21 2006 fig3 shows a rear view of the doors of fig2 fig3 shows that a portion of the efflux exits through a crescent shaped rear opening 40 defined between the trailing edges 24 a 26 a of the doors 24 26 as shown by the small arrow a 4 in fig2 the rear opening 40 is generally oriented downwards as the plane of the opening 40 faces the rear and has a downward orientation the flow of gas out of the rear opening 40 is then oriented toward the rear bottom it generates a resulting force creating a nose down pitching moment on the aircraft because the force has an upward vertical component and that it is at the rear of the engine this force also has a horizontal component opposing the braking force on the aircraft but its magnitude is much smaller than the braking force and consequently the overall retarding force produced by the thrust reverser is substantially unaffected the nose down pitching moment during aircraft landing with the reverser deployed improves the controllability of the aircraft on the ground but when the reverser is in its stowed configuration the forward thrust produced by the engine is not affected as the centerlines of the engine and of the reverser are collinear in other words the configuration of the present thrust reverser does not require modification of the angle of the thrust vector produced by the engine when the reverser is in its stowed position also when the reverser.