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Founded in 1917 and headquartered in Piqua, Ohio, Hartzell Propeller is the global leader in advanced aircraft propeller design and manufacturing technology for general aviation applications — both piston engine and turboprop — as well as custom propulsion solutions for electric, hybrid-electric aircraft, and advanced air mobility programs. In 2021, Hartzell Propeller acquired Tanis Aircraft Products, expanding Hartzell’s heating products to include systems for propeller de-ice, piston engine preheat, turbine engine preheat, helicopter preheat, battery, avionics, and cabin preheat.

Hartzell Aerospace Welding provides quality aviation exhaust systems and custom metal fabrication backed by the expertise of trusted aviation companies Aerospace Welding Minneapolis, Inc. (AWI), Aerospace Manufacturing, Inc. (AMI), and Acorn Welding, including its Seaplanes West division. As the world leader in aircraft exhaust systems and engine mounts, the company’s core competencies include certified welding, precision machining, and sheet metal fabrication.