Prince Henry of Prussia (1862–1929) became the club's patron. Henry was interested in motor cars as well and supposedly invented a windshield wiper and, according to other sources, the car horn. In his honor, the "Prinz-Heinrich-Fahrt" (Prince Heinrich Tour) was established in 1908, like the earlier Kaiserpreis a precursor to the German Grand Prix. Henry and his brother William gave patronage to the Kaiserlicher Automobilclub (Imperial Automobile Club). Henry also was an early proponent of introducing submarines and airplanes. He had merchant ships converted into seaplane tenders for operations in the Baltic Sea. Henry respected his brother, but this attitude was not returned in the
Prince Friedrich Karl of Prussia (1893–1917) where he died from his injuries on 6 April 1917 at Saint-Étienne-du-Rouvray. Prince Friedrich Karl of Prussia (1893–1917) Prince Friedrich Karl of Prussia (Tassilo Wilhelm Humbert Leopold Friedrich Karl; 6 April 1893 – 6 April 1917) was a German prince and competitive horse rider who competed in the 1912 Summer Olympics. Prince Friedrich Karl was born in Schloss Klein-Glienicke, Potsdam, Berlin. He was the son of Prince Friedrich Leopold of Prussia (1865–1931) and Princess Louise Sophie of Schleswig-Holstein-Sonderburg-Augustenburg (1866–1952) and a grandson of Prince Frederick Charles of Prussia. He was a member of the 1912 German Olympic equestrian team, which