Boundary layer ingestion benefit is experimentally and numerically investigated. Simple 2-dimensional-airfoil shape airframe with an electric fan configures an airframe/engine integration. Wind tunnel test was conducted with force measurement. Accompanying CFD calculation was conducted with a solver FaSTAR developed by JAXA. Experimental result shows that the embedded BLI configuration gives larger forward thrust than referential nonBLI configuration with same power consumption. For the force balance simulating the cruise condition, the BLI benefit of power saving is vilified. Accompanying CFD and analytical results well represents the BLI benefit.