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Unique mixed-propulsion eVTOL completes transition flight testing

Unique Mixed-Propulsion eVTOL Completes Transition Flight Testing
China’s TCab Tech has reached a pivotal milestone with the successful completion of transition flight tests for its full-scale E20 eVTOL demonstrator. This achievement validates the aircraft’s capability to manage the most complex phase of its flight envelope—transitioning from vertical hover to forward cruise—a critical requirement for any electric vertical takeoff and landing (eVTOL) air taxi aspiring to commercial operation.
Advancing a Novel Propulsion System
Based in Shanghai, TCab Tech has been steadily progressing toward this objective since conducting transition tests with a sub-scale prototype in 2022. Earlier this year, the company completed its first crewed hover flight, with the CEO aboard. Since 2021, TCab has conducted approximately 1,000 flight tests across various E20 prototypes, refining a distinctive propulsion system that integrates multiple VTOL concepts.
Unlike conventional lift-and-cruise designs, which employ separate fixed propellers for vertical and horizontal flight, or vectored thrust systems such as those on the Joby S4 that tilt rotors to transition between flight modes, the E20 combines both approaches. The aircraft is equipped with four tilting propellers and two coaxial stacks of fixed vertical lift propellers. The outer tilting propellers are mounted on the wing tips, incorporating elements of tilt-wing technology as well.
Transition flights represent one of the most demanding phases for eVTOL aircraft, requiring precise coordination of multiple systems to shift from rotor-based lift to wing-borne flight. The E20’s design addresses these challenges through built-in redundancies, including four battery packs and six motors. The aircraft is configured to seat four passengers and a pilot, featuring amenities such as gull-wing doors, a dedicated luggage compartment, and 270-degree panoramic glass. It boasts a top speed of 200 mph (320 km/h) and a range of 125 miles (200 km). TCab asserts that its 800-volt fast-charging system can recharge the E20’s batteries from 20% to 85% in just 20 minutes, facilitating rapid turnaround between flights.
Positioning Amidst Intensifying Global Competition
TCab’s progress unfolds amid intensifying global competition in the urban air mobility sector. In the United Arab Emirates, Archer Aviation recently completed transition flight testing for its mixed-propulsion Midnight eVTOL, though it continues to face challenges including regulatory approval, safety validation, and integration with existing air traffic management systems. The broader market is witnessing increased investor interest, while established players such as Joby Aviation and other Chinese firms accelerate their development and certification efforts.
Upon certification, TCab will enter a crowded Chinese market that includes competitors like eHang, which already operates a certified pilotless commuter aircraft and is expanding its network of urban landing sites. The competitive landscape is further shaped by ongoing regulatory processes, including the FAA’s Type Certification, and the industry’s gradual shift toward autonomous commercial air operations.
As eVTOL manufacturers race to achieve certification and commercial deployment, milestones such as TCab’s successful transition flight testing represent crucial progress toward the realization of urban air mobility.

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