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 Louis Charles of Prussia Prince Louis Charles of Prussia Prince Louis Charles of Prussia (; Potsdam, 5 November 1773 – Berlin, 28 December 1796) was the second son and third child of Frederick William II of Prussia and Frederika Louisa of Hesse-Darmstadt. On 26 December 1793 in Berlin, Prussia, Prince Louis married HSH Duchess Frederica of Mecklenburg-Strelitz, youngest daughter of Charles II, Grand Duke of Mecklenburg-Strelitz and sister of Louise of Mecklenburg-Strelitz, wife of his brother Frederick. They had three children: Prince Louis Charles died aged 23 from diphtheria. His widow went on to marry twice more, becoming Queen of Hanover by her last