Hartzell Propeller has received FAA Part 35 Type Certification for the first propeller designed specifically for advanced air mobility (AAM) aircraft, developed in collaboration with BETA Technologies. The certified propeller was tested exclusively on BETA s proprietary electric propulsion systems, marking a historic milestone for electric aviation.

The approval, which follows four years of development and thousands of hours of ground and flight testing, validates that Hartzell s propeller meets or exceeds rigorous FAA Part 35 performance and safety standards. It is the first FAA type-certified propeller engineered for electric propulsion systems, capable of handling the unique loads and conditions of electric flight, from startup to regenerative braking.

The five-bladed, carbon fiber, ground-adjustable fixed-pitch design was optimized for BETA s ALIA VTOL and ALIA CTOL aircraft, while remaining adaptable for other AAM platforms using similar electric systems. The certification underscores the maturity, safety, and commercial readiness of next-generation electric air transport.

Hartzell Propeller is very pleased to work with BETA Technologies on this AAM breakthrough development, said Hartzell President JJ Frigge. Our design specifically for BETA Technologies will have future applications for the entire AAM industry.

BETA has flown its aircraft with Hartzell s propellers for over four years, achieving multiple industry firsts, including the first crewed eVTOL transition and several long-range demonstration flights, such as a U.S. coast-to-coast journey and the current Grand Tour of Europe.

This partnership shows how legacy aerospace expertise and next-generation innovation can come together to deliver safe, certified, and sustainable flight solutions, said Kyle Clark, Founder and CEO of BETA Technologies.

Source: hartzellprop.com