https://www.flyingmag.com/dornier-do-31-worlds-first-and-only-vtol-jet-transport-ever-built/
Dornier Do-31: World's First and Only VTOL Jet Transport Ever Built
Apr 28, 2025 - The Dornier Do-31, a vertical takeoff and landing (VTOL) transport aircraft, was developed in West Germany in the 1960s out of concern that a conflict might...
dornier do 31world s first