5. AD-1 Oblique Wing Aircraft It's the weirdest plane ever created by NASA. The wing of this plane is oblique, turned 60-degrees across its fuselage.
The AD-1 Oblique Wing Research Aircraft was designed and made at NASA's Dryden Flight Research Center—located in Edwards, California, in the western Mojave Desert—in the mid-1970s.
Engineers were curious about the aerodynamic characteristics of such a plane, as well as the control laws required to govern it.