The Horten H.IX, RLM designation Ho 229 (often called Gotha Go 229 due to the identity of the chosen manufacturer of the aircraft) was a late-World War II prototype fighter/bomber designed by Reimar and Walter Horten and built by Gothaer Waggonfabrik. It was the first pure flying wing powered by a jet engine and designed to be more difficult to detect with radar - the first aircraft to incorporate what is now known as stealth technology. It was a personal favorite of German Luftwaffe chief Reichsmarschall Hermann Göring, and was the only aircraft to come close to meeting his "1000, 1000, 1000" performance requirements. Its speed was estimated at 1,024 kph (636 mph) and its ceiling 15,000 meters (49,213 ft).

Horton Ho 229 prototype (probably V2) preparing for test flight.