Jack Northrop's idea of a low-drag bomber for long range led to the wild and unearthly YB-35 and YB-49 "Flying Wing" prototypes in the 1940's. The YB-35 was the first version, powered by piston engines. When it soon became apparent that jet engines were the wave of the future, several prototypes were converted to jet power and renamed YB-49. Unfortunately, stress fatigue on the airframe and lack of speed, as well as control issues, doomed the prototypes, and when the government cut funding, all of the prototypes of both versions were scrapped.

This was a great model kit made by Italeri, that is a refreshed and revised kit that AMT/Ertl had years ago. It's also an expensive kit; be prepared to shell out $70 if you want to add it to your collection.