PIQUA, Ohio - Hartzell Propeller has received FAA Part 35 Type Certification for the first propeller designed specifically for advanced air mobility (AAM) aircraft. The company worked with aerospace company BETA Technologies to achieve this landmark, conducting all testing of its propeller on BETA’s proprietary electric propulsion systems (electric engines), which are designed and manufactured in-house by BETA, AviationPros reports.
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23 July 2025 - Hartzell Propeller in Piqua, Ohio, has received FAA Part 35 Type Certification for the first propeller explicitly developed for advanced air mobility (AAM) aircraft. The propeller was tested exclusively on BETA Technologies’ in-house electric propulsion systems over four years, including thousands of hours of ground and flight testing. The certification confirms the propeller meets FAA safety and performance standards and is the first of its kind approved for electric propulsion systems. BETA is located in Burlington, Vt.
The five-blade, carbon fiber, ground-adjustable propeller was custom-designed for BETA’s ALIA VTOL and CTOL aircraft, and is also suitable for similar AAM platforms. It supports unique electric flight demands, including regenerative braking and diverse load conditions. The project began in 2021 and involved aerodynamic modeling, design, and validation.
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Jamie Whitney, Senior Editor
Military + Aerospace Electronics
