburgh International Airport.

The aircraft has also been used for ground-support, aircraft-turnaround, structural, propulsion, and systems-integration work. Heart Aerospace installed cabin and cockpit mockups during the development program, but X1 remains an experimental demonstrator rather than a passenger-carrying production aircraft.

Program status

Following the first flight in August 2026, X1 entered the flight-test phase of Heart Aerospace's electric-aircraft development program. The demonstrator provides flight data and operational experience that can be transferred to development of the ES-30 and its associated manufacturing, integration, certification, and flight-test processes.

Heart Aerospace expects electrification to reduce operating costs for future regional aircraft through lower energy expenditure, simplified electric propulsion, reduced maintenance requirements, and higher aircraft availability. These are development targets for the ES-30 and have not yet been demonstrated in airline service.

Specifications (Heart Aerospace X1)

General characteristics

• Type: Full-scale battery-electric aircraft demonstrator
• Flight crew: 1 pilot
• Length: 23 m (76 ft)
• Wingspan: 32 m (106 ft)
• Height: approximately 7.3 m (24 ft)
• Takeoff weight: more than 11,340 kg (25,000 lb)
• Propulsion: four wing-mounted electric motors powered entirely by batteries
• Electrical propulsion power demonstrated: more than 1 MW

Flight-test envelope

• Maximum speed (VNE): 140 knots
• Maximum altitude: 2,000 ft above ground level
• Maximum maneuver load: 1.5 g
• Test base: Plattsburgh International Airport, New York

First-flight data

• Date: 12 August 2026
• Duration: 27 minutes
• Maximum reported altitude: 1,100 ft (335 m) above ground level
• Test profile: taxi, takeoff, climb, maneuvering, and landing
• Airworthiness authorization: FAA Special Airworthiness Certificate, Experimental Category

Related equipment

• Heart Aerospace ES-30: Planned 30-seat hybrid-electric regional airliner whose development is supported by data and engineering experience from the X1 program.