Career
He was also the first person to hold an aeronautical certificate in Sweden, issued in 1905. The background for this might be that he was the son-in-law of the famous polar explorer Adolf Erik Nordenskiöld. He was also a relative of the Swedish philosopher Emanuel Swedenborg, and his famous last name gave a certain prestige to the expedition.
Swedenborg left for Paris in March 1897 together with Knut Frænkel where they received training in ballooning by Henri Lachambre, the manufacturer of the balloon "The Eagle" that was to be used in the polar expedition.
However, the expedition never needed his efforts, and after the balloon took off from Danskøya, he went home to Sweden where he followed a military career. He also became a famous balloonist and among others, he flew together with Hans Frænkel, the brother of Knut Frænkel.
Together with Hans Frænkel and Eric Unge he set a Swedish record in long-distance flying with balloon. In 14½ hours they flew 760 km.
This record remains unbeaten.
When the remains of the Andrée-expedition were found in 1930, the dead were transported to Sweden. The aging lieutenant colonel Swedenborg (he was retired in 1921) was part of the honour guard when the bodies were received in Sweden. A display of heraldic grief unmatched until the assassination of Olof Palme almost 60 years later.