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 Augustus William of Prussia two brothers led to a correspondence, which was published in 1769. Augustus died suddenly in 1758 at Oranienburg, according to some of "a broken heart", in reference to his brother Frederick II's harsh treatment of him for his incompetent military leadership in the Battle of Kolin. In reality, he died from a brain tumor. Augustus married Luise of Brunswick-Wolfenbüttel. Because his older brother had no children, Augustus's oldest son inherited the throne as Frederick William II of Prussia on Frederick's death. Prince Augustus William of Prussia Augustus William of Prussia (German: "August Wilhelm"; 9 August 1722 – 12 June 1758)