Dr. Heinz Günter Klug passed away last fall. On Oct. 12, 2015, the long-time pioneer of hydrogen technology died at the age of 78. The mechanical engineer, who was born in Mainz, provided important contributions to hydrogen engine testing for aircraft during his time as project head at Airbus. Twenty years ago, he was one of the founding members of the German Hydrogen and Fuel Cell Association. Klug, who last lived in Hamburg, was the coordinator of the Europe-wide Cryoplane research project before he retired in 2002. He delivered many groundbreaking ideas, especially regarding hydrogen as aviation fuel. HG – how his name was often abbreviated – spent his spare time travelling the seas, painting and taking photographs.