Siegfried Knemeyer
Siegfried Knemeyer ( 5 April 1909 – 11 April 1979 ) was a German aeronautical engineer , aviator and the Head of Technical Development at the Reich Ministry of Aviation of Nazi Germany during World War II . 
<triplet> Siegfried Knemeyer <subj> 5 April 1909 <obj> date of birth <subj> 11 April 1979 <obj> date of death <triplet> Reich Ministry of Aviation <subj> Nazi Germany <obj> country <subj> World War II <obj> conflict <triplet> Nazi Germany <subj> World War II <obj> participant in