Upon coming of age on 19 July 1905, he assumed full constitutional powers. He proved loyal to the Emperor and was deemed a constitutionally-minded prince. However, he soon deviated from his early liberal views and gave in to autocratic impulses, also becoming dependent on advisers at his two courts at Gotha and Coburg, between which political differences and rivalries had developed. He liberally supported the court theatres in both towns. Taking an interest in Zeppelin and aeroplane technology, Charles Edward supported the newly created aircraft industry at Gotha (see "Gothaer Waggonfabrik"). Like all Dukes of Saxe-Coburg and Gotha, he divided his time between the two towns. Among his residences Schloss Friedenstein, Ehrenburg Palace, and Schloss Callenberg, he favoured the last. He also took great interest in the renovation of Veste Coburg which had been abandoned as a ducal residence in the 17th century. This work, which strained the ducal finances, was ongoing from 1908 until 1924.