 He piloted Boeing 747s for Swissair, and later for Swiss International Air Lines.Rossy developed and built a wingsuit system comprising a backpack equipped with semi-rigid aeroplane-type carbon-fiber wings—with a span of about —powered by four Jetcat P400 jet engines, modified from large kerosene-fueled model aircraft engines.This has led to him being referred to in the press by various monikers, such as "The Airman", "Rocketman", "Fusionman", and—most commonly—"Jetman".