The Nazi Flying Wing, interesting article but what really caught my attention was:
In 1937, Reimar Horten decided that the ultimate flying-wing shape would be a parabola—a wing with a near-circular leading edge planform, which would provide the minimum induced drag and maximum lift. The Hortens built just one parabola-wing glider but never flew it; the airplane was torched after warping and becoming unglued during winter storage. But wait, there’s more: Supposedly the AAF found out about the Horten parabola wing and decided to build a powered version to secretly test Reimar’s theory. It was this airplane, looking uncannily like two-thirds of a flying saucer, that crashed in New Mexico in 1947.
Nobody has yet explained the aliens, however.
WHAT IF THE NAZIS HAD ACTUALLY BUILT THE HORTEN HO-229 JET FLYING WING?
Reimar Horten and his older brother Walter were German aircraft homebuilders. Their relatively short aircraft-building careers extended from 1933 until the end of World War II, though they did some minor work in Argentina after the war as expatriate Nazis. Had they lived 40 years later, chances are they would have been busy members of an EAA chapter in Germany, making a living selling kits for their high-performance flying-wing sailplanes.
The Hortens weren’t Burt Rutans. Talented, yes, but not the aeronautical geniuses they’ve been called by some. They built a series of increasingly sophisticated iterations of the same basic design—graceful sweptwing, tailless gliders, though several of their wings were powered. The Hortens produced a grand total of 44 airframes of their dozen basic designs. History has portrayed them as aeronautical visionaries, for in 1940 Messerschmitt Me-109 pilot Walter Horten, who scored seven
Battle of Britain victories as Adolf Galland’s wingman, proposed putting a pair of Germany’s new axial-flow jet engines into a Horten glider. The result was the Ho IX. (Brother Reimar was the aerodynamicist and designer; Walter was the facilitator, eventually holding an important Luftwaffe position that allowed him to divert government supplies, staff and facilities for his brother.)
The jets were first going to be two BMW 003s, but when they underperformed the Hortens switched to Junkers Jumo 004Bs. The Ho IX V2 (
Versuch 2, or Test 2—the V1 was an unpowered research glider) officially flew three times, crashing fatally at the end of the third flight when one of its two Jumos failed.
No Horten IX ever flew again, but the brothers had undeniably built and tested the world’s first turbojet flying wing. The Ho IX V2 first flew in March 1945, more than three and a half years before Northrop’s eight-jet YB-49 flying-wing bomber took off. In a number of ways, the Hortens were well ahead of Jack Northrop and his engineers, though Northrop never admitted that. After the war, it was suggested to Northrop that he hire the brothers. “Forget it, they’re just glider designers,” he said condescendingly. The success of the Ho IX was pointed out to him, but Northrop dismissed it as a Gotha design, not a Horten. ...
https://www.historynet.com/horten-brothers-jet-flying-wing/