Lutz Kayser
Lutz Tilo Ferdinand Kayser(March 31, 1939 in Stuttgart, Germany, † November 19, 2017 was a German aerospace engineer, who founded the world's first commercial space launch company, OTRAG. Lutz Kayser is the uncle of German serial entrepreneur Lin Kayser, who sits on the advisory board of the Munich space launcher company Isar Aerospace, and who also works on liquid rocket engines with his company LEAP 71.