Question: What is the date of death of Rikky Von Opel's father?
Answer: 8 April 1971

He is the son of Fritz von Opel and a great-grandson of Adam Opel, the founder of the German car-maker Opel, today a subsidiary of Groupe PSA. Fritz Adam Hermann von Opel (4 May 1899 – 8 April 1971), known as Fritz Adam Hermann Opel until his father was ennobled in 1917, was the only son of Wilhelm von Opel and a grandson of Adam Opel, founder of the Opel company. He is remembered mostly for his spectacular demonstrations of rocket propulsion that earned him the nickname "Rocket Fritz"