[roedog]

A blended wing body and flying wing configuration have been flown. There are similarities to the saucer in that they use lifting body effects. They benefit from high lift-to-drag ratio.

However, the other handling qualities of these designs make them difficult to fly. Stability can be a real problem. I would guess that air handling problems were the issues that cancelled the saucer program. Perhaps the modern fly-by-wire computer control systems used today might make it easier to fly a saucer.