In 1914 Max F Stupar designed and built two single place biplanes as exhibition ships for Earl Daugherty. The first was powered by a 75hp Curtiss OXX-5, and also a 60hp Kirkham 6, the second one with 50hp Gnôme rotary.
Similar planes were also built for Victor Carlstrom, William Couch, Robert Shank, and other local notables, some likely produced as Chicago Aero’s Star Tractor.
All Aero 