by shroud 31 is in a general rectangular shape of width greater than height shroud 31 contains all of the hot exhaust from the turbine engine 30 indicated in fig3 5 as 33 exhaust air from the fan 29 indicated in fig3 5 as 35 passes through the interior 37 of nacelle 19 as shown in fig7 forward of the commencement of shroud 31 the fan exhaust 35 passes around the housing for turbine engine 30 being split at the top by a portion of the housing connected to the nacelle interior surface 37 further downstream as shown in fig9 the fan exhaust 35 passes beneath the shroud 31 referring to fig3 5 a plurality of flaps are pivotally secured to the nacelle outlet for vectoring the exhaust by turning it between a horizontal flight position and a vertical flight position an upper flap 39 is mounted adjacent the trailing edge of the nacelle upper surface 21 flap 39 is pivotal from the position shown in fig3 to that shown in fig5 and is in the shape of an airfoil flap 39 includes a pair of vanes 41 43 rigidly secured to the upper leading edge of flap 39 vane 41 is considerably shorter in cord length than flap 39 and is sealed against the trailing edge of the nacelle upper surface 21 vane 41 moves against this trailing edge while pivoting from the position shown in fig3 to that shown in fig5 vane 43 is mounted between flap 39 and vane 41 and is also considerably shorter in cord length than flap 39 an upper nozzle or slot 45 exists between vanes 41 and 43 an intermediate nozzle or slot 47 exists.