Opel-Sander RAK.1 Rocket-Powered Glider from Czech Master Resins by Mark Davies The Opel-Sander RAK.1 was designed by an engineer named Hatry, and first flown at Frankfurt-Rebstock on September 30th, 1929. It was a rocket powered glider, and one of a series of experiments in rocket-powered propulsion by car-magnate Fritz von […]