Blended wing-body visionary James McDonnell sculpted the XP-67 in the early 1940s, promising a speed of more than 400 mph. Boeing Damn Continental engines. No matter how advanced an airframe is ...

The XP-67 Moonbat One of James McDonnell's early concepts, the XP-67 Moonbat was a blended-wing-body design whose performance, thanks to anemic engines, was stamped FAIL.

The aircraft, designated the XP-67 Bat (or alternatively, “Moonbat”), was conceptually advanced. Yet the plane failed to perform. Only one prototype was ever developed, and it was destroyed ...