Interesting text from a Northrop Grumman patent regarding a fixed geometry nozzle capable of subsonic, sonic, and supersonic speeds, eludes to the potential use of the XA series of next gen engines for 6th gen fighter aircraft, and quote, "Almost all nozzles have a convergent section because it increases the pressure in the rest of the engine-potentially yielding more thrust by acting on the forward sections. It is important to note that convergent nozzles end with this convergent section, and in general, narrower convergent nozzles give lower thrust and higher exhaust speed, but wider convergent nozzles give lower exhaust speed and higher thrust". Placing specific emphasis on the segment regarding yielding more thrust by acting on forward sections.