USAF: Paul Hill, Propulsion and Practicality
USAF: Paul Hill, Propulsion, and Practicality Following the failed Avro-Canada craft, “official” interest in saucers didn’t die, but it did diminish to a low simmer. Many experts grew skeptical. And then there was the American mechanical and aeronautical engineer Paul R. Hill (1909–90), who joined the National Advisory Committee of Aeronautics (NACA) in 1939. He … Read more