The Éclair Propeller and the Wings of France: Marcel Bloch and the Centennial Wings of Dassault Aviation, 1929

Born in Paris and educated at the prestigious École Supérieure d’Aéronautique, Marcel Bloch (1892–1986) demonstrated his aerodynamic genius during World War I by designing the *Hélice Éclair* in 1916—the laminated walnut propeller chosen to equip France’s SPAD VII fighters flown by flying ace Georges Guynemer. In 1929, after observing the rapid advances in monoplane cantilever wings, Bloch established his dedicated aircraft manufacturing enterprise.

During the 1930s, Bloch’s workshops at Courbevoie and Saint-Cloud designed groundbreaking multi-engine aircraft, notably the MB.120 colonial transport and the MB.200 and MB.210 all-metal bombers, which pioneered stressed-skin duralumin construction in France.

Surviving deportation to Buchenwald for refusing to collaborate with the Nazi war machine, Marcel adopted the Resistance codename of his brother—General Paul Dassault (*d’assaut*, “of assault”)—as his family and corporate name upon liberation. In 1949, Dassault flew France’s first production jet fighter, the *Ouragan*, followed by the supersonic *Mystère* and the tailless delta-wing *Mirage III*, which became an international symbol of aerodynamic purity.

Bloch’s architectural maxim—”For an airplane to fly well, it must be beautiful”—remains the company’s guiding principle. Operating from its headquarters along the Seine on Quai Marcel Dassault in Saint-Cloud, Dassault Aviation approaches its 2029 centenary as one of the few aerospace titans worldwide still governed by the visionary lineage of its founder.