Erich Übelacker was a German automobile engineer.
Erich Übelacker with Tatra 77a coupe, 1935
Hans Ledwinka was an Austrian automotive designer.
Ledwinka in 1942
Hans Ledwinka in front of a Tatra T87
Backbone chassis, developed by Hans Ledwinka in 1923 for Tatra. The company uses the concept to this day.
Tatra 111, designed for the Wehrmacht by Hans Ledwinka