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 Wilhelm-Karl of Prussia of the Order pro merito Melitensi of the Sovereign Military Order of Malta. In 1952, Wilhelm-Karl married Armgard von Veltheim (born 17 February 1926). The couple had two sons and a daughter: This page is a translation of the article in the German language Wikipedia. Prince Wilhelm-Karl of Prussia Prince Wilhelm Karl of Prussia ("Wilhelm Karl Adalbert Erich Detloff"; 30 January 1922, in Potsdam – 9 April 2007, in Holzminden) was the third son of Prince Oskar of Prussia, and the last surviving grandson of Wilhelm II, the last German Emperor. He was the thirty-sixth Master of Knights ("Herrenmeister") of