Robert Esnault-Pelterie
Robert Albert Charles Esnault-Pelterie (French pronunciation: [ʁɔbɛʁ albɛʁ ʃaʁl eno pɛltəʁi]; 8 November 1881 – 6 December 1957) was a French aircraft designer and spaceflight expert. He is known as one of the early pioneers of modern rocketry and astronautics, along with Russian Konstantin Tsiolkovsky, Chinese Qian Xuesen, German Hermann Oberth, German Wernher von Braun, and American Robert H. Goddard.