05/31/2018. Remarks by Walter van Tilborg: "The AD-01 homebuilt aircraft was designed and constructed by Paul Daurelle of Carpentras, France. The single-seater was an original design of all-metal construction, featuring full-span flaperons. Powered by a 40 hp Rotax 447 two-stroke engine the aircraft was first flown on May 14, 1988 and only a single example was constructed."