Clustering the engines together atop the wide tail of a flattened fuselage enables them to reenergize the slow-moving boundary layer over the fuselage to increase efficiency, and allow a clean, low drag, high aspect ratio wing. Starting with slower flow, the reduction in exhaust velocity increases the propulsive efficiency with a similar specific thrust. By ingesting and reenergizing the boundary layer flow, BLI reduces by 40% in the D8 the wasted kinetic energy in the combined high-velocity jet exhaust and slow-speed wake behind the fuselage.