On this day, in 1951, the MD 452 Mystère II made its first flight in Istres with Constantin “Kostia” Rozanoff at the controls.
Using the experience from the Ouragan’s first flights, Marcel Dassault managed to use a pre-production plane to improve its aerodynamic features. On February 11, 1950, he signed a contract to design and build thin-section wings that could fit an MD 450 Ouragan’s fuselage. The MD 452, later renamed Mystère, was thus born.
The fuselage of the Ouragan was altered in the central compartment to receive a different wing, much more swept back (30° instead of 14°) and with reduced relative thickness ratio, such that transonic phenomena would not be encountered until the aircraft reached much higher velocity. The stabilizers, The Mystère II was equipped with the first serial servo-control units manufactured in France (designed and built especially in Saint-Cloud by Dassault).
Jacqueline Auriol was the first woman to break the sound barrier, on August 15, 1953, in the cockpit of a Mystère II.