Serving as a full-scale technology demonstrator, the Goldfinch EL-2 eSTOL from Electra.aero validates key innovations in distributed electric propulsion and blown-lift aerodynamics.
These advancements enable fixed-wing aircraft to operate from spaces traditionally accessible only to helicopters, all while offering reduced noise and emissions. The insights gained from the Goldfinch’s flight tests are instrumental in shaping Electra’s forthcoming nine-passenger commercial eSTOL aircraft, slated for FAA Part 23 certification by 2028.
Design & Technology of the Goldfinch EL-2 eSTOL
The Goldfinch’s design centers on a hybrid-electric propulsion system that combines a turbogenerator with high-performance batteries. This configuration powers eight wing-mounted electric motors, facilitating distributed propulsion. The aircraft employs a blown-lift wing design, where propeller-induced airflow over extended flaps enhances lift, allowing for takeoffs and landings in remarkably short distances.
Structurally, the Goldfinch integrates modified wings from a Cessna 172 with a newly designed fuselage and tail assembly. The aircraft features a two-seat cockpit and a T-tail configuration to counteract the pitching moments generated by the blown-lift wing. The hybrid system’s in-flight battery charging capability eliminates the need for ground-based charging infrastructure, enhancing operational flexibility.
Performance & Capabilities of the Goldfinch EL-2 eSTOL
Flight tests conducted at Manassas Regional Airport and Warrenton-Fauquier Airport in Virginia have demonstrated the Goldfinch’s exceptional performance. The aircraft achieved takeoff distances under 170 feet and landing rolls as short as 114 feet. It operated safely at speeds as low as 25 knots during takeoff and landing phases and reached altitudes up to 6,500 feet. The longest recorded flight lasted 1 hour and 43 minutes, showcasing the aircraft’s endurance and efficiency.
In July 2024, the Goldfinch successfully executed takeoffs and landings from a grass field, requiring less than 150 feet of ground roll. This capability underscores its potential for operations in austere environments with minimal infrastructure, a feature particularly valuable for military and remote applications.
Goldfinch EL-2 eSTOL Strategic Implications
The Goldfinch’s successful demonstration of eSTOL capabilities marks a significant milestone in advancing regional air mobility. By enabling operations from short, unprepared fields, the aircraft opens new avenues for connecting underserved areas, reducing travel times, and enhancing logistical operations. The technology’s scalability is evident in Electra’s plans for a nine-passenger variant, which aims to offer a range of up to 500 miles at cruise speeds of approximately 200 mph.
Electra’s collaboration with NASA and participation in programs like the AFWERX Agility Prime initiative highlight the strategic importance of the Goldfinch’s technology in both civilian and defense sectors. The aircraft’s quiet operation and reduced environmental footprint align with broader goals of sustainable and community-friendly aviation.
