Commemorative Air Force - It was #OTD in 1939 that world's first jet-powered aircraft, the Heinkel He 178 V1 (pictured top), made its first flight. Through an odd coincidence, it was exactly
Aerospaceweb.org | Ask Us - First Supersonic Jet
The First Jet Pilots | Air & Space Magazine| Smithsonian Magazine
Henri Coandă: Inventor of the Jet Engine - 3 Seas Europe