The Resurgent Propeller
Founded in 1917 by Robert N. Hartzell as the Hartzell Walnut Propeller Company, the conglomerate known today as Hartzell Aviation comprises Hartzell Propeller, Hartzell Aerospace Welding, and Hartzell Engine Tech. By dint of innovation, investment in cutting-edge technologies, and partnerships with forward-thinking air-framers and Advanced Air Mobility (AAM) start-ups, the conglomerate’s flagship division, Hartzell Propeller, has rebounded from the hardships and uncertainty of the late Twentieth-Century and, in 2021, delivered some 3,500 propellers—amounting to roughly 15,000 blades—to aircraft O