In the late 1920s, German car company Opel led attempts to build the first rocket powered cars. Their first prototype was the Opel Rak.1, which recorded its top speed on March 15, 1928. How fast did it go?
Answer: A mere 47 mph. The rocket cars quickly improved however as the second edition, the Opel Rak.2, reached 143 mph. Opel also tested rocket gliders and a rocket train.
Source: To a Distant Day by Chris Gainor




