Goldschmied body shape. Propeller uses boundary layer air. Could be efficient. If center of gravity is far back with a really short tail moment arm and most of

Goldschmied body shape. Propeller uses boundary layer air. Could be efficient. If center of gravity is far back with a really short tail moment arm and most of the big body is in the front, there could be control, stability and center of gravity issues. Is it possible to ealk around the cabin during flight? Piaggio Avanti is somewhat similar on being an advanced concept with high efficiency. I think they just stopped the manufacture.