A propulsion system for a vehicle, the system comprising: a primary airfoil wing coupled to the vehicle; a first augmenting airfoil coupled to the vehicle and positioned downstream of fluid flowing over the primary airfoil wing, the first augmenting airfoil comprising a first output structure (705,706) and at least one first conduit coupled to the first output structure, the at least one first conduit configured to introduce to the first output structure (705,706) a primary fluid produced by the vehicle, the first output structure comprising a first terminal end configured to provide egress for the introduced primary fluid toward the primary airfoil wing and out of the first augmenting airfoil; a secondary airfoil wing located directly downstream of the first augmenting airfoil such that the fluid flowing over the primary airfoil wing and the primary fluid from the first augmenting airfoil flows over the secondary airfoil wing; and a second augmenting airfoil coupled to the vehicle and positioned downstream of fluid flowing over the primary airfoil wing, each of the first and second augmenting airfoils (702,902) having a leading edge (716,916) disposed toward the primary airfoil wing, the first augmenting airfoil opposing the second augmenting airfoil whereby: the first and second augmenting airfoils (702,902) define a diffusing region therebetween and along their lengths; characterized in that the leading edges define an intake region configured to receive and introduce to the diffusing region the primary fluid and the fluid flowing over the primary airfoil wing, the diffusing region comprising a primary terminal end configured to mix and provide the introduced primary fluid and fluid flowing over the primary airfoil wing to the secondary airfoil wing. a primary airfoil wing coupled to the vehicle; a first augmenting airfoil coupled to the vehicle and positioned downstream of fluid flowing over the primary airfoil wing, the first augmenting airfoil comprising a first output structure (705,706) and at least one first conduit coupled to the first output structure, the at least one first conduit configured to introduce to the first output structure (705,706) a primary fluid produced by the vehicle, the first output structure comprising a first terminal end configured to provide egress for the introduced primary fluid toward the primary airfoil wing and out of the first augmenting airfoil; a secondary airfoil wing located directly downstream of the first augmenting airfoil such that the fluid flowing over the primary airfoil wing and the primary fluid from the first augmenting airfoil flows over the secondary airfoil wing; and a second augmenting airfoil coupled to the vehicle and positioned downstream of fluid flowing over the primary airfoil wing, each of the first and second augmenting airfoils (702,902) having a leading edge (716,916) disposed toward the primary airfoil wing, the first augmenting airfoil opposing the second augmenting airfoil whereby: the first and second augmenting airfoils (702,902) define a diffusing region therebetween and along their lengths; characterized in that the leading edges define an intake region configured to receive and introduce to the diffusing region the primary fluid and the fluid flowing over the primary airfoil wing, the diffusing region comprising a primary terminal end configured to mix and provide the introduced primary fluid and fluid flowing over the primary airfoil wing to the secondary airfoil wing. the first and second augmenting airfoils (702,902) define a diffusing region therebetween and along their lengths; characterized in that the leading edges define an intake region configured to receive and introduce to the diffusing region the primary fluid and the fluid flowing over the primary airfoil wing, the diffusing region comprising a primary terminal end configured to mix and provide the introduced primary fluid and fluid flowing over the primary airfoil wing to the secondary airfoil wing.