many sub-optimalities of the blended-wing concept
This old study would suggest the BWB has many advantages over and above the current tube with wings. Boeing has certainly invested some serious money in the concept, having built a BWB wing box and air freighted it by Guppy from the west to east coast for testing.
http://citeseerx.ist.psu.edu/viewdoc...=rep1&type=pdf
http://www.dailypress.com/news/scien...212-story.html