The Fauvel AV.50 Lutin (English: Elf) (originally designated the AV.61) was a design for an unorthodox light aircraft produced in France in the 1970s. Like some other Charles Fauvel designs, it was a tailless aircraft with a reverse-delta wing. In this case, it was a single-seater intended to be powered by a converted Volkswagen engine. Only one example was known to have been under construction by 1977, in Australia. Options for the builder included the use of a Rotax engine in place of the Volkswagen unit, and a choice of tandem, tailwheel, or tricycle undercarriage.