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 Karl Franz of Prussia Prince Karl Franz of Prussia Prince Karl Franz of Prussia (15 December 1916 – 23 January 1975) was the only child of Prince Joachim of Prussia and his wife Princess Marie-Auguste of Anhalt. He was also the grandson of Wilhelm II, German Emperor, himself a grandson of Queen Victoria, which made Prince Karl a great-great-grandson of the British queen. Prince Karl Franz was born on 15 December 1916 in Potsdam. He was the only child born to Prince Joachim of Prussia by his wife Princess Marie-Auguste of Anhalt. Karl Franz was the Emperor's fourth grandchild to be born since World