 For three years beginning in 1955 he was head of Mechanical Engineering at the Battelle Memorial Institute in Frankfurt, Germany.In late summer of 1938, BMW tested a prototype of the so-called "Kamm-Coupe" based on their 328 chassis.It had a drag coefficient of only 0.25 compared to the great 1940 Mille Miglia winning BMW 328 Touring Coupe with drag coefficient 0.35.