Vintage, Aeronca Data Plate, Cincinnati, Duplication of Original, Acid Etched! $64.00. $8.80 shipping. Aeronca Champ 4 Set. BOOT-Control Stick Socket Hold Downs, Aluminum 4 Pieces. $24.00. $4.80 shipping. fileslib. Aeronca 7EC Traveler. 1950 brought the introduction of the Aeronca 7EC, which featured the Continental C90 engine of 90 horsepower In 1957, Champion brought out the 7FC, a design sharing many parts, including the engine, with their version of the 7EC. The most significant difference in the 7FC was its tricycle landing gear arrangement.