Between 1947 and 1952 Rosendahl was an aeronautical consultant and a Vice-President of the Flettner Aircraft Corporation , New York . In 1953 he was appointed Executive Director of the National Air Transport Coordinating Committee , a group set up to study air transport problems in the greater New York area after three crashes in Elizabeth , New Jersey , during 1952
three crashes
American Airlines Flight 6780
Charles E. Rosendahl