Opel-Sander RAK.1 rocket glider, Frankfurt-Rebstock, Germany, Sept. 30 1929

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The Opel RAK.1 (also known as the Opel RAK.3) was the world's first purpose-built rocket-powered aircraft.
It was designed and built by Julius Hatry under commission from Fritz von Opel, who flew it on September 30, 1929 in front of a large crowd at Rebstock airport near Frankfurt am Main.