NASA REVEALS three visions for a future airliner.

The design concepts reveal both two-engine and three-engine versions of the Boeing hybrid wing-body, a Northrop Grumman concept modelled closely on the Scaled Composites White Knight and a Lockheed Martin design featuring a box wing and twin, tail-mounted engines.

Here’s the Lockheed Martin design.


The Northrop Grumman and Boeing designs can be found at the link above.