The man that built the FNRS-1 balloon died in what year?
Auguste Piccard Auguste Antoine Piccard (28 January 1884 – 24 March 1962) was a Swiss physicist, inventor and explorer, known for his record-breaking hot air balloon flights, with which he studied Earth's upper atmosphere and cosmic rays, and for his invention of the first bathyscaphe, "FNRS-2", with which he made a number of unmanned dives in 1948 to explore the ocean's depths.
Max Valier Max Valier (February 9, 1895 – May 17, 1930) was an Austrian rocketry pioneer. He helped found the German "Verein für Raumschiffahrt" (VfR - "Spaceflight Society") that would bring together many of the minds that would later make spaceflight a reality in the 20th century.