Prince Gustaf Adolf Oscar Fredrik Arthur Edmund , Duke of Västerbotten ( 22 April 1906 – 26 January 1947 ) was a Swedish prince , directly in line of succession to the Swedish throne . He was the eldest son of Gustaf VI Adolf , who was crown prince for most of his son 's life and ascended the Swedish throne three years after his son 's death . The current king , Carl XVI Gustaf , is Prince Gustaf Adolf 's son . The prince was killed on 26 January 1947 in an airplane crash at Kastrup Airport , Copenhagen , Denmark
airplane crash
1947 KLM Douglas DC-3 Copenhagen accident
Prince Gustaf Adolf, Duke of Västerbotten