12/31/2013. Remarks by Walter van Tilborg: "The Aéro 20 was the only low-wing design of Indraéro SA, a company founded by designers Jean Chapeau and Jean Blanchet. Only a single Aéro 20 was built and this first flew on August 13, 1963 with a 45 hp Salmson 9ADb radial engine. This engine was later replaced by a 90 hp Continental C90 and the aircraft was later also modified into a single-seater, as obvious by the photo, it was restored to a two-seater. The aircraft was still active in 2006."