The man that built the FNRS-1 balloon died in what year?
FNRS-1 The FNRS-1 was a balloon, built by Auguste Piccard, that set a world altitude record. It was named after the Belgian Fonds National de la Recherche Scientifique, which funded the balloon.
Hugo Kaulen Hugo Kaulen, Sr. (October 28, 1869 - July 9, 1954) was a pioneering German balloonist.