115 PS Daimler airship engine of Zeppelin LZ 6, c1909-1910 (1933). In 1909 LZ6 became the first Zeppelin to be used for commercial passenger transport. A photograph from Zeppelin-Weltfahrten, Vom ersten Luftschiff 1899 bis zu den Fahrten des LZ127 Graf Zepplin 1932, Dresden, 1933.