Fifty-years of Fenestron Improvement in the Service of Safety

Abstract

The first prototype SA340 flew the 7th of April 1967 initially with a conventional tail rotor. The initial Fenestron® patents of Mouille and Bouquardez, were quickly followed by the first flight on the Gazelle prototype. In early 1968 the second prototype flew with the Fenestron®. There are more than 5200 helicopters that are flying today with this anti torque concept.