It's an X plane, and it's unmanned. If propulsion fails, it will presumably crash in the desert. Some of the press on this talks about weight savings. If they'

It's an X plane, and it's unmanned. If propulsion fails, it will presumably crash in the desert. Some of the press on this talks about weight savings. If they're really serious about that, well... none of their flights are intended to go above Mach 0.7. Possibly they could deploy a ballistic parachute like Cirrus airplanes offer.