The LZ 2 was a German experimental airship constructed by Luftschiffbau Zeppelin and first flown in 1906. It was the true ancestor of later Zeppelin airship designs. The major mistake made by Kübler in the design of the LZ 1 were not repeated: the designer, Ludwig Dürr, who was to head the design of all subsequent Zeppelins, used triangular-section girders instead of Kübler's flat girders, and elevators instead of the lead weight to control pitch.  Though the life of the LZ 2 was brief, consisting of only two flights, its near sister ship, the LZ 3, which first flew on 9 October 1906 and was purchased by the German Army and operated as the Z I until 1913. Before being purchased by the Army, LZ 3 made many flights and carried a number of influential passengers, including the German Crown Prince.