[Sirius Lee]

Flying wings are a very efficient design until they're not. Some are prone to pitch instability in situations where a a traditional tailed or even a canard design would recover easily enough.

Then again, if you have crappy software it's not going to make any difference. Ask Boeing.

[hattend]

Witness makes it sound like engine problem.

Not sure.

[Hulka]

Efficient design. . .and many decades ago some thought went into designing such and aircraft for airline use.

Problem was, after they discussed and thought about it, it dawned on them that unless you are sitting near the center-line of the aircraft, when the aircraft turned, people sitting farthest from the center-line would ride up-and-down like a roller coaster. Yuck.